GB 18585-2001 Limits of harmful substances in wallpapers for interior decoration and furnishing
Some standard content:
ICS_85.080
National Standard of the People's Republic of China
GB 18585—2001
Indoor decorating and refurbishing materials
Limit of harmful substances of wallpapers2001-12-10 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
2002-01-01 Implementation
GB18585—2001
Chapter 4 of this standard is mandatory, and the rest are recommended. The test methods in this standard are not equivalent to those of European Standard EN12149:1997 "Determination of migration of heavy metal elements and other certain elements, ethylene oxide monomer and formaldehyde release". The technical indicators in this standard are not equivalent to the European standard EN2331999 Volume Simple Wallpaper - Specifications for Finished Wallpaper, Vinyl Wallpaper and Plastic Wallpaper. From January 1, 2002, the products produced by the production enterprises shall comply with this national standard, with a transition period of 6 months. From July 1, 2002, the products that do not comply with this national standard shall be stopped from being sold on the market. This standard is proposed by the China Light Industry Federation and is under the jurisdiction of the National Technical Committee for Standardization of Paper Industry. The responsible drafting units of this standard are: China Pulp and Paper Research Institute, Guangdong Paper Research Institute. The participating drafting units of this standard are: Jiangsu Aishe Wallpaper Co., Ltd., Guangdong Jiangmen Yuhua Wallpaper Co., Ltd. The main drafters of this standard are: Chang Yongsong, Li Lanfen, Ma Xuekui, Chen Yang. This standard is published for the first time.
This standard is entrusted to the National Technical Committee for Standardization of Paper Industry for interpretation. 1 Scope
Indoor decoration materials
Limits of harmful substances in wallpaper
GB 18585—2001
This standard specifies the limits, test methods and inspection rules for three harmful substances: heavy metals (or other) elements, ethylene oxide monomers and formaldehyde in wallpaper.
This standard is mainly applicable to wallpaper with paper as the base material. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties who reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all undated referenced documents, the latest versions shall apply to this standard. GB/T4615-1984 Method for determination of residual vinyl chloride monomer content in polyvinyl chloride resin GB/T10342 Packaging and marking of paper
GB/T10739 Standard for handling and testing of pulp, paper and paperboard samples (eqv[S0187:1984) 3 Terms and definitions
The following terms and definitions apply to this standard. Wallpaper
wallpapers
Decorative materials mainly based on paper and attached to the wall or ceiling by adhesive, excluding wall felt and other similar wall hangings. 4 Requirements
The limit values of harmful substances in wallpaper shall comply with the provisions of Table 1. Table 1 Limits of harmful substances in wallpapers Harmful substance name
Heavy metal (or other) elements
Vinyl chloride monomer
Unit: mg/kg
Limit value
GB18585-2001
5 Sample collection, preparation and pretreatment
5.1 Wallpapers of the same variety, formula and process are considered as one batch, and each batch shall not exceed 5,000 m. 5.2 Random sampling is carried out in batches, and at least 5 rolls of wallpaper are selected from each batch, and the wallpapers are sealed and packaged in non-polyfluoroethylene plastic film and placed in a dark place for inspection.
5.3 Cut several samples of 1m in length and full width every 1Ⅱ from the end of the wallpaper. 5.4 Cut several samples of (30±1)mm in width and (50±1)mm in length from the sample, and the width direction of the sample shall be consistent with the longitudinal direction of the wallpaper roll. Cut at least 150 rectangular specimens from all samples. 5.5 Select 70 rectangular specimens with the most coating or the darkest color by visual inspection, and process the specimens according to GB/T10739. After processing, 50 specimens are used to determine the formaldehyde content, and the other 20 specimens are divided into two groups, each with 10 specimens, and cut into squares of about 6mm×6mm. One group is used to determine the heavy metal (or other) elements, and the other group is used to determine the content of vinyl chloride monomer. 6 Test method
6.1 Determination of heavy metal (or other) element content 6.1.1 Principle
Under the specified conditions, the soluble organic elements in the sample are extracted, and the total amount of heavy metal (or other) elements in the extract is determined.
6.1.2 Reagents
Unless otherwise specified in the analysis, only analytically pure reagents and distilled or deionized water shall be used. 6.1.2.1 Hydrochloric acid (HCl) solution, (0.07±0.005) mal/L. 6.1.2.2 Hydrochloric acid (HCl) solution, (2±0.1) mol/L. 6.1.3 Apparatus
6.1.3.1 Common laboratory equipment and glassware. 6.1.3.2 pH meter, accurate to 0.2 pH value. 6.1.3.3 Magnetic stirrer, speed (1000±10) r/min. 6.1.3.4 Oven, capable of maintaining a temperature of (37±2)°C. 6.1.3.5 Microporous membrane with a diameter of 0.45 μm. 6.1.3.6 Atomic absorption spectrophotometer.
6.1.3.7 ICP inductively coupled plasma atomic emission spectrometer. 6.1.4 Test steps
6.1.4.1 Extraction method:
Accurately weigh 1 g (accurate to 0.0001 g) of small positive force sample and place it in a glass container with a volume of 100 mL, then add (50 ± 0.1) mL of 0.07 mol/L hydrochloric acid, shake for 1 min, and measure the pH value of the solution. If the pH is > 1.5, add 2 mol/L hydrochloric acid dropwise while shaking until the pH is between 1.0 and 1.5. Put the container on a magnetic stirrer and put it in an oven at (37 ± 2)°C, stir at this temperature for (60 ± 2) min, and then remove the stirrer. Then place in an oven at (37 ± 2) °C for (60 ± 2) min, and immediately filter the solution with a 0.45 μm microporous membrane. Collect the filtrate and reserve it for determination of the content of heavy metals (or other) elements. 6.1.4.2 The following two methods can be used for determination. During arbitration, the atomic absorption spectrophotometry shall be used: a) Atomic absorption spectrophotometry!
b) ICP inductively coupled plasma atomic emission spectrophotometry 6.1.5 Result calculation
Calculate the content of each heavy metal (or other) element in the sample according to formula (1), expressed in m/kg, where:
R——the content of the heavy metal (or other) element in the sample being tested, in milligrams per kilogram (mg/kg); the concentration of the heavy metal (or other) element in the extract, in milligrams per liter (mg/L); the mass of the sample, in grams (g).
The test result shall be reported as the analysis result after correction by formula (2) and rounded to the third decimal place. Ri = R(1 - T)
Wherein:
GB18585-2001
R, is the heavy metal (or other) element content of the tested sample, in milligrams per kilogram (mg/kg); R is the heavy metal (or other) element content of the tested sample, in milligrams per kilogram (mg/kg); T is the correction factor (see Table 2).
Table 2 Correction factors
Correction factor (T)
For example: the result of lead is 120 mg/kg-the corresponding correction factor T is 0.3, and the result of the analysis after correction is R,=120(1-0.3)=120×0.7=84 mg/kg.6.2 Determination of ethylene oxide monomer content
The determination of vinyl chloride monomer content shall be carried out in accordance with the provisions of GB/T4615-1984. 6.3 Determination of formaldehyde content
6.3.1 Principle
Hang the sample in a sealed container filled with 40℃ distilled water. After 24 hours, it is absorbed by water and the formaldehyde content in the distilled water is determined. Within 24 hours, the formaldehyde absorbed by water is used as a reference for photometric determination using a blank solution with acetylacetone as the reagent. 6.3.2 Reagents
If not otherwise specified in the analysis, only analytically pure reagents and distilled water or deionized water shall be used. 6.3.2.1 Acetylacetone (CH—CO—CH2—CO—CH3), high-grade purity. 6.3.2.2 Acetic acid amine (CH3COONH3), high-grade purity. 6.3.2.3 Formaldehyde solution (CH30), 350 g/L~400 g/L. 6.3.2.4 Preparation of acetylacetone (CH30—CO—CH2—CO~CH3) solution (volume fraction 0.4%): Place 4 mL of acetylacetone in a volumetric flask, dilute to 1000 mL with water, store in a sealed airtight container, and place in a dark place. Note: Under this condition, the solution can be kept stable for 4 weeks. 6.3.2.5 Preparation of acetic acid amine (CH3COONH4) solution (200 g/L): Dissolve 200 g acetic acid amine in water in a volumetric flask and dilute to 1 000 mL with water.
6.3.3 Standard solutions
6.3.3.1 Iodine (I2O3) solution, 0.05 mal/L. 6.3.3.2 Sodium thiosulfate (Ne2SO4) solution, 0.1 mol/L. 6.3.3.3 Sodium hydroxide (NaOH) solution, 1 mol/L. 6.3.3.4 Sulfuric acid (H2SO4) solution, 1 mol/L. The above standard solutions should be calibrated before use. 6.3.3.5 Starch solution, mass fraction is 1%. 6.3.4 Formaldehyde standard solution
6.3.4.1 Formaldehyde standard solution A
GB18585—2001
Put 1 ml of formaldehyde solution in a volumetric flask, dilute it to 1 000 ml with water, and calibrate it according to the following steps. Take 20 ml of the diluted formaldehyde solution A, mix it with 25 ml of iodine solution and 10 ml of sodium hydroxide solution, store it in a dark place for 15 min, and then add 15 ml of sulfuric acid. Back-titrate the excess iodine with sodium thiosulfate solution. When the titration end point is approaching, add a few ml of starch solution as an indicator. Use 20 ml of water for a blank parallel test, and calculate the concentration of formaldehyde solution A according to formula (3). 1000
t=(VV)xd x
Where:
c is the concentration of formaldehyde solution A, in milligrams per liter (mg/L); x 15
V is the volume of sodium thiosulfate solution consumed by the sample, in milliliters (mL); V is the volume of sodium thiosulfate solution consumed by the blank sample, in milliliters (mL); c is the concentration of sodium thiosulfate solution, in mol/L, 6. 3. 4. 2 Formaldehyde standard solution B
According to the concentration of standard solution A, calculate the volume of standard solution A required to contain 15 mg formaldehyde. Use a microburette to measure this volume of formaldehyde standard solution A into a volumetric flask and dilute it to 1 000 mL with water. Note: 1 mL of this solution contains 15 g of formaldehyde solution. 6.3.5 Calibration solutions
According to Table 3, add different water to 6 100 mL volumetric flasks filled with formaldehyde standard solution B for static dilution to prepare formaldehyde series calibration solutions with formaldehyde content ranging from 0 to 15 μg/mL. Table 3 Formaldehyde series calibration solutions
Volume of standard solution added
6.3.6 Apparatus
6.3.6.1 Conventional laboratory apparatus.
Volume of water added
6.3.6.2 Volumetric flasks, 50 mL, 100 mL and 1000 mL.
6.3.6.3 Burette and microburette.
6.3.6.4 Pipet.
6.3.6.5 Oven.
6.3.6.6 Water bath, which can maintain a temperature of (40±2)℃. 6.3.6.7 Spectrophotometer, which can measure the absorbance at a wavelength of 410 nm~～415 nm. Formaldehyde content
μg/ral
6.3.6.8 Vinyl or glass wide-mouth bottle with a cover, with a capacity of 1000 mL, and a hook under the bottle cover. 6.3.7 Test procedure
6.3.7.1 Hang 50 rectangular samples on the hook of a 1U00mL wide-mouth bottle (see Figure 1), so that the decorative coating surfaces of the samples are opposite to each other, keep the samples from contacting the wall of the wide-mouth bottle and the liquid surface, and weigh them. If the sample is too thick and the hook cannot hold 50 samples, it should be hung as high as possible, and the number of samples should be counted and weighed.
6.3.7.2 Use a 50 mL pipette to add 50 mL of water into a 1 000 mL wide-mouth bottle. Tighten the bottle cap to seal it, and move the wide-mouth bottle into a (40 ± 2)°C oven for 24 hours.
6.3.7.3 After 24 hours, remove the sample from the wide-mouth bottle, open the bottle cap and take out the sample. 6.3.7.4 Use a pipette to draw 10 mL of absorption water from the wide-mouth bottle and place it into a 50 mL volumetric flask. Then use a pipette to draw 10 mL of each formaldehyde calibration solution and place it into each 50 mL volumetric flask. 1-50 wallpaper samples,
2-50mL distilled water.
Figure 1 Sample layout
GB 18585-2001
6.3.7.5 Add 10mL acetylacetone solution and 10mL acetamide solution to each volumetric flask, cover the flask and shake. 6.3.7.6 Heat each volumetric flask in a water bath at (40±2)°C for 15 min, remove it from the water bath and place it in a dark place, and cool it at room temperature for 1h.
6.3.7.7 Measure the maximum absorbance of the solution in the volumetric flask at a wavelength of 410 nm~~415 nm with a spectrophotometer, or measure the fluorescence value of the solution in the volumetric flask at a wavelength of 500nm~510nm with a quartz sample cell with an optical path length of 10mm with reference to the blank test of water.
6.3.7.8 Carry out a parallel blank test in the same steps as the test. 6.3.7.9 Draw a curve graph of the absorbance or fluorescence value corresponding to the concentration of the formaldehyde calibration solution. And read the formaldehyde concentration released by the sample from the curve graph according to the absorbance or fluorescence value. 6. 3.8 Calculation of results
Subtract the formaldehyde concentration value in the parallel blank test from the formaldehyde concentration value of the sample read on the curve graph, which is the spectrum measurement result c. Calculate the amount of formaldehyde released by the sample within 24 hours according to formula (4), expressed in mg/kg, and rounded to an integer. Where:
G=50×
Formaldehyde released from the wallpaper, in milligrams per kilogram (mg/kg); Spectral measurement result corrected by the blank test, in micrograms per milliliter (μg/mL) m
The mass of the domain sample hanging on the hook, in grams (g). 7 Inspection rules
7.1 All the limit indicators listed in this standard are type inspection items. 7.2 Under normal circumstances, type inspection shall be carried out at least once a year. 7.3 Type inspection shall be carried out at any time when any of the following situations occurs: When a new product is trial-produced;
G18585—2001
—When a product is produced in a different place 1
When there are major changes in the production formula, process and raw materials; —When production is resumed after a 3-month suspension; —When the customer makes a request.
7.4 Determination of inspection results
If all inspection results meet the requirements of this standard, the batch of products shall be judged as qualified products. If one inspection result does not meet the requirements of this standard, two samples shall be randomly selected from the original batch for full re-inspection. If the re-inspection results all meet the requirements of this standard, the batch of products shall be judged as qualified products 1If the re-inspection results still do not meet the requirements of this standard, the batch of products shall be judged as unqualified products. Packaging mark
Wallpaper should be packed with non-vinyl chloride plastic film, and its packaging mark should comply with the provisions of GB/T10342.) solution (200 g/L): Dissolve 200 g of acetylamine in water in a volumetric flask and dilute to 1 000 mL with water.
6.3.3 Standard solutions
6.3.3.1 Iodine (I,) solution, 0.05 mal/L. 6.3.3.2 Sodium thiosulfate (Ne,S,O,) solution, 0.1 mol/L. 6.3.3.3 Sodium hydroxide (NaOH) solution, 1 mol/L. 6.3.3.4 Sulfuric acid (H,SO,) solution, 1 mol/L. The above standard solutions should be calibrated before use. 6.3.3.5 Starch solution, mass fraction is 1%. 6.3.4 Formaldehyde standard solution
6.3.4.1 Formaldehyde standard solution A
GB18585—2001
Put 1 ml of formaldehyde solution in a volumetric flask, dilute it to 1 000 ml with water, and calibrate it according to the following steps. Take 20 ml of the diluted formaldehyde solution A, mix it with 25 ml of iodine solution and 10 ml of sodium hydroxide solution, store it in a dark place for 15 min, and then add 15 ml of sulfuric acid. Back-titrate the excess iodine with sodium thiosulfate solution. When the titration end point is approaching, add a few ml of starch solution as an indicator. Use 20 ml of water for a blank parallel test, and calculate the concentration of formaldehyde solution A according to formula (3). 1000
t=(VV)xd x
Where:
c is the concentration of formaldehyde solution A, in milligrams per liter (mg/L); x 15
V is the volume of sodium thiosulfate solution consumed by the sample, in milliliters (mL); V is the volume of sodium thiosulfate solution consumed by the blank sample, in milliliters (mL); c is the concentration of sodium thiosulfate solution, in mol/L, 6. 3. 4. 2 Formaldehyde standard solution B
According to the concentration of standard solution A, calculate the volume of standard solution A required to contain 15 mg formaldehyde. Use a microburette to measure this volume of formaldehyde standard solution A into a volumetric flask and dilute it to 1 000 mL with water. Note: 1 mL of this solution contains 15 g of formaldehyde solution. 6.3.5 Calibration solutions
According to Table 3, add different water to 6 100 mL volumetric flasks filled with formaldehyde standard solution B for static dilution to prepare formaldehyde series calibration solutions with formaldehyde content ranging from 0 to 15 μg/mL. Table 3 Formaldehyde series calibration solutions
Volume of standard solution added
6.3.6 Apparatus
6.3.6.1 Conventional laboratory apparatus.
Volume of water added
6.3.6.2 Volumetric flasks, 50 mL, 100 mL and 1000 mL.
6.3.6.3 Burette and microburette.
6.3.6.4 Pipet.
6.3.6.5 Oven.
6.3.6.6 Water bath, which can maintain a temperature of (40±2)℃. 6.3.6.7 Spectrophotometer, which can measure the absorbance at a wavelength of 410 nm~～415 nm. Formaldehyde content
μg/ral
6.3.6.8 Vinyl or glass wide-mouth bottle with a cover, with a capacity of 1000 mL, and a hook under the bottle cover. 6.3.7 Test procedure
6.3.7.1 Hang 50 rectangular samples on the hook of a 1U00mL wide-mouth bottle (see Figure 1), so that the decorative coating surfaces of the samples are opposite to each other, keep the samples from contacting the wall of the wide-mouth bottle and the liquid surface, and weigh them. If the sample is too thick and the hook cannot hold 50 samples, it should be hung as high as possible, and the number of samples should be counted and weighed.
6.3.7.2 Use a 50 mL pipette to add 50 mL of water into a 1 000 mL wide-mouth bottle. Tighten the bottle cap to seal it, and move the wide-mouth bottle into a (40 ± 2)°C oven for 24 hours.
6.3.7.3 After 24 hours, remove the sample from the wide-mouth bottle, open the bottle cap and take out the sample. 6.3.7.4 Use a pipette to draw 10 mL of absorption water from the wide-mouth bottle and place it into a 50 mL volumetric flask. Then use a pipette to draw 10 mL of each formaldehyde calibration solution and place it into each 50 mL volumetric flask. 1-50 wallpaper samples,
2-50mL distilled water.
Figure 1 Sample layout
GB 18585-2001
6.3.7.5 Add 10mL acetylacetone solution and 10mL acetamide solution to each volumetric flask, cover the flask and shake. 6.3.7.6 Heat each volumetric flask in a water bath at (40±2)°C for 15 min, remove it from the water bath and place it in a dark place, and cool it at room temperature for 1h.
6.3.7.7 Measure the maximum absorbance of the solution in the volumetric flask at a wavelength of 410 nm~~415 nm with a spectrophotometer, or measure the fluorescence value of the solution in the volumetric flask at a wavelength of 500nm~510nm with a quartz sample cell with an optical path length of 10mm with reference to the blank test of water.
6.3.7.8 Carry out a parallel blank test in the same steps as the test. 6.3.7.9 Draw a curve graph of the absorbance or fluorescence value corresponding to the concentration of the formaldehyde calibration solution. And read the formaldehyde concentration released by the sample from the curve graph according to the absorbance or fluorescence value. 6. 3.8 Calculation of results
Subtract the formaldehyde concentration value in the parallel blank test from the formaldehyde concentration value of the sample read on the curve graph, which is the spectrum measurement result c. Calculate the amount of formaldehyde released by the sample within 24 hours according to formula (4), expressed in mg/kg, and rounded to an integer. Where:
G=50×
Formaldehyde released from the wallpaper, in milligrams per kilogram (mg/kg); Spectral measurement result corrected by the blank test, in micrograms per milliliter (μg/mL) m
The mass of the domain sample hanging on the hook, in grams (g). 7 Inspection rules
7.1 All the limit indicators listed in this standard are type inspection items. 7.2 Under normal circumstances, type inspection shall be carried out at least once a year. 7.3 Type inspection shall be carried out at any time when any of the following situations occurs: When a new product is trial-produced;
G18585—2001
—When a product is produced in a different place 1
When there are major changes in the production formula, process and raw materials; —When production is resumed after a 3-month suspension; —When the customer makes a request.
7.4 Determination of inspection results
If all inspection results meet the requirements of this standard, the batch of products shall be judged as qualified products. If one inspection result does not meet the requirements of this standard, two samples shall be randomly selected from the original batch for full re-inspection. If the re-inspection results all meet the requirements of this standard, the batch of products shall be judged as qualified products 1If the re-inspection results still do not meet the requirements of this standard, the batch of products shall be judged as unqualified products. Packaging mark
Wallpaper should be packed with non-vinyl chloride plastic film, and its packaging mark should comply with the provisions of GB/T10342.) solution (200 g/L): Dissolve 200 g of acetylamine in water in a volumetric flask and dilute to 1 000 mL with water.
6.3.3 Standard solutions
6.3.3.1 Iodine (I,) solution, 0.05 mal/L. 6.3.3.2 Sodium thiosulfate (Ne,S,O,) solution, 0.1 mol/L. 6.3.3.3 Sodium hydroxide (NaOH) solution, 1 mol/L. 6.3.3.4 Sulfuric acid (H,SO,) solution, 1 mol/L. The above standard solutions should be calibrated before use. 6.3.3.5 Starch solution, mass fraction is 1%. 6.3.4 Formaldehyde standard solution
6.3.4.1 Formaldehyde standard solution A
GB18585—2001
Put 1 ml of formaldehyde solution in a volumetric flask, dilute it to 1 000 ml with water, and calibrate it according to the following steps. Take 20 ml of the diluted formaldehyde solution A, mix it with 25 ml of iodine solution and 10 ml of sodium hydroxide solution, store it in a dark place for 15 min, and then add 15 ml of sulfuric acid. Back-titrate the excess iodine with sodium thiosulfate solution. When the titration end point is approaching, add a few ml of starch solution as an indicator. Use 20 ml of water for a blank parallel test, and calculate the concentration of formaldehyde solution A according to formula (3). 1000
t=(VV)xd x
Where:
c is the concentration of formaldehyde solution A, in milligrams per liter (mg/L); x 15
V is the volume of sodium thiosulfate solution consumed by the sample, in milliliters (mL); V is the volume of sodium thiosulfate solution consumed by the blank sample, in milliliters (mL); c is the concentration of sodium thiosulfate solution, in mol/L, 6. 3. 4. 2 Formaldehyde standard solution B
According to the concentration of standard solution A, calculate the volume of standard solution A required to contain 15 mg formaldehyde. Use a microburette to measure this volume of formaldehyde standard solution A into a volumetric flask and dilute it to 1 000 mL with water. Note: 1 mL of this solution contains 15 g of formaldehyde solution. 6.3.5 Calibration solutions
According to Table 3, add different water to 6 100 mL volumetric flasks filled with formaldehyde standard solution B for static dilution to prepare formaldehyde series calibration solutions with formaldehyde content ranging from 0 to 15 μg/mL. Table 3 Formaldehyde series calibration solutions
Volume of standard solution added bzxZ.net
6.3.6 Apparatus
6.3.6.1 Conventional laboratory apparatus.
Volume of water added
6.3.6.2 Volumetric flasks, 50 mL, 100 mL and 1000 mL.
6.3.6.3 Burette and microburette.
6.3.6.4 Pipet.
6.3.6.5 Oven.
6.3.6.6 Water bath, which can maintain a temperature of (40±2)℃. 6.3.6.7 Spectrophotometer, which can measure the absorbance at a wavelength of 410 nm~～415 nm. Formaldehyde content
μg/ral
6.3.6.8 Vinyl or glass wide-mouth bottle with a cover, with a capacity of 1000 mL, and a hook under the bottle cover. 6.3.7 Test procedure
6.3.7.1 Hang 50 rectangular samples on the hook of a 1U00mL wide-mouth bottle (see Figure 1), so that the decorative coating surfaces of the samples are opposite to each other, keep the samples from contacting the wall of the wide-mouth bottle and the liquid surface, and weigh them. If the sample is too thick and the hook cannot hold 50 samples, it should be hung as high as possible, and the number of samples should be counted and weighed.
6.3.7.2 Use a 50 mL pipette to add 50 mL of water into a 1 000 mL wide-mouth bottle. Tighten the bottle cap to seal it, and move the wide-mouth bottle into a (40 ± 2)°C oven for 24 hours.
6.3.7.3 After 24 hours, remove the sample from the wide-mouth bottle, open the bottle cap and take out the sample. 6.3.7.4 Use a pipette to draw 10 mL of absorption water from the wide-mouth bottle and place it into a 50 mL volumetric flask. Then use a pipette to draw 10 mL of each formaldehyde calibration solution and place it into each 50 mL volumetric flask. 1-50 wallpaper samples,
2-50mL distilled water.
Figure 1 Sample layout
GB 18585-2001
6.3.7.5 Add 10mL acetylacetone solution and 10mL acetamide solution to each volumetric flask, cover the flask and shake. 6.3.7.6 Heat each volumetric flask in a water bath at (40±2)°C for 15 min, remove it from the water bath and place it in a dark place, and cool it at room temperature for 1h.
6.3.7.7 Measure the maximum absorbance of the solution in the volumetric flask at a wavelength of 410 nm~~415 nm with a spectrophotometer, or measure the fluorescence value of the solution in the volumetric flask at a wavelength of 500nm~510nm with a quartz sample cell with an optical path length of 10mm with reference to the blank test of water.
6.3.7.8 Carry out a parallel blank test in the same steps as the test. 6.3.7.9 Draw a curve graph of the absorbance or fluorescence value corresponding to the concentration of the formaldehyde calibration solution. And read the formaldehyde concentration released by the sample from the curve graph according to the absorbance or fluorescence value. 6. 3.8 Calculation of results
Subtract the formaldehyde concentration value in the parallel blank test from the formaldehyde concentration value of the sample read on the curve graph, which is the spectrum measurement result c. Calculate the amount of formaldehyde released by the sample within 24 hours according to formula (4), expressed in mg/kg, and rounded to an integer. Where:
G=50×
Formaldehyde released from the wallpaper, in milligrams per kilogram (mg/kg); Spectral measurement result corrected by the blank test, in micrograms per milliliter (μg/mL) m
The mass of the domain sample hanging on the hook, in grams (g). 7 Inspection rules
7.1 All the limit indicators listed in this standard are type inspection items. 7.2 Under normal circumstances, type inspection shall be carried out at least once a year. 7.3 Type inspection shall be carried out at any time when any of the following situations occurs: When a new product is trial-produced;
G18585—2001
—When a product is produced in a different place 1
When there are major changes in the production formula, process and raw materials; —When production is resumed after a 3-month suspension; —When the customer makes a request.
7.4 Determination of inspection results
If all inspection results meet the requirements of this standard, the batch of products shall be judged as qualified products. If one inspection result does not meet the requirements of this standard, two samples shall be randomly selected from the original batch for full re-inspection. If the re-inspection results all meet the requirements of this standard, the batch of products shall be judged as qualified products 1If the re-inspection results still do not meet the requirements of this standard, the batch of products shall be judged as unqualified products. Packaging mark
Wallpaper should be packed with non-vinyl chloride plastic film, and its packaging mark should comply with the provisions of GB/T10342.The unit is milliliter (mL); V. — the volume of sodium thiosulfate solution consumed by the blank sample, in milliliters (mL); c — the concentration of sodium thiosulfate solution, in mol/L. 6.3.4.2 Formaldehyde standard solution B
According to the concentration of standard solution A, calculate the volume of standard solution A required to contain 15 mg formaldehyde. Use a microburette to measure this volume of formaldehyde standard solution A into a volumetric flask and dilute it to 1 000 mL with water. Note: 1 mL of such solution contains 15 g of formaldehyde solution. 6.3.5 Calibration solution
According to the provisions of Table 3, add different water into 6 100 mL volumetric flasks filled with formaldehyde standard solution B for static dilution to prepare a series of formaldehyde calibration solutions, so that the formaldehyde content ranges from 0 to 15 μg/mL. Table 3 Formaldehyde series calibration drops
Added standard solution and volume
6.3.6 Apparatus
6.3.6.1 Conventional laboratory apparatus.
Added water volume
6.3.6.2 Volumetric flasks, 50 mL, 100 mL and 1000 mL. 6.3.6.3 Burette and microburette.
6.3.6.4 Pipettes.
6.3.6.5 Oven.
6.3.6.6 Water bath, capable of maintaining a temperature of (40 ± 2) °C. 6.3.6.7 Spectrophotometer, capable of measuring absorbance at a wavelength of 410 nm to 415 nm. Formaldehyde content
μg/ral
6.3.6.8 Vinyl or glass jar with a lid, capacity of 1000 mL, with a hook under the lid. 6.3.7 Test procedure
6.3.7.1 Hang 50 rectangular specimens on the hook of a 1U00mL jar (see Figure 1), with the decorative coating surfaces of the specimens facing each other, keeping the specimens from contacting the jar wall and the liquid surface, and weighing them. If the specimen is too thick and the hook cannot hold 50 specimens, hang them as high as possible, count the number of specimens and weigh them.
6.3.7.2 Use a 50 mL pipette to add 50 mL of water into a 1 000 mL jar. Tighten the lid to seal it, and move the jar into an oven at (40±2)℃ for 24 hours.
6.3.7.3After 24 hours, remove the sample from the wide-mouth bottle, open the bottle cap and take out the sample. 6.3.7.4Use a pipette to draw 10 ml of absorption water from the wide-mouth bottle and put it into a 50 ml volumetric flask. Then use a pipette to draw 10 ml of various formaldehyde solutions and put them into each 50 ml volumetric flask. 1——50 wallpaper samples,
2—50 ml of distilled water.
Figure 1 Sample layout
GB 18585—2001
6.3.7.5Add 10 ml of acetylacetone solution and 10 ml of acetamide solution to each volumetric flask, cover the bottle cap and shake. 6.3.7.6 Place each volumetric flask in a water bath at (40 ± 2)°C and heat for 15 min, then remove from the water bath and place in a dark place, and cool at room temperature for 1 h.
6.3.7.7 Referring to the blank test of water, use a spectrophotometer to measure the maximum absorbance of the solution in the volumetric flask at a wavelength of 410 nm to 415 nm, or use a quartz sample cell with an optical path length of 10 mm to measure the fluorescence value of the solution in the volumetric flask at a wavelength of 500 nm to 510 nm.
6.3.7.8 Perform a parallel blank test according to the same steps as the test. 6.3.7.9 Draw a curve graph of the absorbance or fluorescence value corresponding to the concentration of the formaldehyde calibration solution. And read the formaldehyde concentration released by the sample from the curve graph based on the absorbance or fluorescence value. 6.3.8 Calculation of results
The formaldehyde concentration value of the sample read on the curve minus the formaldehyde concentration value in the parallel blank test is the spectrum measurement result c. Calculate the amount of formaldehyde released by the sample within 24 hours according to formula (4), expressed in mg/kg, and rounded to an integer. Where:
G=50×
the formaldehyde released from the wallpaper, in milligrams per kilogram (mg/kg); the spectrum measurement result corrected by the blank test, in micrograms per milliliter (μg/mL) m
the mass of the sample hanging on the hook, in grams (g). 7 Inspection rules
7.1 All the limit indicators listed in this standard are type inspection items. 7.2 Under normal circumstances, type inspection shall be carried out at least once a year. 7.3 Type inspection should be carried out at any time when any of the following situations occurs: when a new product is being trial-produced;
G18585—2001
—When a product is produced in a different place; 1
When there are major changes in the production formula, process and raw materials; 1When production is resumed after a 3-month suspension; 2When the customer makes a request.
7.4 Determination of inspection results
If all inspection results meet the requirements of this standard, the batch of products shall be judged as qualified products. If one inspection result does not meet the requirements of this standard, two samples shall be randomly selected from the original batch for full re-inspection. If the re-inspection results meet the requirements of this standard, the batch of products shall be judged as qualified products. 1If the re-inspection results still do not meet the requirements of this standard, the batch of products shall be judged as unqualified products. Packaging mark
Wallpaper shall be packaged with non-vinyl chloride plastic film, and its packaging mark shall comply with the requirements of GB/T10342.The unit is milliliter (mL); V. — the volume of sodium thiosulfate solution consumed by the blank sample, in milliliters (mL); c — the concentration of sodium thiosulfate solution, in mol/L. 6.3.4.2 Formaldehyde standard solution B
According to the concentration of standard solution A, calculate the volume of standard solution A required to contain 15 mg formaldehyde. Use a microburette to measure this volume of formaldehyde standard solution A into a volumetric flask and dilute it to 1 000 mL with water. Note: 1 mL of such solution contains 15 g of formaldehyde solution. 6.3.5 Calibration solution
According to the provisions of Table 3, add different water into 6 100 mL volumetric flasks filled with formaldehyde standard solution B for static dilution to prepare a series of formaldehyde calibration solutions, so that the formaldehyde content ranges from 0 to 15 μg/mL. Table 3 Formaldehyde series calibration drops
Added standard solution and volume
6.3.6 Apparatus
6.3.6.1 Conventional laboratory apparatus.
Added water volume
6.3.6.2 Volumetric flasks, 50 mL, 100 mL and 1000 mL. 6.3.6.3 Burette and microburette.
6.3.6.4 Pipettes.
6.3.6.5 Oven.
6.3.6.6 Water bath, capable of maintaining a temperature of (40 ± 2) °C. 6.3.6.7 Spectrophotometer, capable of measuring absorbance at a wavelength of 410 nm to 415 nm. Formaldehyde content
μg/ral
6.3.6.8 Vinyl or glass jar with a lid, capacity of 1000 mL, with a hook under the lid. 6.3.7 Test procedure
6.3.7.1 Hang 50 rectangular specimens on the hook of a 1U00mL jar (see Figure 1), with the decorative coating surfaces of the specimens facing each other, keeping the specimens from contacting the jar wall and the liquid surface, and weighing them. If the specimen is too thick and the hook cannot hold 50 specimens, hang them as high as possible, count the number of specimens and weigh them.
6.3.7.2 Use a 50 mL pipette to add 50 mL of water into a 1 000 mL jar. Tighten the lid to seal it, and move the jar into an oven at (40±2)℃ for 24 hours.
6.3.7.3After 24 hours, remove the sample from the wide-mouth bottle, open the bottle cap and take out the sample. 6.3.7.4Use a pipette to draw 10 ml of absorption water from the wide-mouth bottle and put it into a 50 ml volumetric flask. Then use a pipette to draw 10 ml of various formaldehyde solutions and put them into each 50 ml volumetric flask. 1——50 wallpaper samples,
2—50 ml of distilled water.
Figure 1 Sample layout
GB 18585—2001
6.3.7.5Add 10 ml of acetylacetone solution and 10 ml of acetamide solution to each volumetric flask, cover the bottle cap and shake. 6.3.7.6 Place each volumetric flask in a water bath at (40 ± 2)°C and heat for 15 min, then remove from the water bath and place in a dark place, and cool at room temperature for 1 h.
6.3.7.7 Referring to the blank test of water, use a spectrophotometer to measure the maximum absorbance of the solution in the volumetric flask at a wavelength of 410 nm to 415 nm, or use a quartz sample cell with an optical path length of 10 mm to measure the fluorescence value of the solution in the volumetric flask at a wavelength of 500 nm to 510 nm.
6.3.7.8 Perform a parallel blank test according to the same steps as the test. 6.3.7.9 Draw a curve graph of the absorbance or fluorescence value corresponding to the concentration of the formaldehyde calibration solution. And read the formaldehyde concentration released by the sample from the curve graph based on the absorbance or fluorescence value. 6.3.8 Calculation of results
The formaldehyde concentration value of the sample read on the curve minus the formaldehyde concentration value in the parallel blank test is the spectrum measurement result c. Calculate the amount of formaldehyde released by the sample within 24 hours according to formula (4), expressed in mg/kg, and rounded to an integer. Where:
G=50×
the formaldehyde released from the wallpaper, in milligrams per kilogram (mg/kg); the spectrum measurement result corrected by the blank test, in micrograms per milliliter (μg/mL) m
the mass of the sample hanging on the hook, in grams (g). 7 Inspection rules
7.1 All the limit indicators listed in this standard are type inspection items. 7.2 Under normal circumstances, type inspection shall be carried out at least once a year. 7.3 Type inspection should be carried out at any time when any of the following situations occurs: when a new product is being trial-produced;
G18585—2001
—When a product is produced in a different place; 1
When there are major changes in the production formula, process and raw materials; 1When production is resumed after a 3-month suspension; 2When the customer makes a request.
7.4 Determination of inspection results
If all inspection results meet the requirements of this standard, the batch of products shall be judged as qualified products. If one inspection result does not meet the requirements of this standard, two samples shall be randomly selected from the original batch for full re-inspection. If the re-inspection results meet the requirements of this standard, the batch of products shall be judged as qualified products. 1If the re-inspection results still do not meet the requirements of this standard, the batch of products shall be judged as unqualified products. Packaging mark
Wallpaper shall be packaged with non-vinyl chloride plastic film, and its packaging mark shall comply with the requirements of GB/T10342.Use a spectrophotometer to measure the maximum absorbance of the solution in the volumetric flask at a wavelength of 410 nm to 415 nm, or use a quartz sample cell with an optical path length of 10 mm to measure the fluorescence value of the solution in the volumetric flask at a wavelength of 500 nm to 510 nm, referring to the blank test of water.
6.3.7.8 Perform a parallel blank test in the same steps as the test. 6.3.7.9 Draw a curve graph of the absorbance or fluorescence value corresponding to the concentration of the formaldehyde calibration solution. And read the formaldehyde concentration released by the sample from the curve graph based on the absorbance or fluorescence value. 6.3.8 Result calculation
Subtract the formaldehyde concentration value in the parallel blank test from the formaldehyde concentration value of the sample read on the curve graph to obtain the spectrum measurement result c. Calculate the amount of formaldehyde released by the sample within 24 hours according to formula (4), expressed in mg/kg, and rounded to an integer. Where:
G=50×
The formaldehyde released from the wallpaper, in milligrams per kilogram (mg/kg); The spectral measurement result corrected by the blank test, in micrograms per milliliter (μg/mL) m
The mass of the sample hanging on the hook, in grams (g). 7 Inspection rules
7.1 All the limit indicators listed in this standard are type inspection items. 7.2 Under normal circumstances, type inspection shall be carried out at least once a year. 7.3 Type inspection shall be carried out at any time when one of the following situations occurs: When a new product is trial-produced,
G18585—2001
—When the product is produced in a different place 1
When there are major changes in the production formula, process and raw materials; —When production is resumed after a 3-month suspension; —When the customer makes a request.
7.4 Determination of test results
If all test results meet the requirements of this standard, the batch of products shall be judged as qualified products. If one test result fails to meet the requirements of this standard, two times the number of samples shall be randomly selected from the original batch for full re-test. If the re-test results meet the requirements of this standard, the batch of products shall be judged as qualified products. If the re-test results still fail to meet the requirements of this standard, the batch of products shall be judged as unqualified products. Packaging mark
Wallpaper shall be packaged with non-vinyl chloride plastic film, and its packaging mark shall comply with the requirements of GB/T10342.Use a spectrophotometer to measure the maximum absorbance of the solution in the volumetric flask at a wavelength of 410 nm to 415 nm, or use a quartz sample cell with an optical path length of 10 mm to measure the fluorescence value of the solution in the volumetric flask at a wavelength of 500 nm to 510 nm, referring to the blank test of water.
6.3.7.8 Perform a parallel blank test in the same steps as the test. 6.3.7.9 Draw a curve graph of the absorbance or fluorescence value corresponding to the concentration of the formaldehyde calibration solution. And read the formaldehyde concentration released by the sample from the curve graph based on the absorbance or fluorescence value. 6.3.8 Result calculation
Subtract the formaldehyde concentration value in the parallel blank test from the formaldehyde concentration value of the sample read on the curve graph to obtain the spectrum measurement result c. Calculate the amount of formaldehyde released by the sample within 24 hours according to formula (4), expressed in mg/kg, and rounded to an integer. Where:
G=50×
The formaldehyde released from the wallpaper, in milligrams per kilogram (mg/kg); The spectral measurement result corrected by the blank test, in micrograms per milliliter (μg/mL) m
The mass of the sample hanging on the hook, in grams (g). 7 Inspection rules
7.1 All the limit indicators listed in this standard are type inspection items. 7.2 Under normal circumstances, type inspection shall be carried out at least once a year. 7.3 Type inspection shall be carried out at any time when one of the following situations occurs: When a new product is trial-produced,
G18585—2001
—When the product is produced in a different place 1
When there are major changes in the production formula, process and raw materials; —When production is resumed after a 3-month suspension; —When the customer makes a request.
7.4 Determination of test results
If all test results meet the requirements of this standard, the batch of products shall be judged as qualified products. If one test result fails to meet the requirements of this standard, two times the number of samples shall be randomly selected from the original batch for full re-test. If the re-test results meet the requirements of this standard, the batch of products shall be judged as qualified products. If the re-test results still fail to meet the requirements of this standard, the batch of products shall be judged as unqualified products. Packaging mark
Wallpaper shall be packaged with non-vinyl chloride plastic film, and its packaging mark shall comply with the requirements of GB/T10342.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.