Some standard content:
Record number: 10089-2002
HG2938—2001
The arsenic and lead indicators in Table 1 of this standard are mandatory, and the other indicators are recommended. 4.4 and 4.5 of this standard are mandatory, and the rest are recommended.
This standard is a revision of the mandatory chemical industry standard HG2938—1987 "Feed Grade Cobalt Nitride". The main technical differences between this standard and HG2938-—1987 are: the cobalt content (Co) indicator is adjusted from 24.3% to 24.0%; the cobalt chloride content (CoCl2·6HzO) is adjusted from 98.0% to 96. 8%.
The determination of the content of the monument has been increased by the silver salt method, and this method is used as the arbitration method. The determination of the lead content adopts the determination method of lead in feed. This standard will replace HG2938-1987 from the date of implementation. This standard was proposed by the Policy and Regulations Department of the former State Administration of Petroleum and Chemical Industry. This standard is under the jurisdiction of the technical unit responsible for standardization of inorganic salt products in the chemical industry. The drafting units of this standard are: Tianjin Chemical Research and Design Institute, Xiongxian Chemical General Plant of Sinochem Hebei Group. The main drafters of this standard are: Li Guangming, Wang Xingtian, and Yang Hewen. This standard was first issued as a national standard in 1987, adjusted to a chemical industry standard in 1992, and converted into a mandatory chemical industry standard in 1997, and renumbered as HG2938-1987. This standard is entrusted to the technical unit responsible for standardization of inorganic salt products in the chemical industry for interpretation. 862
1Scope
Chemical Industry Standard of the People's Republic of China
Feed grade
Cobalt chloride
Feed gradeCobalt chloride
HG 2938—2001
Replaces HG2938—1987
This standard specifies the requirements, test methods, inspection rules, and marking, labeling, packaging, transportation, and storage of feed grade cobalt chloride. This standard applies to feed grade cobalt chloride. This product is used as a supplement of cobalt in feed after premixing. Molecular formula: CoCl2·6H,0
Relative molecular mass: 237.93 (according to the 1999 international relative atomic mass) 2Cited 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 are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T601—1988 Preparation of standard solutions for chemical reagent titration analysis (volumetric analysis) GB/T 602—1988 Preparation of standard solutions for determination of impurities in chemical reagents (neqISO6353-1:1982) GB/T603--1988 Preparation of preparations and products used in test methods for chemical reagents (neqISO6353-1:1982) GB/T610.1-1988 General method for determination of arsenic in chemical reagents (spot method) GB/T 6003. 1—1997 GB/T 6678—1986 GB/T 66821992 GB 10648--1999
Wire mesh test sieve
General rules for sampling of chemical products
Specifications and test methods for water used in analytical laboratories (egyISO3696:1987)Feed label
GB/T 13079--1999
GB/T 13080-1991
3 Requirements
Determination of total arsenic in feed
Determination method of lead in feed
Appearance: This product is red or reddish purple crystals. 3.1
Feed grade cobalt chloride should meet the requirements of Table 1,
Table 1 requirements
Mass fraction of cobalt chloride (CoCl2·6HzO)Mass fraction of cobalt (Co)
Water insoluble matter
Mass fraction of iodine (As)
Mass fraction of lead (Pb)
Fineness, passing 800μm test sieve
Note: As and Pb are mandatory indicators, and the rest are recommended indicators. Approved by the State Economic and Trade Commission on January 24, 2002
Implementation on July 1, 2002
4 Test methods
HG 2938—2001
The reagents and water used in this standard, unless otherwise specified, refer to analytical reagents and grade 3 water specified in GB/T6682. The standard titration solution, impurity standard solution, preparation 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. Safety Tips: The hydrochloric acid used in the test is corrosive and should be handled with caution. If splashed on the skin, rinse with water immediately. 4.1 Identification
4.1.1 Reagents and Materials
4.1.1.1 Hydrochloric acid solution: 2+1.
4.1.1.2 Silver nitrate solution: 17g/L.
4.1.1.3 Acetic acid-sodium acetate buffer solution: weigh 2.7g sodium acetate, add 60mL glacial acetic acid and dissolve in 100mL water. 4.1.1.4 Cobalt reagent (4-[(5-chloro-2-bromopyridinium)azo-1,3-diaminobenzene): 1g/L ethanol solution. Weigh 0.1g of cobalt reagent and dissolve it in 100mL of ethanol (95%) and store it in a brown bottle. 4.1.2 Identification method
4.1.2.1 Identification of cobalt ions
Take the sample solution, add 2mL of acetic acid-sodium acetate buffer solution, add 3 drops of cobalt reagent and 3 drops of hydrochloric acid solution, and the solution will turn red. 4.1.2.2 Identification of chloride ions
Take the sample solution, add silver nitrate solution, and a white precipitate will be generated. It is insoluble in nitric acid. 4.2 Determination of cobalt chloride content
4.2.1 Summary of method
In an acidic medium, the cobalt in the test solution reacts with thiocyanate to form cobalt thiocyanate [Co(SCN). 2-ion complex, in the presence of acetone, use disodium ethylenediaminetetraacetic acid (EDTA) standard titration solution to form a complex with cobalt, and when the end point is reached, the blue color disappears. 4.2.2 Reagents and materials
4.2.2.1 Hydroxylamine hydrochloride.
4.2.2.2 Ammonium thiocyanate.
4.2.2.3 Acetone.
4.2.2.4 Saturated ammonium acetate solution.
4.2.2.5 Standard titration solution of disodium ethylenediaminetetraacetic acid: c(EDTA) is about 0.05mol/L. 4.2.3 Analysis steps
Weigh about 0.35~~0.40g of sample (accurate to 0.0002g), place it in a 250mL conical flask, add 50mL of water, add 0.25g of hydroxylamine hydrochloride, add 10g of ammonium thiocyanate, add 4mL of saturated ammonium acetate solution, shake the hook, add 50mL of acetone, and titrate with standard titration solution of disodium ethylenediaminetetraacetic acid (EIDTA) until the blue color disappears completely, which is the end point. 4.2.4 Expression of analysis results
The cobalt nitride (CoCl2·6H,O) content (X,) expressed as mass fraction is calculated according to formula (1): Xi = cV×0.2379×100
The cobalt (Co) content (X,) expressed as mass fraction is calculated according to formula (2): XaV×0.05893 ×100
Wherein: V is the volume of the standard ethylenediaminetetraacetic acid disodium solution consumed during titration, mL; c is the actual concentration of the standard ethylenediaminetetraacetic acid disodium solution, mol/L; (1)
m is the mass of the sample, g;
0.2379 is the mass of cobalt chloride expressed in grams equivalent to 1.00 mL of the standard ethylenediaminetetraacetic acid disodium solution [c (EDTA) = 1.000 mol/L];
HG 2938--2001
is the mass of cobalt expressed in grams equivalent to 1.00 mL of the standard ethylenediaminetetraacetic acid disodium solution [c (EDTA) 1.000 mol/L].
4.2.5 Allowable difference
The arithmetic mean of the results of the parallel determinations shall be taken as the determination result. The absolute difference between the parallel determination results shall not exceed 0.2%. 4.3 Determination of water-insoluble matter
4.3.1 Instruments and equipment
4.3.1.1 Glass crucible: pore size is 5m15um. 4.3.1.2 Electric oven: can control the temperature at 105℃~110℃. 4.3.2 Analysis steps
Weigh about 20g of sample (accurate to 0.01g), place it in a 400mL beaker, add 200mL of water to dissolve the sample, keep it warm in a water bath for 1h, filter it with a constant weight glass crucible, wash the filter residue with hot water until the washing liquid is colorless, and dry it in a 105℃ electric oven to constant weight. 4.3.3 Expression of analysis results
The water-insoluble content (X) expressed as mass fraction is calculated according to formula (3): X3
m22×100
Wherein: m\
The mass of water-insoluble matter and glass sand, g;
-The mass of glass sand crucible, g;
The mass of the sample, g.
4.3.4 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 0.005%. 4.4 Determination of arsenic content
4.4.1 Silver salt method (arbitration method)
4.4.1.1 Summary of method
Same as Chapter 2 of GB/T13079-1999.
4.4.1.2 Reagents and materials
Same as Chapter 3 of GB/T13079-1999.
4.4.1.3 Instruments and equipment
Same as Chapter 4 of GB/T13079-1999.
4.4.1.4 Analysis steps
a) Preparation of test solution
Weigh (1.0±0.01) g of sample and dissolve it in 50 mL of water. b) Drawing of working curve
Operate according to the provisions of 5.2 of GB/T13079-1999. c) Determination
The test solution shall be measured according to the provisions of 5.3 of GB/T13079--1999 from "accurately draw an appropriate amount of solution·\". 4.4.1.5 Expression of analysis results
The arsenic (As) content (X,) expressed as mass fraction shall be calculated according to formula (4): ml × 100
Wherein: mi -
The mass of arsenic in the sample obtained by measurement, g; The mass of the sample, g.
4.4.1.6 Tolerance
· (3)
· (4)
HG 2938—2001
Take the arithmetic mean of the parallel determination results as the determination result. The absolute difference of the parallel determination results shall not exceed 0.0001%. 4.4.2 Arsenic spot method
Weigh (1.0±0.01)g of sample, dissolve in 50mL of water, and determine according to Chapter 6 of GB/T610.1-1988. The color of the arsenic spot produced by the sample shall not be darker than the color produced by the standard solution. The standard solution is to be pipetted with 5mL (1mL contains 1 μgAs) arsenic standard solution, and treat it in the same way as the sample. 4.5 Determination of lead content
4.5.1 Summary of method
Same as Chapter 2 of GB/T13080-1991.
4.5.2 Reagents and materials
Same as Chapter 3 of GB/T13080-1991.
4.5.3 Instruments and equipment
Same as Chapter 4 of GB/T13080-1991.
4.5.4 Analysis steps || tt||4.5.4.1 Preparation of test solution
Weigh (1.0±0.01)g of sample, add appropriate amount of water to dissolve, transfer to a 50mL volumetric flask, dilute to scale with water, and shake well. 4.5.4.2 Drawing of working curve
Operate according to the provisions of 6.2 of GB/T13080-1999. 4.5.4.3 Determination
According to the provisions of 6.3 of GB/T13080-1991, the test solution is accurately pipetted from **·" for determination. 4.5.5 Expression of analysis results
The lead (Pb) content (X:) expressed as mass fraction is calculated according to formula (5): m×100
Wherein: m.--the mass of lead in the sample obtained by determination, g; m. the mass of the sample, g.
4.5.6 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 0.0002%. 4.6 Determination of fineness
4.6.1 Instruments and equipment
Test sieve: R40/3 series in accordance with GB/T6003.1, Φ200mmX50mm/0.800mm. 4.6.2 Analysis steps
Weigh about 50g of sample (accurate to 0.01g), place it in the test sieve for sieving, and weigh the sieve underflow (accurate to 0.01g). 4.6.3 Expression of analysis results
The fineness (X.) expressed as the mass fraction of the sieve underflow is calculated according to formula (6): ml×100
X. =
Where: ml-
-mass of the sieve undersize, g;
mass of the sample, g.
4.6.4 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 0.2%. 5 Inspection rules
5.1 All items specified in this standard are factory inspection items. 866
·（5）
5.2 Each batch of products shall not exceed 1t.
HG2938—2001
5.3 Determine the number of sampling units in accordance with the provisions of GB/T6678. Each plastic woven bag is a packaging unit. When sampling, insert the sampler obliquely from the top of each selected packaging bag to 3/4 of the depth of the material layer, and take out no less than 500g of sample with a sampler. After mixing the sample, reduce it to about 200g by quartering method, and immediately put it into two clean and dry wide-mouth bottles with ground stoppers and seal them. Paste labels on the bottles, indicating the manufacturer's name, product name, batch number, sampling date and name of the sampler. One bottle is used for inspection and the other bottle is kept for three months for reference. 5.4 Feed-grade cobalt chloride should be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer should ensure that all feed-grade cobalt chloride shipped from the factory meets the requirements of this standard. 5.5 The user has the right to accept the received feed-grade cobalt chloride products in accordance with the provisions of this standard, and the acceptance time shall be within one month from the date of arrival of the goods.
5.6 If one of the indicators in the inspection results does not meet the requirements of this standard, re-sampling should be carried out from twice the amount of packaging for re-inspection. If even one indicator in the re-inspection results does not meet the requirements of this standard, the entire batch of products shall be unqualified. 6 Marks and labels
6.1 The packaging bags of feed-grade cobalt chloride should be firmly and clearly marked, including the manufacturer's name, address, product name, trademark, "feed-grade", net content, batch number or production date, production license number and this standard number. 6.2 Each batch of products leaving the factory should be accompanied by a label, and the content of the label should comply with the provisions of GB10648. 7 Packaging, transportation and storage
7.1 The inner packaging of feed-grade cobalt chloride is a two-layer polyethylene film bag, and the outer packaging is a plastic woven bag. The net content of each bag is 25kg. If the user has special requirements for packaging, it can be negotiated. 7.2 For the packaging of feed-grade cobalt chloride, the film bag is tied twice with vinyl rope or a 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 opening is sewn with vinyl thread or other thread of equivalent quality at a distance of not less than 15mm from the bag edge. The stitches are neat and the stitch length is uniform. There is no leakage or skipping. 7.3 Feed grade cobalt chloride should be covered during transportation to prevent exposure to sunlight, rain and moisture. It should not be transported together with toxic and hazardous substances. 7.4 Feed grade cobalt chloride should be stored in a dry warehouse to prevent exposure to rain, moisture and sunlight. It should not be stored together with toxic and hazardous substances.Calculate according to formula (4): ml × 100
Where: mi-
The mass of arsenic in the sample obtained by measurement, g; the mass of the sample, g.
4.4.1.6 Allowable difference
·(3)
·(4)
HG 2938—2001
Take the arithmetic mean of the parallel measurement results as the measurement result. The absolute difference of the parallel measurement results shall not exceed 0.0001%. 4.4.2 Arsenic spot method
Weigh (1.0±0.01)g of sample, dissolve it in 50mL of water, and measure it according to Chapter 6 of GB/T610.1-1988. The color of the arsenic spot produced by the sample shall not be darker than the color produced by the standard solution. The standard solution is to take 5mL (1mL contains 1 μgAs) of arsenic standard solution with a pipette and treat it in the same way as the sample. 4.5 Determination of lead content
4.5.1 Summary of the method
Same as Chapter 2 of GB/T13080-1991.
4.5.2 Reagents and materials
Same as Chapter 3 of GB/T13080-1991.
4.5.3 Instruments and equipment
Same as Chapter 4 of GB/T13080-1991.
4.5.4 Analysis steps
4.5.4.1 Preparation of test solution
Weigh (1.0±0.01) g of sample, add appropriate amount of water to dissolve, transfer to a 50 mL volumetric flask, dilute with water to the scale, and shake well. 4.5.4.2 Drawing of working curve
Operate according to the provisions of 6.2 of GB/T13080-1999. 4.5.4.3 Determination
The test solution shall be measured from the precise pipette according to the provisions of 6.3 of GB/T13080-1991. 4.5.5 Expression of analysis results
The lead (Pb) content (X:) expressed as mass fraction shall be calculated according to formula (5): m×100
Wherein: m.--the mass of lead in the sample obtained by measurement, g; m. the mass of the sample, g.bzxZ.net
4.5.6 Allowable difference
The arithmetic mean of the parallel measurement results shall be taken as the measurement result. The absolute difference of the parallel measurement results shall not exceed 0.00. 02%. 4.6 Determination of fineness
4.6.1 Instruments and equipment
Test sieve: R40/3 series in accordance with GB/T6003.1, Φ200mmX50mm/0.800mm. 4.6.2 Analysis steps
Weigh about 50g of sample (accurate to 0.01g), place it in the test sieve for sieving, and weigh the sieve underflow (accurate to 0.01g). 4.6.3 Expression of analysis results
The fineness (X.) expressed as the mass fraction of the sieve underflow is calculated according to formula (6): ml×100
X. =
Where: ml-
-mass of the sieve undersize, g;
mass of the sample, g.
4.6.4 Allowable difference
The arithmetic mean of the parallel determination results shall be taken as the determination result. The absolute difference of the parallel determination results shall not exceed 0.2%. 5 Inspection rules
5.1 All items specified in this standard are factory inspection items. 866
·(5)
5.2 Each batch of products shall not exceed 1t.
HG2938—2001
5.3 Determine the number of sampling units in accordance with the provisions of GB/T6678. Each plastic woven bag is a packaging unit. When sampling, insert the sampler obliquely from the top of each selected packaging bag to 3/4 of the depth of the material layer, take out no less than 500g of sample, mix the sample, and divide it into about 200g by quartering method, and immediately put it into two clean and dry wide-mouth bottles with ground stoppers and seal them. Stick labels on the bottles, Indicate the manufacturer's name, product name, batch number, sampling date and name of the sampler. One bottle is used for inspection and the other is kept for three months for future reference. 5.4 Feed-grade cobalt chloride should be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer should ensure that all feed-grade cobalt chloride shipped from the factory meets the requirements of this standard. 5.5 The user has the right to inspect and accept the received feed-grade cobalt chloride products in accordance with the provisions of this standard, and the inspection time shall be within one month from the date of arrival of the goods.
5.6 If one of the indicators in the inspection results does not meet the requirements of this standard, re-samples should be taken from twice the amount of packaging for re-inspection. If even one indicator in the re-inspection results does not meet the requirements of this standard, the entire batch of products shall be unqualified. 6 Markings and Labels
6.1 The packaging bag of feed-grade cobalt chloride should have firm and clear markings, including the manufacturer's name, address, product name, trademark, "feed grade", net content, batch number or production date, production license number and this standard number. 6.2 Each batch of products leaving the factory shall be accompanied by a label, and the content of the label shall comply with the provisions of GB10648. 7 Packaging, transportation and storage
7.1 The inner packaging of feed-grade cobalt chloride shall be a two-layer polyethylene film bag, and the outer packaging shall be a plastic woven bag. The net content of each bag is 25kg. If the user has special requirements for packaging, it can be negotiated. 7.2 For the packaging of feed-grade cobalt chloride, the film bag shall be tied twice with vinyl rope or a rope of equivalent quality, or sealed with other equivalent methods. The outer bag shall be folded at a distance of not less than 30mm from the edge of the bag, and the opening shall be sewn with vinyl thread or other thread of equivalent quality at a distance of not less than 15mm from the edge of the bag. The stitches shall be neat and the stitch length shall be uniform. There shall be no leakage or skipping of seams. 7.3 During transportation, feed-grade cobalt chloride shall be covered to prevent sun exposure, rain and moisture. It shall not be transported together with toxic and hazardous substances. 7.4 Feed-grade cobalt chloride shall be stored in a dry warehouse to prevent rain, moisture and sun exposure. It must not be stored together with toxic and hazardous substances.Calculate according to formula (4): ml × 100
Where: mi-
The mass of arsenic in the sample obtained by measurement, g; the mass of the sample, g.
4.4.1.6 Allowable difference
·(3)
·(4)
HG 2938—2001
Take the arithmetic mean of the parallel measurement results as the measurement result. The absolute difference of the parallel measurement results shall not exceed 0.0001%. 4.4.2 Arsenic spot method
Weigh (1.0±0.01)g of sample, dissolve it in 50mL of water, and measure it according to Chapter 6 of GB/T610.1-1988. The color of the arsenic spot produced by the sample shall not be darker than the color produced by the standard solution. The standard solution is to take 5mL (1mL contains 1 μgAs) of arsenic standard solution with a pipette and treat it in the same way as the sample. 4.5 Determination of lead content
4.5.1 Summary of the method
Same as Chapter 2 of GB/T13080-1991.
4.5.2 Reagents and materials
Same as Chapter 3 of GB/T13080-1991.
4.5.3 Instruments and equipment
Same as Chapter 4 of GB/T13080-1991.
4.5.4 Analysis steps
4.5.4.1 Preparation of test solution
Weigh (1.0±0.01) g of sample, add appropriate amount of water to dissolve, transfer to a 50 mL volumetric flask, dilute with water to the scale, and shake well. 4.5.4.2 Drawing of working curve
Operate according to the provisions of 6.2 of GB/T13080-1999. 4.5.4.3 Determination
The test solution shall be measured from the precise pipette according to the provisions of 6.3 of GB/T13080-1991. 4.5.5 Expression of analysis results
The lead (Pb) content (X:) expressed as mass fraction shall be calculated according to formula (5): m×100
Wherein: m.--the mass of lead in the sample obtained by measurement, g; m. the mass of the sample, g.
4.5.6 Allowable difference
The arithmetic mean of the parallel measurement results shall be taken as the measurement result. The absolute difference of the parallel measurement results shall not exceed 0.00. 02%. 4.6 Determination of fineness
4.6.1 Instruments and equipment
Test sieve: R40/3 series in accordance with GB/T6003.1, Φ200mmX50mm/0.800mm. 4.6.2 Analysis steps
Weigh about 50g of sample (accurate to 0.01g), place it in the test sieve for sieving, and weigh the sieve underflow (accurate to 0.01g). 4.6.3 Expression of analysis results
The fineness (X.) expressed as the mass fraction of the sieve underflow is calculated according to formula (6): ml×100
X. =
Where: ml-
-mass of the sieve undersize, g;
mass of the sample, g.
4.6.4 Allowable difference
The arithmetic mean of the parallel determination results shall be taken as the determination result. The absolute difference of the parallel determination results shall not exceed 0.2%. 5 Inspection rules
5.1 All items specified in this standard are factory inspection items. 866
·(5)
5.2 Each batch of products shall not exceed 1t.
HG2938—2001
5.3 Determine the number of sampling units in accordance with the provisions of GB/T6678. Each plastic woven bag is a packaging unit. When sampling, insert the sampler obliquely from the top of each selected packaging bag to 3/4 of the depth of the material layer, take out no less than 500g of sample, mix the sample, and divide it into about 200g by quartering method, and immediately put it into two clean and dry wide-mouth bottles with ground stoppers and seal them. Stick labels on the bottles, Indicate the manufacturer's name, product name, batch number, sampling date and name of the sampler. One bottle is used for inspection and the other is kept for three months for future reference. 5.4 Feed-grade cobalt chloride should be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer should ensure that all feed-grade cobalt chloride shipped from the factory meets the requirements of this standard. 5.5 The user has the right to inspect and accept the received feed-grade cobalt chloride products in accordance with the provisions of this standard, and the inspection time shall be within one month from the date of arrival of the goods.
5.6 If one of the indicators in the inspection results does not meet the requirements of this standard, re-samples should be taken from twice the amount of packaging for re-inspection. If even one indicator in the re-inspection results does not meet the requirements of this standard, the entire batch of products shall be unqualified. 6 Markings and Labels
6.1 The packaging bag of feed-grade cobalt chloride should have firm and clear markings, including the manufacturer's name, address, product name, trademark, "feed grade", net content, batch number or production date, production license number and this standard number. 6.2 Each batch of products leaving the factory shall be accompanied by a label, and the content of the label shall comply with the provisions of GB10648. 7 Packaging, transportation and storage
7.1 The inner packaging of feed-grade cobalt chloride shall be a two-layer polyethylene film bag, and the outer packaging shall be a plastic woven bag. The net content of each bag is 25kg. If the user has special requirements for packaging, it can be negotiated. 7.2 For the packaging of feed-grade cobalt chloride, the film bag shall be tied twice with vinyl rope or a rope of equivalent quality, or sealed with other equivalent methods. The outer bag shall be folded at a distance of not less than 30mm from the edge of the bag, and the opening shall be sewn with vinyl thread or other thread of equivalent quality at a distance of not less than 15mm from the edge of the bag. The stitches shall be neat and the stitch length shall be uniform. There shall be no leakage or skipping of seams. 7.3 During transportation, feed-grade cobalt chloride shall be covered to prevent sun exposure, rain and moisture. It shall not be transported together with toxic and hazardous substances. 7.4 Feed-grade cobalt chloride shall be stored in a dry warehouse to prevent rain, moisture and sun exposure. It must not be stored together with toxic and hazardous substances.2 Each batch of products shall not exceed 1t.
HG2938—2001
5.3 Determine the number of sampling units in accordance with the provisions of GB/T6678. Each plastic woven bag is a packaging unit. When sampling, insert obliquely from the top of each selected packaging bag to 3/4 of the depth of the material layer, and use a sampler to take out no less than 500g of sample. After mixing the sample, reduce it to about 200g by quartering, and immediately put it into two clean and dry wide-mouth bottles with ground stoppers and seal them. Paste labels on the bottles, indicating the manufacturer's name, product name, batch number, sampling date and name of the sampler. One bottle is used for inspection, and the other bottle is kept for three months for reference. 5.4 Feed-grade cobalt chloride should be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer should ensure that all feed-grade cobalt chloride shipped from the factory meets the requirements of this standard. 5.5 The user has the right to inspect and accept the received feed-grade cobalt chloride products in accordance with the provisions of this standard, and the inspection time shall be within one month from the date of arrival of the goods.
5.6 If one of the indicators in the inspection results does not meet the requirements of this standard, samples should be taken from twice the amount of packaging for re-inspection. If even one indicator of the re-inspection result does not meet the requirements of this standard, the entire batch of products shall be unqualified. 6 Marks and labels
6.1 The packaging bag of feed-grade cobalt chloride shall have firm and clear marks, including the name of the manufacturer, address, product name, trademark, "feed grade", net content, batch number or production date, production license number and this standard number. 6.2 Each batch of products leaving the factory shall be accompanied by a label, and the content of the label shall comply with the provisions of GB10648. 7 Packaging, transportation and storage
7.1 The inner packaging of feed-grade cobalt chloride adopts two-layer polyethylene film bags, and the outer packaging adopts plastic woven bags. The net content of each bag is 25kg. If the user has special requirements for packaging, it can be negotiated. 7.2 For the packaging of feed grade cobalt chloride, the film bag shall be tied twice with vinyl rope or rope of equivalent quality, or sealed with other equivalent methods. The outer bag shall be folded at a distance of not less than 30mm from the bag edge, and the opening shall be sewed with vinyl thread or other thread of equivalent quality at a distance of not less than 15mm from the bag edge. The stitches shall be neat and the stitch length shall be uniform. There shall be no leakage or skipping of seams. 7.3 During transportation, feed grade cobalt chloride shall be covered to prevent sun exposure, rain and moisture. It shall not be transported together with toxic and hazardous substances. 7.4 Feed grade cobalt chloride shall be stored in a dry warehouse to prevent rain, moisture and sun exposure. It shall not be stored together with toxic and hazardous substances. 8672 Each batch of products shall not exceed 1t.
HG2938—2001
5.3 Determine the number of sampling units in accordance with the provisions of GB/T6678. Each plastic woven bag is a packaging unit. When sampling, insert obliquely from the top of each selected packaging bag to 3/4 of the depth of the material layer, and use a sampler to take out no less than 500g of sample. After mixing the sample, reduce it to about 200g by quartering, and immediately put it into two clean and dry wide-mouth bottles with ground stoppers and seal them. Paste 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 for inspection, and the other bottle is kept for three months for reference. 5.4 Feed-grade cobalt chloride should be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer should ensure that all feed-grade cobalt chloride shipped from the factory meets the requirements of this standard. 5.5 The user has the right to inspect and accept the received feed-grade cobalt chloride products in accordance with the provisions of this standard, and the inspection time shall be within one month from the date of arrival of the goods.
5.6 If one of the indicators in the inspection results does not meet the requirements of this standard, samples should be taken from twice the amount of packaging for re-inspection. If even one indicator of the re-inspection result does not meet the requirements of this standard, the entire batch of products shall be unqualified. 6 Marks and labels
6.1 The packaging bag of feed-grade cobalt chloride shall have firm and clear marks, including the name of the manufacturer, address, product name, trademark, "feed grade", net content, batch number or production date, production license number and this standard number. 6.2 Each batch of products leaving the factory shall be accompanied by a label, and the content of the label shall comply with the provisions of GB10648. 7 Packaging, transportation and storage
7.1 The inner packaging of feed-grade cobalt chloride adopts two-layer polyethylene film bags, and the outer packaging adopts plastic woven bags. The net content of each bag is 25kg. If the user has special requirements for packaging, it can be negotiated. 7.2 For the packaging of feed grade cobalt chloride, the film bag shall be tied twice with vinyl rope or rope of equivalent quality, or sealed with other equivalent methods. The outer bag shall be folded at a distance of not less than 30mm from the bag edge, and the opening shall be sewed with vinyl thread or other thread of equivalent quality at a distance of not less than 15mm from the bag edge. The stitches shall be neat and the stitch length shall be uniform. There shall be no leakage or skipping of seams. 7.3 During transportation, feed grade cobalt chloride shall be covered to prevent sun exposure, rain and moisture. It shall not be transported together with toxic and hazardous substances. 7.4 Feed grade cobalt chloride shall be stored in a dry warehouse to prevent rain, moisture and sun exposure. It shall not be stored together with toxic and hazardous substances. 867
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