GB 18584-2001 Limits of harmful substances in wooden furniture for interior decoration and renovation
Some standard content:
ICS_97.140
National Standard of the People's Republic of China
GB18584—2001
Indoor decorating and refurbishing materials-Limit of harmful substances of wood based furniture
Indoor decorating and refurbishing materials-Limit of harmful substances of wood based furniture2001-12-10 Issued
People's Republic of China
General Administration of Quality Supervision, Inspection and Quarantine
2002-01-01 Implementation
GB 18584—2D01
Chapter 4 of this standard is mandatory, and the rest are recommended. From January 1, 2002, the products produced by the production enterprises shall comply with this national standard, and the transition period is 6 months: from July 1, 2002, the products that do not meet this national standard shall be stopped from being sold on the market. This standard is proposed by China Light Industry Federation and is under the jurisdiction of the National Furniture Standardization Center. The drafting units of this standard are: National Furniture Standardization Center, Nanjing Forestry University Wood Industry College, Beijing Institute of Building Materials Science.
The drafting units of this standard are: Beijing Tiantan Co., Ltd. Tiantan Furniture Branch, Beijing Jurancheng Decoration Development Co., Ltd., Shenzhen Dafuhao Industrial Development Co., Ltd., Shunde Meihua Furniture Manufacturing Co., Ltd., Shunde Hualong Paint Industry Co., Ltd. The main drafters of this standard are: Zhang Binyuan, Liu Xianguo, Luo, Yu Zhengrong, Gu Ming, Zhang Zengkui, Wang Linpeng, He Xunzheng, Chen Weiheng, Mai Quan. 1 Scope
Indoor decoration and renovation materials
Limits of harmful substances in furniture
GB18584—2001
This standard specifies the limit requirements, test methods and inspection rules for harmful substances in wooden furniture products used indoors. This standard applies to all types of wooden furniture products used indoors. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all referenced documents with dates, all subsequent amendments (excluding errata) or revised versions 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 referenced documents without dates, the latest versions are applicable to this standard. GB/T6682-1992 Specification and test methods for water used in analytical laboratories (neqISO3696:1987) GB/T9758.1-1988 Paints and varnishes - Determination of soluble metal content - Part 1: Determination of lead content - Flame atomic absorption spectrometry and dithiothreitol spectrophotometry (idtISO3856-1:1984) GB/T9758.4-1988 Paints and varnishes - Determination of "soluble" metal content - Part 4: Determination of cadmium content - Flame atomic absorption spectrometry and polarography (idtISO3856-4:1984) GB/T9758.6-1988 Paints and varnishes - Determination of "soluble" metal content - Part 6: Determination of total chromium content in the liquid part of the paint - Flame atomic absorption spectrometry (idtISO3856-6:1984) GB/T9758.7-1988 Paints and varnishes - Determination of "soluble" metal content - Part 1: Determination of lead content - Flame atomic absorption spectrometry and dithiothreitol spectrophotometry (idtISO3856-1:1984) Determination of "soluble" metal content Part VII: Determination of mercury content in the pigment part of paint and the liquid part of water-dilutable paint Flameless atomic absorption spectrometry (idtISO3856-7:1984) GB/T17657-1999 Test methods for physical and chemical properties of artificial boards and veneer artificial boards 3 Terms and definitions
This standard adopts the following terms and definitions.
Formaldehyde release
The formaldehyde release measured by the 24h desiccator method test specified in 4.12 of GB/T17657-1999 for artificial board specimens of furniture.
Soluble heavy metal content
The content of soluble heavy metals of lead, cadmium, chromium and mercury in the paint coating on the surface of furniture measured by the test method specified in GH/T9758-1988.
4 Requirements
The products of furniture shall comply with the requirements for the limit of harmful substances specified in Table 1. GB 185842001
Heavy metal content (limited to color)
5 Test method
5.1 Determination of methyl ether release
5.1.1 Principle
Table 1 Requirements for the limit of harmful substances
Formaldehyde release
Soluble lead
Soluble cadmium
Degradable mercury
The determination of formaldehyde release using a dryer is based on the following two steps: Limit value
The first step: Collecting formaldehyde: Place a crystal jar filled with distilled water at the bottom of the dryer, and place the test piece on a metal bracket fixed above it. The released formaldehyde is absorbed by the distilled water as the sample solution. The second step: Determine the formaldehyde concentration, use a spectrophotometer to measure the absorbance of the sample solution, and obtain the formaldehyde concentration from the pre-drawn calibration curve.
5.1.2 Instrument
5.1.2.1 Metal bracket.
5.1.2.2 Water tank.
5.1.2.3 Spectrophotometer.
5.1.2.4 Leveling
Quantity 0. 01 g+
Sensitivity 0. 0001 g.
Glass blood
Iodine value bottle: 500mL;
Single-line pipette. 0.1ml., 2.0ml, 25mL, 50mL, 100mLBrown acid burette, 50mL;
Brown alkaline burette, 50mL;
Graduating cylinder: 10mL.50mL, 100ml., 250ml., 500mLDry explosion device: diameter 240mm, volume (9~~11)L; surface blood: diameter (120~150)mm
White volumetric flask: 100mL, 1000ml., 2000mL; brown volumetric flask; 1000 mL+
Stoppered Erlenmeyer flask: 50mL, 100mL;
Beaker: 100mL.250mL.500mL1000mL, Brown narrow-necked bottle: 1000mL
Dropping bottle: 60mL
Glass mortar: diameter (100~120) mm; Crystallized blood: diameter 120mm, height 60mmz5.1.2.6 Small-mouthed plastic bottle: 500mL, 1000ml, 5.1.3 Reagents
Potassium iodide (KI). Analytical grade
Potassium dichromate (K,Cr,O,) Premium grade
Sodium thiosulfate (Na,SzOg .5H,O): analytically pure mercuric iodide (HgI,): analytically pure:
anhydrous sodium carbonate (NazCO,) analytically pure
sulfuric acid (H,SO,): p=1.84g/mL, analytically pure, hydrochloric acid (HCL): p=1.19g/mL, analytically pure, sodium hydroxide (NaOH): analytically pure:
iodine (T2): analytically pure;
pigmented starch: analytically pure:
acetylacetone (CH.COCH,COCH): premium pure ammonium acetate (CHCOONH): premium pure;
formaldehyde (CH,O) solution: concentration 35%~40%. 5.1.4 Test piece preparation
5. 1. 4. 1 Test piece sampling
GB 18584—2001
Test pieces shall be sampled from qualified products that meet the test requirements. If several types of wood materials are used in the product, samples shall be taken from the components of each material.
5.1.4.2 Test pieces shall be prepared within 50 mm from the edge of the furniture component. 5.1.4.3 Test piece specifications: length (150±1) mm, width (50±1) mm. 5. 1.4. 4 Test piece quantity
The total number of test pieces is 10. When preparing test pieces, the ratio of each wood material to the area used in the product shall be considered to determine the number of test pieces on each material component.
5.1.4.5 Specimen edge sealing
After the specimen is sawed, its surface should be immediately sealed with paraffin wax with a melting point of 65°C or formaldehyde-free adhesive tape. The number of edge sealings on the specimen surface should be the original actual number of edge sealings of the component, and at least one place with a width of 50mm should be left unsealed. 5.1.4.6 Specimen storage
The specimen should be prepared in the laboratory. The test should be started within 2 hours after the specimen is prepared, otherwise the specimen should be remade. 5. 1.5 Test steps
5. 1. 5. 1 Solution preparation
5.1.5.1.1 Sulfuric acid solution (1 mol/L): For the preparation method, see 4.11.5.2 of GB/T17657-1999. 5.1.5.1.2 Sodium hydroxide solution (0.1mol/L): Preparation method see 4.11.5.2 of GB/T17657-1999. 5.1.5.1-3 Starch solution (1%): Preparation method see 4.11.5.2 of GB/T17657-1999. 5.1.5.1.4 Sodium thiosulfate standard solution (0.1mol/L): Preparation method see 4.11.5.2 of GB/T17657-1999. 5.1.5.1.5 Iodine standard solution Liquid (0.05mol/L): see 4.11.5.2 of GB/T17657-1999 for the preparation method. 5.1.5.1.6 Acetylacetone solution (volume fraction of 0.4%): see 4.11.5.2 of GB/T17657-1999 for the preparation method. 5.1.5.1.7 Ammonium acetate solution (mass fraction of 20%): see 4.11.5.2 of GB/T17657-1999 for the preparation method. 5.1.5.2 Collection of formaldehyde
Place crystallization blood with a diameter of 120mm and a height of 60mm at the bottom of a dry medium with a diameter of 240mm and a volume of (9~11)L. Add 300mL of distilled water into the crystallization blood and place a metal bracket on the top of the dryer. Fix the test pieces on the metal bracket without contacting each other. The measuring device is placed at (20 ± 2) ℃ for 24 hours. Distilled water absorbs the formaldehyde released from the test piece. This solution is used as the test solution. 5.1.5.3 Quantitative method for formaldehyde concentration
Measure 10mL of acetylacetone (volume fraction is 0.4%) and 10m2L of ammonium acetate solution (mass fraction is 20%) in a 50mL stoppered conical flask, and then transfer 10mL of the test solution from the crystal blood to the flask. Put the stopper on the bottle, spread it evenly, and then put it in a water tank at <40 ± 2) ℃ GB 18584—2001
Heat for 15 minutes, then let the yellow-green reaction solution stand in a dark place and cool to room temperature (18℃～28℃, about 1 hour). At 412nm on the spectrophotometer, use steamed stuffing water as a reference drop and adjust to zero. Use a 5mm thick colorimetric blood to measure the absorbance A of the drop reaction solution. At the same time, use distilled water to replace the reaction solution for a blank test and determine the blank value as Ab. 5.1.5.4 Drawing of the standard curve
Draw the standard curve according to 4.11, 5.5, 2 of GB/T176571999. 5.1.5.5 Results
5.1.5.5. 1 The concentration of the formaldehyde solution is calculated according to formula (1) with an accuracy of 0.1 mg/L. c=f× (A-A)
Formaldehyde concentration, in milligrams per liter (mg/L); fStandard curve slope, in milligrams per liter (mg/L) rA.—Absorbance of the reaction solution;
A, absorbance of distilled water.
5. 2 Determination of soluble metal content
5.2.1 Principle
..--.(1)
The coating powder is treated with a certain concentration of dilute hydrochloric acid solution, and the heavy metal elements in the solution are determined by flame source atomic absorption spectrometry or flameless atomic absorption spectrometry.
5.2.2 Instruments
5.2.2.1 Stainless steel metal sieve: pore size 0.5mm5.2.2.2 Acidity meter: accuracy is ±0.2pH unit. 5.2.2.3 Filter membrane: pore size 0.45μm. 5.2.2.4 Magnetic stirrer: the outer layer of the stirrer should be plastic or glass. 5.2.2.5 Single scale pipette: 25ml
5.2.2.6 White volumetric flask: 50mL.
5.2.2.7 Scraper: A knife with a sharp blade. 5.2.3 Reagents
All reagents used are analytically pure, and the water used meets the requirements of grade 3 water in GB/T 6682-1992. 5.2.3.1 Hydrochloric acid solution
0. 07 mol/l., 1 mol/L. 2 mol/l. 5.2.3.2 Nitric acid solution
Mass fraction is 65%~~68%.
5.2.4 Preparation of coating powder
Use a scraper to scrape an appropriate amount of coating on the coating surface of the furniture product, and crush it with a magnetic stirrer at room temperature so that it can pass through a 0.5 mm metal sieve for processing.
5.2.5 Test steps
5.2.5.1 Sample treatment
Weigh 0.5 g (accurate to 0.0001 g) of the sieved powder sample, put it into a white volumetric flask, add 25 mL of 0.07 mol/L hydrochloric acid, stir for 1 min, and measure its acidity. If the pH is greater than 1.5, add 2 mol/L hydrochloric acid solution while shaking until the pH drops to 1.01.5. After stirring the mixture for 1 h at room temperature, let it stand for 1 h, then filter it immediately with a membrane filter and store it away from light.
The sample treatment should be completed within 4 h. If it is not completed within 4 h, add 25 mL of 1 Lol/L salt solution to treat the sample, and the treatment method is the same as above.
5.2.5.2 Determination of soluble metal content 5.2.5.2.1 The determination of soluble lead content shall be carried out in accordance with the requirements of Chapter 3 of GB/T9758.1-1988. 5.2.5.2.2 The determination of soluble cadmium content shall be carried out in accordance with the requirements of Chapter 3 of GB/T9758.4-1988. 5.2.5.2.3 The determination of soluble chromium content shall be carried out in accordance with GB/T9758.6-1988. 5.2.5.2.4 The determination of soluble mercury content shall be carried out in accordance with GB/T9758.7-1988. 5.2.5.3 Result calculation
The content of soluble heavy metals is calculated by formula (2), accurate to 0.1mg/kgC = (a - a) × 25 × F
C——soluble content of (lead, chromium, mercury), in milligrams per kilogram (mg/kg) GB 185B4-2001
as——blank concentration of 0.07mol or 1mol hydrochloric acid solution, in micrograms per milliliter (μg/nl), at——concentration of test solution (lead, chromium, mercury) measured from the standard curve, in micrograms per milliliter (μug/mL) F——dilution factor,
25——extracted hydrochloric acid drop, in milliliters (mL) m——sample volume weighed, in grams (g). 6 Inspection rules
6.1 All requirements listed in Chapter 4 of this standard are type inspection items. 6.1.1 Under normal production conditions, a periodic type inspection should be carried out regularly or after a certain amount of cumulative production. The cycle is generally one year. 6.1.2 Type inspection should be carried out in any of the following situations: When trial-making a new product 1
When the production process and its raw materials have changed significantly, when the product is resumed after a long period of suspension
—When the customer makes a request:
When the national quality supervision agency makes a request.
6.2 Determination of inspection results
6.2.1 When the results of all inspection items meet the requirements of this standard, the product is judged to be qualified. If one of the inspection results does not meet the requirements of this standard, the product is judged to be unqualified. 6.2.2 If there is any objection to the test result and a re-test is required, the re-test should be carried out on the original sealed sample or the prepared sample, and the judgment should be made according to the provisions of 6.2.1, and "re-test qualified" or "re-test unqualified" should be noted in the test report. 6.3 Test report
The test report should include the following contents:
6.3.1The number and name of this national standard:
6.3.2The name of the sample and other instructions,
6.3.3The test results and conclusions;
6.3.4Abnormal situations occurring during the test and other matters that need to be explained.The test pieces are fixed on the metal bracket without contact between the test pieces. The measuring device is placed at (20 ± 2) ℃ for 24 hours. Distilled water absorbs the formaldehyde released from the test piece. This solution is used as the test solution. 5.1.5.3 Quantitative method of formaldehyde concentration
Measure 10mL of acetylacetone (volume fraction is 0.4%) and 10m2L of ammonium acetate solution (mass fraction is 20%) in a 50mL stoppered conical flask, and then transfer 10mL of the test solution from the crystallized blood to the flask. Put the stopper on the bottle, spread it evenly, and then put it in a water tank at <40 ± 2) ℃ GB 18584—2001
Heat for 15 minutes, then let the yellow-green reaction solution stand in a dark place and cool to room temperature (18℃～28℃, about 1 hour). At 412nm on the spectrophotometer, use the steamed stuffing water as a reference drop and adjust to zero. Use a 5mm thick colorimetric blood to measure the absorbance A of the reaction solution. At the same time, use distilled water instead of the reaction solution to perform a blank test and determine the blank value as Ab. 5.1.5.4 Drawing of the standard curve
Draw the standard curve according to 4.11, 5.5, 2 of GB/T176571999. 5.1.5.5 Results and explanation
5.1.5.5. 1 The concentration of formaldehyde solution is calculated according to formula (1) with an accuracy of 0.1 mg/L. c=f× (A-A)
Formaldehyde concentration, in milligrams per liter (mg/L); fStandard curve slope, in milligrams per liter (mg/L) rA.—Absorbance of reaction solution;
A, absorbance of distilled water.
5. 2 Determination of soluble metal content
5.2.1 Principle
..--.(1)
The coating powder is treated with a certain concentration of dilute hydrochloric acid solution, and the heavy metal elements in the solution are determined by flame source atomic absorption spectrometry or flameless atomic absorption spectrometry.
5.2.2 Instruments
5.2.2.1 Stainless steel metal sieve: pore size 0.5mm5.2.2.2 Acidity meter: accuracy is ±0.2pH unit. 5.2.2.3 Filter membrane: pore size 0.45μm. 5.2.2.4 Magnetic stirrer: the outer layer of the stirrer should be plastic or glass. 5.2.2.5 Single scale pipette: 25ml
5.2.2.6 White volumetric flask: 50mL.
5.2.2.7 Scraper: A knife with a sharp blade. 5.2.3 Reagents
All reagents used are analytically pure, and the water used meets the requirements of grade 3 water in GB/T 6682-1992. 5.2.3.1 Hydrochloric acid solution
0. 07 mol/l., 1 mol/L. 2 mol/l. 5.2.3.2 Nitric acid solution
Mass fraction is 65%~~68%.
5.2.4 Preparation of coating powder
Use a scraper to scrape an appropriate amount of coating on the coating surface of the furniture product, and crush it with a magnetic stirrer at room temperature so that it can pass through a 0.5 mm metal sieve for processing.
5.2.5 Test steps
5.2.5.1 Sample treatment
Weigh 0.5 g (accurate to 0.0001 g) of the sieved powder sample, put it into a white volumetric flask, add 25 mL of 0.07 mol/L hydrochloric acid, stir for 1 min, and measure its acidity. If the pH is greater than 1.5, add 2 mol/L hydrochloric acid solution while shaking until the pH drops to 1.01.5. After stirring the mixture for 1 h at room temperature, let it stand for 1 h, then filter it immediately with a membrane filter and store it away from light.
The sample treatment should be completed within 4 h. If it is not completed within 4 h, add 25 mL of 1 Lol/L salt solution to treat the sample, and the treatment method is the same as above.
5.2.5.2 Determination of soluble metal content 5.2.5.2.1 The determination of soluble lead content shall be carried out in accordance with the requirements of Chapter 3 of GB/T9758.1-1988. 5.2.5.2.2 The determination of soluble cadmium content shall be carried out in accordance with the requirements of Chapter 3 of GB/T9758.4-1988. 5.2.5.2.3 The determination of soluble chromium content shall be carried out in accordance with GB/T9758.6-1988. 5.2.5.2.4 The determination of soluble mercury content shall be carried out in accordance with GB/T9758.7-1988. 5.2.5.3 Result calculation
The content of soluble heavy metals is calculated by formula (2), accurate to 0.1mg/kgC = (a - a) × 25 × F
C——soluble content of (lead, chromium, mercury), in milligrams per kilogram (mg/kg) GB 185B4-2001
as——blank concentration of 0.07mol or 1mol hydrochloric acid solution, in micrograms per milliliter (μg/nl), at——concentration of test solution (lead, chromium, mercury) measured from the standard curve, in micrograms per milliliter (μug/mL) F——dilution factor,
25——extracted hydrochloric acid drop, in milliliters (mL) m——sample volume weighed, in grams (g). 6 Inspection rules
6.1 All requirements listed in Chapter 4 of this standard are type inspection items. 6.1.1 Under normal production conditions, a periodic type inspection should be carried out regularly or after a certain amount of cumulative production. The cycle is generally one year. 6.1.2 Type inspection should be carried out in any of the following situations: When trial-making a new product 1
When the production process and its raw materials have changed significantly, when the product is resumed after a long period of suspension
—When the customer makes a request:
When the national quality supervision agency makes a request.
6.2 Determination of inspection results
6.2.1 When the results of all inspection items meet the requirements of this standard, the product is judged to be qualified. If one of the inspection results does not meet the requirements of this standard, the product is judged to be unqualified. 6.2.2 If there is any objection to the test result and a re-test is required, the re-test should be carried out on the original sealed sample or the prepared sample, and the judgment should be made according to the provisions of 6.2.1, and "re-test qualified" or "re-test unqualified" should be noted in the test report. 6.3 Test report
The test report should include the following contents:
6.3.1The number and name of this national standard:
6.3.2The name of the sample and other instructions,
6.3.3The test results and conclusions;
6.3.4Abnormal situations occurring during the test and other matters that need to be explained.The test pieces are fixed on the metal bracket without contact between the test pieces. The measuring device is placed at (20 ± 2) ℃ for 24 hours. Distilled water absorbs the formaldehyde released from the test piece. This solution is used as the test solution. 5.1.5.3 Quantitative method of formaldehyde concentration
Measure 10mL of acetylacetone (volume fraction is 0.4%) and 10m2L of ammonium acetate solution (mass fraction is 20%) in a 50mL stoppered conical flask, and then transfer 10mL of the test solution from the crystallized blood to the flask. Put the stopper on the bottle, spread it evenly, and then put it in a water tank at <40 ± 2) ℃ GB 18584—2001
Heat for 15 minutes, then let the yellow-green reaction solution stand in a dark place and cool to room temperature (18℃～28℃, about 1 hour). At 412nm on the spectrophotometer, use the steamed stuffing water as a reference drop and adjust to zero. Use a 5mm thick colorimetric blood to measure the absorbance A of the reaction solution. At the same time, use distilled water instead of the reaction solution to perform a blank test and determine the blank value as Ab. 5.1.5.4 Drawing of the standard curve
Draw the standard curve according to 4.11, 5.5, 2 of GB/T176571999. 5.1.5.5 Results and explanation
5.1.5.5. 1 The concentration of formaldehyde solution is calculated according to formula (1) with an accuracy of 0.1 mg/L. c=f× (A-A)
Formaldehyde concentration, in milligrams per liter (mg/L); fStandard curve slope, in milligrams per liter (mg/L) rA.—Absorbance of reaction solution;
A, absorbance of distilled water.
5. 2 Determination of soluble metal content
5.2.1 Principle
..--.(1)
The coating powder is treated with a certain concentration of dilute hydrochloric acid solution, and the heavy metal elements in the solution are determined by flame source atomic absorption spectrometry or flameless atomic absorption spectrometry.
5.2.2 Instruments
5.2.2.1 Stainless steel metal sieve: pore size 0.5mm5.2.2.2 Acidity meter: accuracy is ±0.2pH unit. 5.2.2.3 Filter membrane: pore size 0.45μm. 5.2.2.4 Magnetic stirrer: the outer layer of the stirrer should be plastic or glass. 5.2.2.5 Single scale pipette: 25ml
5.2.2.6 White volumetric flask: 50mL.
5.2.2.7 Scraper: A knife with a sharp blade. 5.2.3 Reagents
All reagents used are analytically pure, and the water used meets the requirements of grade 3 water in GB/T 6682-1992. 5.2.3.1 Hydrochloric acid solution
0. 07 mol/l., 1 mol/L. 2 mol/l. 5.2.3.2 Nitric acid solution
Mass fraction is 65%~~68%.
5.2.4 Preparation of coating powder
Use a scraper to scrape an appropriate amount of coating on the coating surface of the furniture product, and crush it with a magnetic stirrer at room temperature so that it can pass through a 0.5 mm metal sieve for processing.
5.2.5 Test steps
5.2.5.1 Sample treatment
Weigh 0.5 g (accurate to 0.0001 g) of the sieved powder sample, put it into a white volumetric flask, add 25 mL of 0.07 mol/L hydrochloric acid, stir for 1 min, and measure its acidity. If the pH is greater than 1.5, add 2 mol/L hydrochloric acid solution while shaking until the pH drops to 1.01.5. After stirring the mixture for 1 h at room temperature, let it stand for 1 h, then filter it immediately with a membrane filter and store it away from light.
The sample treatment should be completed within 4 h. If it is not completed within 4 h, add 25 mL of 1 Lol/L salt solution to treat the sample, and the treatment method is the same as above.
5.2.5.2 Determination of soluble metal content 5.2.5.2.1 The determination of soluble lead content shall be carried out in accordance with the requirements of Chapter 3 of GB/T9758.1-1988. 5.2.5.2.2 The determination of soluble cadmium content shall be carried out in accordance with the requirements of Chapter 3 of GB/T9758.4-1988. 5.2.5.2.3 The determination of soluble chromium content shall be carried out in accordance with GB/T9758.6-1988. 5.2.5.2.4 The determination of soluble mercury content shall be carried out in accordance with GB/T9758.7-1988. 5.2.5.3 Result calculation
The content of soluble heavy metals is calculated by formula (2), accurate to 0.1mg/kgC = (a - a) × 25 × F
C——soluble content of (lead, chromium, mercury), in milligrams per kilogram (mg/kg) GB 185B4-2001
as——blank concentration of 0.07mol or 1mol hydrochloric acid solution, in micrograms per milliliter (μg/nl), at——concentration of test solution (lead, chromium, mercury) measured from the standard curve, in micrograms per milliliter (μug/mL) F——dilution factor,
25——extracted hydrochloric acid drop, in milliliters (mL) m——sample volume weighed, in grams (g). 6 Inspection rules
6.1 All requirements listed in Chapter 4 of this standard are type inspection items. 6.1.1 Under normal production conditions, a periodic type inspection should be carried out regularly or after a certain amount of cumulative production. The cycle is generally one year. 6.1.2 Type inspection should be carried out in any of the following situations: When trial-making a new product 1
When the production process and its raw materials have changed significantly, when the product is resumed after a long period of suspension
—When the customer makes a request:
When the national quality supervision agency makes a request.
6.2 Determination of inspection results
6.2.1 When the results of all inspection items meet the requirements of this standard, the product is judged to be qualified. If one of the inspection results does not meet the requirements of this standard, the product is judged to be unqualified. 6.2.2 If there is any objection to the test result and a re-test is required, the re-test should be carried out on the original sealed sample or the prepared sample, and the judgment should be made according to the provisions of 6.2.1, and "re-test qualified" or "re-test unqualified" should be noted in the test report. 6.3 Test report
The test report should include the following contents:
6.3.1The number and name of this national standard:
6.3.2The name of the sample and other instructions,
6.3.3The test results and conclusions;
6.3.4Abnormal situations occurring during the test and other matters that need to be explained.7 Scraper: A knife with a sharp blade. 5.2.3 Reagents
All reagents used are analytically pure, and the water used meets the requirements of grade 3 water in GB/T 6682-1992. 5.2.3.1 Hydrochloric acid solution
0. 07 mol/l., 1 mol/L. 2 mol/l. 5.2.3.2 Nitric acid solution
Mass fraction is 65%~~68%.
5.2.4 Preparation of coating powder
Use a scraper to scrape an appropriate amount of coating on the coating surface of the furniture product, and crush it with a magnetic stirrer at room temperature so that it can pass through a 0.5 mm metal sieve for processing.
5.2.5 Test steps
5.2.5.1 Sample treatment
Weigh 0.5 g (accurate to 0.0001 g) of the sieved powder sample, put it into a white volumetric flask, add 25 mL of 0.07 mol/L hydrochloric acid, stir for 1 min, and measure its acidity. If the pH is greater than 1.5, add 2 mol/L hydrochloric acid solution while shaking until the pH drops to 1.01.5. After stirring the mixture for 1 h at room temperature, let it stand for 1 h, then filter it immediately with a membrane filter and store it away from light.
The sample treatment should be completed within 4 h. If it is not completed within 4 h, add 25 mL of 1 Lol/L salt solution to treat the sample, and the treatment method is the same as above.
5.2.5.2 Determination of soluble metal content 5.2.5.2.1 The determination of soluble lead content shall be carried out in accordance with the requirements of Chapter 3 of GB/T9758.1-1988. 5.2.5.2.2 The determination of soluble cadmium content shall be carried out in accordance with the requirements of Chapter 3 of GB/T9758.4-1988. 5.2.5.2.3 The determination of soluble chromium content shall be carried out in accordance with GB/T9758.6-1988. 5.2.5.2.4 The determination of soluble mercury content shall be carried out in accordance with GB/T9758.7-1988. 5.2.5.3 Result calculation
The content of soluble heavy metals is calculated by formula (2), accurate to 0.1mg/kgC = (a - a) × 25 × F
C——soluble content of (lead, chromium, mercury), in milligrams per kilogram (mg/kg) GB 185B4-2001
as——blank concentration of 0.07mol or 1mol hydrochloric acid solution, in micrograms per milliliter (μg/nl), at——concentration of test solution (lead, chromium, mercury) measured from the standard curve, in micrograms per milliliter (μug/mL) F——dilution factor,
25——extracted hydrochloric acid drop, in milliliters (mL) m——sample volume weighed, in grams (g). 6 Inspection rules
6.1 All requirements listed in Chapter 4 of this standard are type inspection items. 6.1.1 Under normal production conditions, a periodic type inspection should be carried out regularly or after a certain amount of cumulative production. The cycle is generally one year. 6.1.2 Type inspection should be carried out in any of the following situations: When trial-making a new product 1
When the production process and its raw materials have changed significantly, when the product is resumed after a long period of suspension
—When the customer makes a request:
When the national quality supervision agency makes a request.
6.2 Determination of inspection results
6.2.1 When the results of all inspection items meet the requirements of this standard, the product is judged to be qualified. If one of the inspection results does not meet the requirements of this standard, the product is judged to be unqualified. 6.2.2 If there is any objection to the test result and a re-test is required, the re-test should be carried out on the original sealed sample or the prepared sample, and the judgment should be made according to the provisions of 6.2.1, and "re-test qualified" or "re-test unqualified" should be noted in the test report. 6.3 Test report
The test report should include the following contents:
6.3.1The number and name of this national standard:
6.3.2The name of the sample and other instructions,
6.3.3The test results and conclusions;
6.3.4Abnormal situations occurring during the test and other matters that need to be explained.7 Scraper: A knife with a sharp blade. 5.2.3 Reagents
All reagents used are analytically pure, and the water used meets the requirements of grade 3 water in GB/T 6682-1992. 5.2.3.1 Hydrochloric acid solution
0. 07 mol/l., 1 mol/L. 2 mol/l. 5.2.3.2 Nitric acid solution
Mass fraction is 65%~~68%.
5.2.4 Preparation of coating powderwww.bzxz.net
Use a scraper to scrape an appropriate amount of coating on the coating surface of the furniture product, and crush it with a magnetic stirrer at room temperature so that it can pass through a 0.5 mm metal sieve for processing.
5.2.5 Test steps
5.2.5.1 Sample treatment
Weigh 0.5 g (accurate to 0.0001 g) of the sieved powder sample, put it into a white volumetric flask, add 25 mL of 0.07 mol/L hydrochloric acid, stir for 1 min, and measure its acidity. If the pH is greater than 1.5, add 2 mol/L hydrochloric acid solution while shaking until the pH drops to 1.01.5. After stirring the mixture for 1 h at room temperature, let it stand for 1 h, then filter it immediately with a membrane filter and store it away from light.
The sample treatment should be completed within 4 h. If it is not completed within 4 h, add 25 mL of 1 Lol/L salt solution to treat the sample, and the treatment method is the same as above.
5.2.5.2 Determination of soluble metal content 5.2.5.2.1 The determination of soluble lead content shall be carried out in accordance with the requirements of Chapter 3 of GB/T9758.1-1988. 5.2.5.2.2 The determination of soluble cadmium content shall be carried out in accordance with the requirements of Chapter 3 of GB/T9758.4-1988. 5.2.5.2.3 The determination of soluble chromium content shall be carried out in accordance with GB/T9758.6-1988. 5.2.5.2.4 The determination of soluble mercury content shall be carried out in accordance with GB/T9758.7-1988. 5.2.5.3 Result calculation
The content of soluble heavy metals is calculated by formula (2), accurate to 0.1mg/kgC = (a - a) × 25 × F
C——soluble content of (lead, chromium, mercury), in milligrams per kilogram (mg/kg) GB 185B4-2001
as——blank concentration of 0.07mol or 1mol hydrochloric acid solution, in micrograms per milliliter (μg/nl), at——concentration of test solution (lead, chromium, mercury) measured from the standard curve, in micrograms per milliliter (μug/mL) F——dilution factor,
25——extracted hydrochloric acid drop, in milliliters (mL) m——sample volume weighed, in grams (g). 6 Inspection rules
6.1 All requirements listed in Chapter 4 of this standard are type inspection items. 6.1.1 Under normal production conditions, a periodic type inspection should be carried out regularly or after a certain amount of cumulative production. The cycle is generally one year. 6.1.2 Type inspection should be carried out in any of the following situations: When trial-making a new product 1
When the production process and its raw materials have changed significantly, when the product is resumed after a long period of suspension
—When the customer makes a request:
When the national quality supervision agency makes a request.
6.2 Determination of inspection results
6.2.1 When the results of all inspection items meet the requirements of this standard, the product is judged to be qualified. If one of the inspection results does not meet the requirements of this standard, the product is judged to be unqualified. 6.2.2 If there is any objection to the test result and a re-test is required, the re-test should be carried out on the original sealed sample or the prepared sample, and the judgment should be made according to the provisions of 6.2.1, and "re-test qualified" or "re-test unqualified" should be noted in the test report. 6.3 Test report
The test report should include the following contents:
6.3.1The number and name of this national standard:
6.3.2The name of the sample and other instructions,
6.3.3The test results and conclusions;
6.3.4Abnormal situations occurring during the test and other matters that need to be explained.
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