Some standard content:
Record number: 2767-1999
HG/T2962-1999
This standard mainly refers to the original chemical industry standard HG/T2962-1986 "Industrial Manganese Sulfate" and is formulated based on the current domestic production situation and user requirements.
Compared with HG/T2962-1986, this standard has been modified as follows: 1 The main content of manganese sulfate in terms of Mn has been added, which is required by most users. 2 The chloride index has been slightly relaxed, which reduces the production cost without affecting the use. The test method has been changed from potentiometric titration to silver chloride ratio method, which is simple and accurate to operate. 3 The pH value index range has been appropriately adjusted to make it more in line with the characteristics of the product itself and conducive to industrial production control. From the date of entry into force of this standard, it will replace HG/T2962-1986. This standard was proposed by the Technical Supervision Department of the former Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the inorganic salt product standardization technical unit of the Ministry of Chemical Industry. This standard was drafted by: Tianjin Chemical Research Institute of the Ministry of Chemical Industry, Changsha Xuhua Chemical Plant, Changsha Yanjiang Chemical Plant. The main drafters of this standard are: Fan Guoqiang, Xie Zhiqiang, Zhao Xingnian. This standard was first issued as a national standard in May 1986, and was adjusted from a national standard to a recommended chemical industry standard in 1992. This standard is entrusted to the technical unit responsible for standardization of inorganic salt products of the Ministry of Chemical Industry for interpretation. 900
1 Scope
Chemical Industry Standard of the People's Republic of China
Industrial manganese sulfate
Manganous sulphate for industrial useHG/T 2962—1999
Replaces HG/T2962-1986
This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation and storage of industrial manganese sulfate. This standard applies to industrial manganese sulfate, which is mainly used as a synthetic raw material for inks, paints, and coating driers, a catalyst for the synthesis of fatty acids, and other manganese salt raw materials.
Molecular formula: MnSO.·H20
Relative molecular mass: 169.01 (according to the 1995 international relative atomic mass) 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 601---1988
GB/T 602---1988
GB/T 603-—1988
GB/T 1250—1989
GB/T 3049—1986
Chemical reagents-Preparation of standard solutions for titration analysis (volumetric analysis) Chemical reagents
Preparation of standard solutions for determination of impurities (negISO6353-1:1982) Preparation of preparations and products used in test methods (negISO6353-1:1982) Chemical reagents
Methods for expressing and determining limit values General method for determination of iron content in chemical products-O-phenanthroline spectrophotometric method (neqISO6685:1982) GB/T 6678—1986
GB/T 6682—1992
GB/T 8946-1988
3 Requirements
General rules for sampling of chemical products
Specifications and test methods for water used in analytical laboratories (eqvISO3696:1987) Plastic woven bags
3.1 Appearance: White, slightly pink crystalline powder. Industrial manganese sulfate shall meet the requirements of Table 1.
Table 1 Requirements
Indicator Item
Manganese sulfate (MnSO·HzO)/%
(As Mn)/%
Iron (Fe)/%
Chloride (CI)/%
Water-insoluble matter/%
Approved by the State Administration of Petroleum and Chemical Industry on April 20, 1999
Implementation on April 1, 2000
4 Test method
HG/T 2962—1999
The reagents and water used in this standard refer to analytical pure reagents and grade 3 water specified in GB/T6682 unless otherwise specified. The standard titration solutions, impurity standard solutions, preparations and products used in the test, unless otherwise specified, shall be prepared in accordance with the provisions of GB/T601, GB/T602 and GB/T603.
4.1 Determination of manganese sulfate content
4.1.1 Summary of the method
In phosphoric acid medium, use ammonium nitrate to quantitatively oxidize the divalent manganese in the sample to trivalent manganese at 220℃~240℃, and use N-phenylanthranilic acid as an indicator and titrate with ammonium ferrous sulfate standard titration solution. 4.1.2 Reagents and materials
4.1.2.1 Phosphoric acid.
4.1.2.2 Ammonium nitrate.
4.1.2.3 Anhydrous sodium carbonate.
4.1.2.4 N-phenylanthranilic acid indicator solution: 2g/L solution. Weigh 0.2g N-phenylated anthranilic acid, dissolve it in a small amount of water, add 0.2g anhydrous sodium carbonate, heat at low temperature to dissolve, add water to 100mL, and shake. Sulfur-phosphorus mixed acid: slowly add 150mL sulfuric acid and 150mL phosphoric acid to 700mL water, shake well, and cool. 4. 1.2.5
4.1.2.6 Potassium dichromate standard solution: c(1/6K,Cr20,) is about 0.1mol/L. Accurately weigh about 4.9g (accurate to 0.0002g) of the standard potassium dichromate dried to constant weight at 120℃. Place it in a 1000mL volumetric flask, add appropriate amount of water to dissolve, dilute to the scale, and shake well. Ammonium ferrous sulfate standard titration solution: c[Fe(NH.) (SO.) 21 is about 0.1mol/I. The calibration of the standard titration solution of ammonium ferrous sulfate 4.1.2.7
should be carried out simultaneously with the determination of the sample. Preparation: Weigh 40g of ammonium ferrous sulfate, dissolve it in 300mL (1+4) sulfuric acid solution, add 700ml of water, and shake to hook. Calibration: Pipette 25mL of potassium dichromate standard solution, add 10mL of sulfuric acid and phosphorus mixed acid, and add water to 100mL. Titrate with the standard titration solution of ammonium ferrous sulfate until the orange-yellow color disappears. Add 2 drops of N-phenylanthranilic acid indicator solution and continue titrating until the solution turns bright green, which is the end point. The molar concentration c of the standard titration solution of ammonium ferrous sulfate is calculated according to formula (1): Vim
C= 49.03 V
wherein. m---the actual mass of potassium dichromate. g; 49.03--the molar mass of potassium dichromate (1/6KzCr.O,), gVi----the volume of the standard potassium dichromate solution transferred, mI.; --the volume of the standard titration solution of ammonium ferrous sulfate consumed in the titration, mL. 4.1.3 Analysis steps
Weigh about 0.5g of the sample (accurate to 0.0002g). Place it in a 500ml conical flask and moisten it with a small amount of water. Add 20mL of phosphoric acid, shake it and heat it to boil until the liquid surface is calm and white smoke is emitted slightly (the temperature is 220℃～240℃ at this time), remove it from the heat source, immediately add 2g of ammonium nitrate and shake it thoroughly to let the yellow smoke escape. After cooling to about 70°C, add 100 mL of water, shake thoroughly to dissolve the salts, and cool to room temperature. Titrate with ammonium ferrous sulfate standard titration solution until it turns light red, add 2 drops of N-phenylanthranilic acid indicator solution, and continue titrating until the solution changes from red to bright yellow, which is the end point.
4.1.4 Expression of analysis results
The content of manganese sulfate (MnSO4·HzO) expressed as mass percentage (X,) is calculated according to formula (2): Xf = V×0.169 0
2×100=×16. 9
The content of manganese sulfate (in terms of Mn) expressed as mass percentage (X,) is calculated according to formula (3): V×0. 054 94 ×100 = V×5. 494X2=
Wu Zhong: The actual concentration of c-—~-ammonium ferrous sulfate standard titration solution, mol/L; 902
HG/T 2962—1999
The volume of standard ammonium ferrous sulfate solution consumed in the titration, mL; the mass of the sample, g;
The mass of manganese sulfate equivalent to 1.00mL standard ammonium ferrous sulfate solution (c[Fe(NH,)2（SO.)2］=1.000mol/L) in grams;
The mass of manganese equivalent to 1.00mL standard ammonium ferrous sulfate solution (c[Fe(NH,)2（SO4)2］1.000mol/L) in grams.
4.1.5 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference between the two parallel determination results shall not exceed 0.5% (not more than 0.2% in terms of manganese).
4.2 Determination of iron content
4.2.1 Summary of the method
Same as Chapter 2 of GB/T3049-1986.
4.2.2 Reagents and materials
Same as Chapter 3 of GB/T3049-1986.
4.2.3 Instruments and equipment
Same as Chapter 4 of GB/T3049-1986.
4.2.4 Analysis steps
4.2.4.1 Drawing of working curve
Draw the working curve according to the provisions of 5.3 of GB/T3049-1986 using a 3 cm absorption cell and the corresponding amount of iron standard solution. 4.2.4.2 Preparation of test solution
Weigh about 1g of sample (accurate to 0.01g) and place it in a 100ml beaker. Add a small amount of water to moisten it, add 5ml of hydrochloric acid, boil and dissolve, cool to room temperature, and transfer all of it to a 100ml volumetric flask. 4.2.4.3 Preparation of blank test solution
Except for not adding sample, the rest is the same as the preparation of test solution. 4.2.4.4 Determination
According to the provisions of 5.4 of GB/T3049--1986, operate the test solution and blank test solution starting from "add water to about 60mL when necessary".
4.2.5 Expression of analysis results
The iron (Fe) content (X:) expressed as mass percentage is calculated according to formula (4): X = (m-mo)×10-
× 100 —
Wherein: ml-
(mr-mo)
-the amount of iron found from the working curve according to the measured absorbance of the test solution, mg; the amount of iron found from the working curve according to the measured absorbance of the blank test solution, mg; the mass of the sample, g.
4.2.6 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference between the two parallel determination results shall not exceed 0.001%. 4.3 Determination of chloride content
4.3.1 Method summary
(4)
In a nitric acid medium, add silver nitrate solution to react with chloride ions in the solution to form insoluble silver chloride, making the solution turbid. Use visual turbidimetry to conduct limit test.
4.3.2 Reagents and materials
4.3.2.1 Nitric acid solution: 1+2;
4.3.2.2 Silver nitrate solution: 17g/L;
HG/T 2962--1999
4.3.2.3 Chloride standard solution: 1mL contains 0.1mgCl. 4.3.3 Instruments and equipment
Colorimetric tube: 50mlL, with 25mL scale.
4.3.4 Analysis steps
Weigh (1.0±0.1)g of sample, place in a colorimetric tube, add water to dissolve, and dilute to 25mL. Add 2mL nitric acid solution and 1mL silver nitrate solution. Shake well. Leave for 10 min. The turbidity should not be greater than the standard. The standard is to take 0.5mL of chloride standard solution and treat it in the same way as the sample. 4.4 Determination of water-insoluble matter content
4.4.1 Reagents and materials
Barium chloride solution: 100g/L.
4.4.2 Instruments and equipment
Glass sand: filter plate pore size 5μm~15μm. 4.4.3 Analysis steps
Weigh about 10g of sample (accurate to 0.01g). Place in a 150mL beaker. Add 100mL boiling water to remove carbon dioxide to dissolve. Filter with a glass crucible that has been dried to constant weight at 105℃～110℃, wash with hot water until there is no silver sulfate (check with barium chloride solution), and dry at 105℃～110℃ to constant weight. 4.4.4 Expression of analysis results
The water-insoluble content (X,) expressed as mass percentage is calculated according to formula (5): Xa=m=m2×100
Where: m——mass of glass crucible and water-insoluble matter, g; m2——mass of glass crucible, g;
m—mass of sample, g.
4.4.5 Allowable difference
Take the arithmetic mean of the parallel determination results as the determination result. The absolute difference of the parallel determination results shall not exceed 0.01%. 4.5 Determination of pH value
4.5.1 Summary of method
Dissolve the sample in a certain amount of water and determine the pH value of the solution with an acidometer. 4.5.2 Instruments and equipment
Acidometer: the scale value is 0.2 pH unit, equipped with pH electrode and calomel electrode. 4.5.3 Analysis steps
Weigh (5.0 ± 0.1) g of sample, dissolve in 50 mL of freshly boiled water, cool, and use the acidometer to determine the pH value. 4.5.4 Allowable difference
Take the arithmetic mean of the parallel determination results as the determination result. The absolute difference of the parallel determination results shall not exceed 0.2 pH. 5 Inspection rules
5.1 All items specified in this standard are factory inspection items. 5.2 Each batch of products shall not exceed 50 tons.
+**·(5)
5.3 Determine the number of sampling units in accordance with 6.6 of GB/T6678-1986. Each packaging bag is a sampling unit. When sampling, use a sampler to obliquely insert from the top of the packaging bag to three-quarters of the material layer to collect samples. Mix the samples evenly. Use the quartering method to reduce them to about 500g, and immediately put them into two clean, dry wide-mouth bottles and seal them. Stick labels on the bottles, indicating the manufacturer's name, product name, batch number, sampling date and the name of the sampler. One bottle is used as a laboratory sample, and the other bottle is kept for three months for reference. 5.4 Industrial manganese sulfate shall be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer shall ensure that each batch of products shipped from the factory meets the requirements of this standard. If one of the indicators in the test results does not meet the requirements of this standard, the sample should be re-sampled from twice the amount of packaging for re-testing. Even if only one indicator in the re-test results does not meet the requirements of this standard, the entire batch of products shall be unqualified. 5.5 Determine whether the test results meet the standards by the rounded value comparison method specified in 5.2 of GB/T1250-1989. 6 Marking, packaging, transportation, storage
6.1 The packaging of industrial manganese sulfate should be firmly and clearly marked, including the manufacturer's name, address, product name, trademark, net content, and the number of this standard.
6.2 Each batch of products shipped out of the factory should have a quality certificate. The content includes the manufacturer's name, address, product name, trademark, net content, batch number or production date, proof that the product quality meets this standard, and the number of this standard. 6.3 Industrial manganese sulfate is packaged in plastic woven bags. Lined with a layer of polyethylene film bag, the thickness is not less than 0.07mm. The outer bag is a polyethylene plastic woven bag packaging, which meets the corresponding model requirements specified in GB/T8946. The net content of each bag is 25kg and 50kg. 6.4 The inner bag is tied with vinyl rope or rope of equivalent quality, or sealed with other equivalent methods; the outer bag is folded at a distance of not less than 30mm from the bag edge, and the edge is sewn with vinyl thread or other thread of equivalent quality at a distance of not less than 15mm from the bag edge, with uniform stitch length, and no leakage or skipping.
6.5 Industrial manganese sulfate products should be protected from sunlight and rain during transportation and storage. 905ml-
(mr -- mo)
-The amount of iron found from the working curve according to the measured absorbance of the test solution, mg; The amount of iron found from the working curve according to the measured absorbance of the blank test solution, mg; The mass of the sample, g.
4.2.6 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference between the two parallel determination results shall not exceed 0.001%. 4.3 Determination of chloride content
4.3.1 Method summary
(4)
In a nitric acid medium, add silver nitrate solution to react with chloride ions in the solution to form insoluble silver chloride, making the solution turbid. Use visual turbidimetry for limit inspection.
4.3.2 Reagents and materials
4.3.2.1 Nitric acid solution: 1+2;
4.3.2.2 Silver nitrate solution: 17g/L;
HG/T 2962--1999
4.3.2.3 Chloride standard solution: 1mL contains 0.1mgCl. 4.3.3 Instruments and equipment
Colorimetric tube: 50mlL, with 25mL scale.
4.3.4 Analysis steps
Weigh (1.0±0.1)g of sample, place it in a colorimetric tube, add water to dissolve, and dilute to 25mL. Add 2mL nitric acid solution and 1mL silver nitrate solution. Shake well. Let stand for 10 min. The turbidity should not be greater than the standard. The standard is to take 0.5mL of chloride standard solution and treat it in the same way as the sample. 4.4 Determination of water-insoluble matter content
4.4.1 Reagents and materials
Barium chloride solution: 100g/L.
4.4.2 Instruments and equipment
Glass sand: filter plate pore size 5μm~15μm. 4.4.3 Analysis steps
Weigh about 10g of sample (accurate to 0.01g). Place in a 150mL beaker. Add 100mL boiling water to remove carbon dioxide to dissolve. Filter with a glass sand crucible that has been dried to constant weight at 105℃~110℃, wash with hot water until there is no silver sulfate (check with barium chloride solution), and dry at 105℃~110℃ to constant weight. 4.4.4 Expression of analysis results
The water-insoluble content (X,) expressed as a mass percentage is calculated according to formula (5): Xa=m=m2×100
Wherein: m——mass of glass crucible and water-insoluble matter, g; m2——mass of glass crucible, g;
m—mass of sample, g.
4.4.5 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference of the parallel determination results shall not exceed 0.01%. 4.5 Determination of pH value
4.5.1 Summary of method
Dissolve the sample in a certain amount of water and use an acidometer to determine the pH value of the solution. 4.5.2 Instruments and equipment
Acidometer: The graduation value is 0.2 pH unit, equipped with pH electrode and calomel electrode. 4.5.3 Analysis steps
Weigh (5.0±0.1)g of sample and dissolve it in 50mL of freshly boiled water. After cooling, use an acidometer to determine the pH value. 4.5.4 Allowable difference
Take the arithmetic mean of the parallel determination results as the determination result. The absolute difference of the parallel determination results shall not exceed 0.2pH. 5 Inspection rules
5.1 All items specified in this standard are factory inspection items. 5.2 Each batch of products shall not exceed 50t.
+**·(5)
5.3 Determine the number of sampling units in accordance with 6.6 of GB/T6678-1986. Each packaging bag is a sampling unit. When sampling, use a sampler to insert obliquely from the top of the packaging bag to three-quarters of the material layer to collect samples. Mix the samples taken evenly. Use the quartering method to reduce to about 500g, and immediately put it into two clean, dry wide-mouth bottles and seal them. Stick labels on the bottles, indicating the manufacturer name, product name, batch number, sampling date and name of the sampler. One bottle is used as a laboratory sample, and the other bottle is kept for three months for reference. 5.4 Industrial manganese sulfate shall be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer shall ensure that each batch of products shipped from the factory 904
HG/T2962--1999
meets the requirements of this standard. If one of the indicators in the test results does not meet the requirements of this standard, the sample should be re-sampled from twice the amount of packaging for re-testing. Even if only one indicator in the re-test results does not meet the requirements of this standard, the entire batch of products shall be unqualified. 5.5 Determine whether the test results meet the standards by the rounded value comparison method specified in 5.2 of GB/T1250-1989. 6 Marking, packaging, transportation, storage
6.1 The packaging of industrial manganese sulfate should be firmly and clearly marked, including the manufacturer's name, address, product name, trademark, net content, and the number of this standard.
6.2 Each batch of products shipped out of the factory should have a quality certificate. The content includes the manufacturer's name, address, product name, trademark, net content, batch number or production date, proof that the product quality meets this standard, and the number of this standard. 6.3 Industrial manganese sulfate is packaged in plastic woven bags. Lined with a layer of polyethylene film bag, the thickness is not less than 0.07mm. The outer bag is a polyethylene plastic woven bag packaging, which meets the corresponding model requirements specified in GB/T8946. The net content of each bag is 25kg and 50kg. 6.4 The inner bag is tied with vinyl rope or rope of equivalent quality, or sealed with other equivalent methods; the outer bag is folded at a distance of not less than 30mm from the bag edge, and the edge is sewn with vinyl thread or other thread of equivalent quality at a distance of not less than 15mm from the bag edge, with uniform stitch length, and no leakage or skipping.
6.5 Industrial manganese sulfate products should be protected from sunlight and rain during transportation and storage. 905ml-
(mr -- mo)
-The amount of iron found from the working curve according to the measured absorbance of the test solution, mg; The amount of iron found from the working curve according to the measured absorbance of the blank test solution, mg; The mass of the sample, g.
4.2.6 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference between the two parallel determination results shall not exceed 0.001%. 4.3 Determination of chloride content
4.3.1 Method summary
(4)
In a nitric acid medium, add silver nitrate solution to react with chloride ions in the solution to form insoluble silver chloride, making the solution turbid. Use visual turbidimetry for limit inspection.
4.3.2 Reagents and materials
4.3.2.1 Nitric acid solution: 1+2;
4.3.2.2 Silver nitrate solution: 17g/L;
HG/T 2962--1999
4.3.2.3 Chloride standard solution: 1mL contains 0.1mgCl. 4.3.3 Instruments and equipment
Colorimetric tube: 50mlL, with 25mL scale.
4.3.4 Analysis steps
Weigh (1.0±0.1)g of sample, place it in a colorimetric tube, add water to dissolve, and dilute to 25mL. Add 2mL nitric acid solution and 1mL silver nitrate solution. Shake well. Let stand for 10 min. The turbidity should not be greater than the standard. The standard is to take 0.5mL of chloride standard solution and treat it in the same way as the sample. 4.4 Determination of water-insoluble matter content
4.4.1 Reagents and materials
Barium chloride solution: 100g/L.
4.4.2 Instruments and equipment
Glass sand: filter plate pore size 5μm~15μm. 4.4.3 Analysis steps
Weigh about 10g of sample (accurate to 0.01g). Place in a 150mL beaker. Add 100mL boiling water to remove carbon dioxide to dissolve. Filter with a glass sand crucible that has been dried to constant weight at 105℃~110℃, wash with hot water until there is no silver sulfate (check with barium chloride solution), and dry at 105℃~110℃ to constant weight. 4.4.4 Expression of analysis results
The water-insoluble content (X,) expressed as a mass percentage is calculated according to formula (5): Xa=m=m2×100
Wherein: m——mass of glass crucible and water-insoluble matter, g; m2——mass of glass crucible, g;
m—mass of sample, g.
4.4.5 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference of the parallel determination results shall not exceed 0.01%. 4.5 Determination of pH value
4.5.1 Summary of method
Dissolve the sample in a certain amount of water and use an acidometer to determine the pH value of the solution. 4.5.2 Instruments and equipment
Acidometer: The graduation value is 0.2 pH unit, equipped with pH electrode and calomel electrode. 4.5.3 Analysis steps
Weigh (5.0±0.1)g of sample and dissolve it in 50mL of freshly boiled water. After cooling, use an acidometer to determine the pH value. 4.5.4 Allowable difference
Take the arithmetic mean of the parallel determination results as the determination result. The absolute difference of the parallel determination results shall not exceed 0.2pH. 5 Inspection rules
5.1 All items specified in this standard are factory inspection items. 5.2 Each batch of products shall not exceed 50t.
+**·(5)
5.3 Determine the number of sampling units in accordance with 6.6 of GB/T6678-1986. Each packaging bag is a sampling unit. When sampling, use a sampler to insert obliquely from the top of the packaging bag to three-quarters of the material layer to collect samples. Mix the samples taken evenly. Use the quartering method to reduce to about 500g, and immediately put it into two clean, dry wide-mouth bottles and seal them. Stick labels on the bottles, indicating the manufacturer name, product name, batch number, sampling date and name of the sampler. One bottle is used as a laboratory sample, and the other bottle is kept for three months for reference. 5.4 Industrial manganese sulfate shall be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer shall ensure that each batch of products shipped from the factory 904
HG/T2962--1999
meets the requirements of this standard. If one of the indicators in the test results does not meet the requirements of this standard, the sample should be re-sampled from twice the amount of packaging for re-testing. Even if only one indicator in the re-test results does not meet the requirements of this standard, the entire batch of products shall be unqualified. 5.5 Determine whether the test results meet the standards by the rounded value comparison method specified in 5.2 of GB/T1250-1989. 6 Marking, packaging, transportation, storage
6.1 The packaging of industrial manganese sulfate should be firmly and clearly marked, including the manufacturer's name, address, product name, trademark, net content, and the number of this standard.
6.2 Each batch of products shipped out of the factory should have a quality certificate. The content includes the manufacturer's name, address, product name, trademark, net content, batch number or production date, proof that the product quality meets this standard, and the number of this standard. 6.3 Industrial manganese sulfate is packaged in plastic woven bags. Lined with a layer of polyethylene film bag, the thickness is not less than 0.07mm. The outer bag is a polyethylene plastic woven bag packaging, which meets the corresponding model requirements specified in GB/T8946. The net content of each bag is 25kg and 50kg. 6.4 The inner bag is tied with vinyl rope or rope of equivalent quality, or sealed with other equivalent methods; the outer bag is folded at a distance of not less than 30mm from the bag edge, and the edge is sewn with vinyl thread or other thread of equivalent quality at a distance of not less than 15mm from the bag edge, with uniform stitch length, and no leakage or skipping.
6.5 Industrial manganese sulfate products should be protected from sunlight and rain during transportation and storage. 9051 All items specified in this standard are factory inspection items. 5.2 Each batch of products shall not exceed 50t.
+**·(5)
5.3 Determine the number of sampling units in accordance with 6.6 of GB/T6678-1986. Each packaging bag is a sampling unit. When sampling, use a sampler to obliquely insert from the top of the packaging bag to three-quarters of the material layer to sample. Mix the sample evenly. Use the quartering method to reduce it to about 500g, and immediately put it into two clean, dry wide-mouth bottles and seal them. Stick labels on the bottles, indicating the manufacturer name, product name, batch number, sampling date and name of the sampler. One bottle is used as a laboratory sample, and the other bottle is kept for three months for reference. 5.4 Industrial manganese sulfate shall be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer shall ensure that each batch of products shipped out of the factory 904
HG/T2962--1999www.bzxz.net
meets the requirements of this standard. If one of the test results does not meet the requirements of this standard, the sample should be re-tested from twice the amount of packaging. Even if only one of the retest results does not meet the requirements of this standard, the entire batch of products shall be unqualified. 5.5 Determine whether the test results meet the standards according to the rounded value comparison method specified in 5.2 of GB/T1250-1989. 6 Marking, packaging, transportation, storage
6.1 The packaging of industrial manganese sulfate should have firm and clear markings, including the manufacturer's name, address, product name, trademark, net content, and this standard number.
6.2 Each batch of products shipped from the factory should have a quality certificate. The content includes the manufacturer's name, address, product name, trademark, net content, batch number or production date, proof that the product quality meets this standard, and this standard number. 6.3 Industrial manganese sulfate is packaged in plastic woven bags. Lined with a layer of polyethylene film bag, the thickness is not less than 0.07mm. The outer bag is a polyethylene plastic woven bag packaging, which meets the corresponding model requirements specified in GB/T8946. The net content of each bag is 25kg or 50kg. 6.4 The inner bag is tied with vinyl rope or rope of equivalent quality, or sealed with other equivalent methods; the outer bag is folded at a distance of not less than 30mm from the bag edge, and the edge is sewn with vinyl thread or other thread of equivalent quality at a distance of not less than 15mm from the bag edge, with uniform stitch length, and no leakage or skipping.
6.5 Industrial manganese sulfate products should be protected from sunlight and rain during transportation and storage. 9051 All items specified in this standard are factory inspection items. 5.2 Each batch of products shall not exceed 50t.
+**·(5)
5.3 Determine the number of sampling units in accordance with 6.6 of GB/T6678-1986. Each packaging bag is a sampling unit. When sampling, use a sampler to obliquely insert from the top of the packaging bag to three-quarters of the material layer to sample. Mix the sample evenly. Use the quartering method to reduce it to about 500g, and immediately put it into two clean, dry wide-mouth bottles and seal them. Stick labels on the bottles, indicating the manufacturer name, product name, batch number, sampling date and name of the sampler. One bottle is used as a laboratory sample, and the other bottle is kept for three months for reference. 5.4 Industrial manganese sulfate shall be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer shall ensure that each batch of products shipped out of the factory 904
HG/T2962--1999
meets the requirements of this standard. If one of the test results does not meet the requirements of this standard, the sample should be re-tested from twice the amount of packaging. Even if only one of the retest results does not meet the requirements of this standard, the entire batch of products shall be unqualified. 5.5 Determine whether the test results meet the standards according to the rounded value comparison method specified in 5.2 of GB/T1250-1989. 6 Marking, packaging, transportation, storage
6.1 The packaging of industrial manganese sulfate should have firm and clear markings, including the manufacturer's name, address, product name, trademark, net content, and this standard number.
6.2 Each batch of products shipped from the factory should have a quality certificate. The content includes the manufacturer's name, address, product name, trademark, net content, batch number or production date, proof that the product quality meets this standard, and this standard number. 6.3 Industrial manganese sulfate is packaged in plastic woven bags. Lined with a layer of polyethylene film bag, the thickness is not less than 0.07mm. The outer bag is a polyethylene plastic woven bag packaging, which meets the corresponding model requirements specified in GB/T8946. The net content of each bag is 25kg or 50kg. 6.4 The inner bag is tied with vinyl rope or rope of equivalent quality, or sealed with other equivalent methods; the outer bag is folded at a distance of not less than 30mm from the bag edge, and the edge is sewn with vinyl thread or other thread of equivalent quality at a distance of not less than 15mm from the bag edge, with uniform stitch length, and no leakage or skipping.
6.5 Industrial manganese sulfate products should be protected from sunlight and rain during transportation and storage. 905
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