GB 20802-2017 English PDF

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GB 20802-2017: Feed additive -- Cupric methionine complex (chelate)
Status: Valid

GB 20802: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB 20802-2017	199	Add to Cart	3 days	Feed additive -- Cupric methionine complex (chelate)	Valid
GB/T 20802-2006	319	Add to Cart	3 days	Feed additive -- Cupric methionine	Obsolete

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Basic data

Standard ID: GB 20802-2017 (GB20802-2017)
Description (Translated English): Feed additive -- Cupric methionine complex (chelate)
Sector / Industry: National Standard
Classification of Chinese Standard: B46
Classification of International Standard: 65.120
Word Count Estimation: 10,149
Date of Issue: 2017-10-14
Date of Implementation: 2018-05-01
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

GB 20802-2017: Feed additive -- Cupric methionine complex (chelate)

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Feed additive - Cupric methionine complex (chelate) ICS 65.120 B46 National Standards of People's Republic of China Replacing GB/T 20802-2006 Feed additive methionine copper (chelate) compounds 2017-10-14 Published 2018-05-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released

Foreword

The first chapter of this standard, Chapter 3 and Chapter 5 is mandatory, the rest are recommended. This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 20802-2006 "feed additive methionine copper." This standard compared with GB/T 20802-2006, the main technical differences are as follows. --- "Sensory traits" to "appearance and traits", appearance and traits added water-soluble indicators. --- Removed the molar ratio of 1. 1 methionine copper network (chelate) related content. --- In the technical indicators added chelation rate indicators. --- The expression of copper and methionine content by the percentage of the amount of marked changes to copper and methionine content. --- The molar ratio of 2. 1 methionine copper moisture content from less than or equal to 5% to less than or equal to 2%; the lead content from small Modified to equal or equal to 20 mg/kg at 30 mg/kg; the sieve was sieved from "100% through 0.42 mm (40 mesh) 0.20mm (80 mesh) sieve screenings less than or equal to 20% "was revised to" 0.20mm sieve sieve screen is less than or equal to 20%. " --- Inspection rules provided for the factory inspection and type inspection. This standard is proposed and managed by the National Feed Industry Standardization Technical Committee (SAC/TC76). This standard drafting unit. Chinese Academy of Agricultural Sciences Beijing Institute of Animal Husbandry and Veterinary, Feed Quality Supervision and Inspection Station in Shanghai, Shanghai feed Industrial Standardization Committee. The main drafters of this standard. Luo Xu Gang, Lu Lin, Zhu Yongwen, Zhang Liyang, Zhang Ling Yan, Zhao Zhihui, Feng Mao Xi, Yang Haifeng, Lei Ping. This standard replaces the standards previously issued as. --- GB/T 20802-2006. Feed additive methionine copper (chelate) compounds

1 Scope

This standard specifies the requirements of feed additive methionine copper (chelate) compounds, test methods, inspection rules and labeling, packaging, transportation, Storage and shelf life. This standard applies to methionine (2-amino-4-methylthio-butyric acid) and copper sulfate synthesis molar ratio of 2. 1 methionine copper network (chelation) Compound products. The molar ratio of 2. 1 methionine copper network (chelate) formula .C10H20N2O4S2Cu, the relative molecular mass of 359.95 (press 2007 International relative atomic mass meter).

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 601 chemical reagent standard titration solution preparation GB/T 5917.1 forage particle size determination two sieve screening method GB/T 6435 Determination of moisture in feed GB/T 6682 analytical laboratory water specifications and test methods GB 10648 feed label Determination of total arsenic in feedstuffs GB/T 13079-2006 Feedstuffs - Determination of lead - Atomic absorption spectrometry GB/T 13080-2004 GB/T 13080.2-2005 Feed additives - Determination of chelating rate of methionine iron (copper, manganese, zinc) Gel Filtration Chromatography GB/T 14699.1 feed sampling

3 requirements

3.1 Appearance and traits The methionine copper complex (chelate) with a molar ratio of 2. 1 is a blue-purple powder slightly soluble in water with a slight methionine odor. No caking, hair Mold, deterioration phenomenon. 3.2 Specifications Feed additive methionine copper (chelate) products should be consistent with the provisions of Table 1. Table 1 technical indicators Project Indicators Copper (Cu) /% ≥16.8 Methionine /% ≥78.0 Chelation rate /% ≥95 Table 1 (continued) Project Indicators Moisture /% ≤2 Total arsenic (As)/(mg/kg) ≤10 Lead (Pb)/(mg/kg) ≤20 Particle size (0.20 mm sieve) /% ≤20

4 test methods

CAUTION Some procedures specified in the test methods may result in hazardous conditions and the operator should take appropriate safety and protective measures. The standard test methods used reagents and water, did not indicate when the other requirements, refer to analytical reagents and GB/T 6682 provisions Three water; all titration analysis standard solution prepared and calibrated according to GB/T 601. 4.1 Sensory test Take the right amount of sample placed on a white paper, observe the color under natural light, smell its taste. 4.2 Identification 4.2.1 Reagents and solutions 4.2.1.1 Methanol. 4.2.1.2 Trichloromethane. 4.2.1.3 Dithizone solution in chloroform (10 μg/mL) Weigh 1 mg of dithizone and dissolve in 100 mL of chloroform (4.2.1.2). 4.2.1.4 pyridine. 4.2.2 Identification method Weigh 1.0g sample, extracted with 25mL methanol (4.2.1.1), filtered, the filtrate was taken 0.1mL, sequentially added dithizone trichloromethane dissolved Liquid (4.2.1.3) 3mL, the test solution shall not appear cloudy, precipitation phenomenon; then add pyridine (4.2.1.4) 0.5mL, blue liquid test solution shall not appear. 4.3 Determination of copper content 4.3.1 Principle After digestion with nitric acid and hydrochloric acid, the sample was complexed with copper ions with ethylenediaminetetraacetic acid (EDTA) at a pH of 5, Pyridylazo) -2-naphthol (PAN) indicator indicates the end point of the titration, calculated from the volume of disodium ethylenediaminetetraacetate standard solution consumed Copper content. 4.3.2 Reagents and materials 4.3.2.1 Nitric acid. 4.3.2.2 Hydrochloric acid. 4.3.2.3 ammonia solution. Ammonia water = 1 9. 4.3.2.4 acetic acid - sodium acetate buffer solution (pH = 5) .82g of sodium acetate plus 25mL of acetic acid, diluted with water to.200mL. 4.3.2.5 disodium edetate standard titration solution (EDTA-2Na) .c (EDTA-2Na) = 0.02mol/L. 4.3.2.6 1- (2-Pyridylazo) -2-naphthol (PAN) indicator 0.2 g of 1- (2-pyridylazo) -2-naphthol (PAN) was dissolved in 100 mL of 95% Ethanol. 4.3.3 Analysis steps Weigh 0.25g sample, accurate to 0.0001g, placed in 250mL conical flask, add 3mL nitric acid (4.3.2.1) and 3mL hydrochloric acid (4.3.2.2), heated to near dry, after cooling, add 20mL water heated to near dry, add water after cooling 80mL, with ammonia solution (4.3.2.3) tune The solution pH is about 5, then the solution was dark blue, added acetic acid - sodium acetate buffer solution (4.3.2.4) 10mL and PAN indicator (4.3.2.6) 3 drops, then heated to boil, while hot Disodium ethylenediaminetetraacetate standard titration solution (4.3.2.5) titration to yellowish green end. At the same time, another 250mL Erlenmeyer flask, a blank test, in addition to not adding the sample, the other types of operations and the amount of reagents and measurement are measured The same test. 4.3.4 Calculation and representation of results The copper content in the sample X1 is mass fraction, the value is expressed in%, and can be calculated according to the formula (1). X1 = (V1-V0) × c1M1 × 10-3 m1 × 100 (1) In the formula. V0 --- titration blank solution consumption of disodium edetate standard titration solution (4.3.2.5) of the volume in milliliters (mL); V1 --- titration sample solution consumption of disodium edetate standard titration solution (4.3.2.5) of the volume in milliliters (mL); c1 --- disodium edetate standard titration solution (4.3.2.5) concentration in units of moles per liter (mol/L); M1 --- molar mass of copper in grams per millimolar (g/mol) (M1 = 63.55); m1 --- sample quality, in grams (g). The arithmetic mean of the two parallel determination results is the determination result, and the result is retained to one decimal place. The absolute difference between the two measurements is not more than 1%. Determination of methionine content 4.4 4.4.1 Principle Excess iodine solution is added accurately in neutral medium, two iodine atoms are added to the sulfur atom of methionine, the excess iodine solution is treated with sulfur Substitution of sodium sulfate standard titration solution back to the sample from the consumption of sodium thiosulfate standard titration solution volume calculated methionine content of the sample. 4.4.2 Reagents and materials 4.4.2.1 Potassium iodide. 4.4.2.2 hydrochloric acid solution .6mol/L. 4.4.2.3 Sodium hydroxide solution .20%. 4.4.2.4 sulfuric acid solution. Sulfuric acid water = 15. 4.4.2.5 potassium dihydrogen phosphate solution .200 g/L. 4.4.2.6 dipotassium hydrogen phosphate solution .200 g/L. 4.4.2.7 iodine solution .c (1/2I2) = 0.1mol/L. 4.4.2.8 sodium thiosulfate standard titration solution .c (Na2S2O3) = 0.1mol/L. 4.4.2.9 Starch indicator solution .10g/L. 4.4.3 Analysis steps Weigh 1.5g sample, accurate to 0.0001g, placed in a 100mL beaker, add 50mL water, 3mL hydrochloric acid solution (4.4.2.2), plus Heat dissolved, with sodium hydroxide solution (4.4.2.3) to adjust the pH greater than or equal to 13, boiled 3min, cooled and moved into 250mL volumetric flask, Dilute to the mark, take the supernatant filtration, accurately remove 50mL filtrate in iodine bottle, add 50mL of water, with sulfuric acid solution (4.4.2.4) tune A pH of 7 was added and 10 mL potassium dihydrogen phosphate solution (4.4.2.5), 10 mL dipotassium hydrogen phosphate solution (4.4.2.6), 2 g potassium iodide (4.4.2.1), Shake, accurately add 50mL iodine solution (4.4.2.7), evenly, in the dark place 30min, with sodium thiosulfate standard titration solution (4.4.2.8) drops Set until the solution color changes from dark blue to light blue, add 3 mL of starch indicator solution (4.4.2.9) and continue titration until the solution blue disappears. At the same time, take another 100mL beaker and 250mL Erlenmeyer flask, a blank test, in addition to without the sample, the other operations and add the reagent species Class and quantity are the same with the test. 4.4.4 Calculation and representation of results The content of methionine in sample X2 is calculated by mass fraction, the value is expressed in%, and can be calculated according to formula (2). X2 = (V2-V3) × c2M2 × 10-3 × 5 m2 × 100 (2) In the formula. V2 --- titration blank solution consumed sodium thiosulfate standard titration solution (4.4.2.8) of the volume in milliliters (mL); V3 --- titration test solution consumed sodium thiosulfate standard titration solution (4.4.2.8) volume, in milliliters (mL); c2 --- sodium thiosulfate standard titration solution (4.4.2.8) the actual concentration in units of moles per liter (mol/L); M2 --- with the consumption of 1moL sodium thiosulfate standard titration solution (4.4.2.8) equivalent methionine mass, in grams per mole (g/mol) (M2 = 74.6); m2 --- the quality of the sample, in grams (g). The arithmetic mean of the two parallel determination results is the determination result, and the result is retained to one decimal place. The absolute difference between the two measurements is not more than 1%. 4.5 Chelation rate determination According to GB/T 13080.2-2005 determination. 4.6 Determination of moisture content According to GB/T 6435 determination. 4.7 Determination of total arsenic content Sample pretreatment according to GB/T 13079-2006 in 5.4.1.2, measured by GB/T 13079-2006 in Chapter 5. 4.8 Determination of lead content Pre-treatment of samples according to GB/T 13080-2004 in 7.1.2.1, measured according to GB/T 13080-2004. Sample determination required Deduct the background. 4.9 Determination of particle size According to GB/T 5917.1 determination.

5 inspection rules

5.1 group approved With the same material, the same production process, continuous production or the same batch of products produced for a group. 5.2 Sampling According to the provisions of GB/T 14699.1 sampling. 5.3 factory inspection The items listed in Table 1, copper, methionine, moisture, total arsenic and lead content for the factory inspection items. 5.4 type test Type inspection items for all the requirements of Chapter 3. Product normal production, at least once every six months type test, but the following conditions When one of the conditions, also conducted type testing. a) when the product is shaped b) there is a big change in the production process or the source of raw materials, which may affect the product quality; c) stop production for more than three months, to resume production; d) the factory test results and the last type test results are quite different. 5.5 decision rules Inspection results have an indicator does not meet the requirements of this standard, should be re-sampled twice from the amount of packaging reinspection, retest results even There is an indicator does not meet the requirements of this standard, the entire batch of products is unqualified. 6 Label, package, transport and storage 6.1 Label According to GB 10648 implementation. 6.2 Packaging Packaging materials should be non-toxic, harmless, moisture-proof. 6.3 Transportation Prevent packaging damage during transport, the sun, rain, prohibit co-operation with toxic and hazardous substances. 6.4 Storage Storage to prevent the sun, rain, toxic and harmful substances prohibited mixing.

7 shelf life

Under the stipulated transportation and storage conditions, the shelf life is 24 months. ......

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