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GB 21694-2017 English PDF

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GB 21694-2017: Feed additive -- Zinc methionine complex (chelate)
Status: Valid

GB 21694: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB 21694-2017English199 Add to Cart 3 days [Need to translate] Feed additive -- Zinc methionine complex (chelate) Valid GB 21694-2017
GB/T 21694-2008English239 Add to Cart 3 days [Need to translate] Feed additive -- Zinc methionine Obsolete GB/T 21694-2008

PDF similar to GB 21694-2017


Standard similar to GB 21694-2017

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Basic data

Standard ID GB 21694-2017 (GB21694-2017)
Description (Translated English) Feed additive -- Zinc methionine complex (chelate)
Sector / Industry National Standard
Classification of Chinese Standard B46
Classification of International Standard 65.120
Word Count Estimation 10,195
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 21694-2017: Feed additive -- Zinc methionine complex (chelate)

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Feed additive - Zinc methionine complex (chelate) ICS 65.120 B46 National Standards of People's Republic of China Replacing GB/T 21694-2008 Feed additive methionine zinc (chelate) complexes 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 21694-2008 "feed additive methionine zinc." This standard compared with GB/T 21694-2008, the main technical differences are as follows. --- "Sensory traits" to "appearance and traits." --- Increase the molar ratio of 1. 1 methionine zinc complex (chelate) chelation rate index. --- Molar ratio of 2. 1 zinc methionine (chelate) the moisture content of less than or equal to 5% modified to less than or equal to 2%; Total arsenic content from less than or equal to 8mg/kg to less than or equal to 5mg/kg, lead content from less than or equal to 10mg/kg modified Is less than or equal to 5mg/kg, cadmium content from less than or equal to 10mg/kg modified to less than or equal to 6mg/kg. 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, National Feed Quality Supervision and Inspection Center (Wuhan), Nanning City Zellweger Feed Co., Ltd., Guangzhou days Branch Technology Co., Ltd. The main drafters of this standard. Luo Xu Gang, Lu Lin, Zhu Yongwen, Zhang Liyang, Zhang Ling, Jie Jing Jing, Yang Lin, Zhou Jianqun, Teng Bing. This standard replaces the standards previously issued as. --- GB/T 21694-2008. Feed additive methionine zinc (chelate) complexes

1 Scope

This standard specifies the requirements of feed additive methionine zinc (chelate) compounds, test methods, inspection rules and labeling, packaging, transportation, Storage and shelf life. This standard applies to zinc sulfate and methionine (2-amino-4-methylthio-butyric acid) synthesized in a molar ratio of 2. 1 or 1. 1 methionine Zinc (chelate) products. The molar ratio of 2. 1 methionine zinc complex (chelate) molecular formula .C10H20N2O4S2Zn, relative molecular mass of 361.80. Molecular formula. (C5H10NO2SZn) HSO4, relative molecular weight 310.65 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 feed additive methionine iron (copper, manganese, zinc) chelation rate gel filtration chromatography Determination of cadmium in feedstuffs GB/T 14699.1 feed sampling HG2934-2000 feed grade zinc sulfate

3 requirements

3.1 Appearance and traits Methionine zinc (chelate) complexes with a molar ratio of 2. 1 are white or almost white powder, very slightly soluble in water, light in weight and slightly methionine-specific taste. No caking, moldy phenomenon. The methionine zinc complex (chelate) with a molar ratio of 1. 1 is white or almost white powder, soluble in water, slightly methionine-specific odor. no Caking, moldy phenomenon. 3.2 Specifications Feed additive methionine zinc (chelate) products should be consistent with the provisions of Table 1. Table 1 technical indicators project index The molar ratio of 2. 1 product is 1. 1 Zinc (Zn) /% ≥17.2 ≥19.0 Methionine /% ≥78.0 ≥42.0 Chelation rate /% ≥95 ≥35 Moisture /% ≤2 ≤5 Total arsenic (As)/(mg/kg) ≤5 Lead (Pb)/(mg/kg) ≤5 Cadmium (Cd)/(mg/kg) ≤6 Particle size (0.20 mm sieve) /% ≤2

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 o-Phenanthroline trichloromethane solution (0.1g/L). Weigh 0.01g o-phenanthroline, dissolved in 100mL of chloroform (4.2.1.2). 4.2.1.4 eosin methanol solution (0.1%). Weigh 0.1g eosin, dissolved in 100mL of methanol (4.2.1.1). 4.2.1.5 Potassium hydroxide methanol solution (0.5mol/L) Weigh 2.805g potassium hydroxide, dissolved in 100mL of methanol (4.2.1.1). 4.2.2 Identification Weigh 1.0g sample, extracted with 25mL of methanol (4.2.1.1), filtered, the filtrate was taken 0.1mL, respectively, by adding phenanthroline trichloride Methane solution (4.2.1.3) 2mL, eosin methanol solution (4.2.1.4) 3 drops of methanol solution of potassium hydroxide (4.2.1.5) 1mL, shall not appear turbid. 4.3 Determination of zinc content According to HG2934-2000 5.2 Determination. 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, weighed to 0.0001g, placed in 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 Methionine content in the sample X1 mass fraction, the value is expressed in%, according to equation (1) calculation. X1 = (V0-V1) × c1 × M1 × 10-3 × 5 m1 × 100 (1) In the formula. V0 --- titration blank solution consumed sodium thiosulfate standard titration solution (4.4.2.8) volume, in milliliters (mL); Volume of titration solution of sodium thiosulfate standard titration solution (4.4.2.8) consumed by titration sample solution in milliliters (mL); c1 --- sodium thiosulfate standard titration solution (4.4.2.8) the actual concentration in units of moles per liter (mol/L); M1 --- and consume 1moL sodium thiosulfate standard titration solution (4.4.2.8) equivalent methionine content, in grams per mole (g/mol) (M1 = 74.6); 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%. 4.5 Chelation rate determination According to the method specified in GB/T 13080.2 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 cadmium content Pre-treatment of samples according to GB/T 13082-1991 in 6.1, measured according to GB/T 13082-1991. 4.10 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, zinc, 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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