Search result: GB/T 13882-2023 (GB/T 13882-2010 Older version)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 13882-2023 | English | 189 |
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Determination of iodine in feeds
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GB/T 13882-2023
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| GB/T 13882-2010 | English | 239 |
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Determination of iodine in feeds -- Ferric thiocyanate-nitric acid catalytic kinetic method
| Obsolete |
GB/T 13882-2010
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| GB/T 13882-2002 | English | 239 |
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Determination of iodine in feeds (Ferric thiocyanate-nitric acid catalytic kinetic method)
| Obsolete |
GB/T 13882-2002
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| GB/T 13882-1992 | English | 239 |
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Determination of iodine in feeds
| Obsolete |
GB/T 13882-1992
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| Standard ID | GB/T 13882-2023 (GB/T13882-2023) | | Description (Translated English) | Determination of iodine in feeds | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B46 | | Classification of International Standard | 65.120 | | Word Count Estimation | 10,12 | | Date of Issue | 2023-08-06 | | Date of Implementation | 2024-03-01 | | Older Standard (superseded by this standard) | GB/T 13882-2010 | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration |
GB/T 13882-2023. Determination of iodine in feed
ICS 65.120
CCSB46
National Standards of People's Republic of China
Replace GB/T 13882-2010
Determination of iodine in feed
Published on 2023-08-06
2024-03-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Preface
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
This document replaces GB/T 13882-2010 "Determination of iodine in feed - Ferric thiocyanate-nitrite catalytic kinetic method" and is consistent with
Compared with GB/T 13882-2010, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) Increased the quantitative limit of the iron thiocyanate-nitrite catalytic kinetic method (see Chapter 1);
b) Added inductively coupled plasma mass spectrometry (see Chapter 4);
c) The preparation method of iodine standard working solution has been changed (see 5.2.10, 4.10 of the.2010 edition);
d) Changed the dry ashing method (see 5.5.1, 7.1.1 of the.2010 version);
e) Deleted the wet method (see 7.1.2 of the.2010 version);
f) The drawing of the iodine standard working curve has been changed (see 5.5.2.1, 7.2.1 of the.2010 version);
g) Changed precision (see 5.7, Chapter 9 of the.2010 edition).
Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents.
This document is proposed and coordinated by the National Feed Industry Standardization Technical Committee (SAC/TC76).
This document was drafted by. Guofang Wuhan Scientific Research and Design Institute Co., Ltd., Sichuan Well Testing Technology Co., Ltd., Hubei Provincial Animal Science and Technology Co., Ltd.
Institute of Drug Control, Sichuan Provincial Grain Quality Monitoring Center, Chengdu Shuxing Feed Co., Ltd.
The main drafters of this document. Zhang Fengping, Huang Changjun, Liu Jun, Qian Fang, Li Fang, Liu Xiaomin, Zhang Yanhong, Li Dexiang, Wang Jun, Yang Jun, Li Guiyou,
Wang Boyuan, Du Yan.
The previous versions of this document and the documents it replaces are as follows.
---First published as GB/T 13882-1992 in.1991, revised for the first time in.2002, and revised for the second time in.2010;
---This is the third revision.
Determination of iodine in feed
1 Scope
This document describes methods for the inductively coupled plasma mass spectrometry and ferric thiocyanate-nitrite catalytic kinetic determination of iodine in feed.
This document is applicable to the determination of iodine in compound feeds, concentrated feeds, concentrate supplements, additive premixed feeds and feed raw materials.
The detection limit of the inductively coupled plasma mass spectrometry method in this document is 0.05 mg/kg, and the quantitation limit is 0.10 mg/kg. Ferric thiocyanate-nitrite
The detection limit of the catalytic kinetic method is 0.10mg/kg, and the quantification limit is 0.20mg/kg.
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations
For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to
this document.
GB/T 6682 Specifications and test methods for water used in analytical laboratories
GB/T 20195 Preparation of animal feed samples
3 Terms and definitions
There are no terms or definitions to be defined in this document.
4 Inductively coupled plasma mass spectrometry (arbitration method)
4.1 Principle
The iodine in the sample is extracted with tetramethylammonium hydroxide (TMAH) solution, and measured with an inductively coupled plasma mass spectrometer.
Qualification of mass number 127 (mass-to-charge ratio, m/z) is carried out based on the intensity ratio of the mass spectrum signals of iodine element and internal standard element being proportional to the concentration of iodine element.
Quantitatively, determine the iodine content in the sample.
4.2 Reagents or materials
Unless otherwise specified, use only high-grade pure reagents.
4.2.1 Water. GB/T 6682, Level 1.
4.2.2 Extraction solution. Measure.200mL of 25% TMAH solution, dilute with water, adjust the volume to 500mL, and mix well.
4.2.3 Dilute the solution. Pipette 5mL of 25% TMAH solution, dilute with water, adjust the volume to 500mL, and mix well.
4.2.4 Iodine standard stock solution (1mg/mL). Weigh potassium iodate (KIO3, CAS No.. 7758-
05-6, reference reagent) 0.1685g, or weigh potassium iodide (KI, CAS No.. 7681-11-0, reference reagent) dried in a silica gel desiccator for 24 hours.
0.1308g, dissolve in water, transfer to 100mL brown volumetric flask, dilute to volume with water, mix well. Store in brown bottle, 2℃~8℃
Save, valid for 3 months. Or purchase certified reference materials.
4.2.5 Iodine standard intermediate solution I (10μg/mL). Accurately transfer 1mL of iodine standard stock solution (4.2.4) into a 100mL brown volumetric flask
, dilute the solution (4.2.3) to volume, and mix evenly. Ready for immediate use.
4.2.6 Iodine standard intermediate solution II (100ng/mL). Accurately transfer 1mL of iodine standard intermediate solution I (4.2.5) into 100mL brown volume
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GB/T 13882-2010
Determination of iodine in feeds. Ferric thiocyanate-nitric acid catalytic kinetic method
ICS 65.120
B46
National Standards of People's Republic of China
Replacing GB/T 13882-2002
Determination of iodine in feed
Ferrothiocyanate - nitrite catalysis kinetics
Issued on. 2011-01-14
2011-07-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard replaces GB/T 13882-2002 "Determination of iodine in feed Rhodanate - Nitrite by Catalytic Kinetic Method."
This standard compared with GB/T 13882-2002, the main technical changes are as follows.
--- Original standard "7.2.1 iodine standard curve drawing" in "with distilled water to make up 5mL", now revised to
"Distilled water volume of about 5mL distilled water and shake";
--- Original standard "measurement of the sample solution 7.2.2" in "with distilled water to make up 5mL", is now amended to read "plus steamed
Distilled water for about 5mL ".
This standard by the National Feed Industry Standardization Technical Committee (SAC/TC76) and focal points.
This standard was drafted. National Feed Quality Supervision and Inspection Center (Wuhan).
The main drafters of this standard. Qian Fang, Hefeng Qin, Huang Ting, Yang Lin.
This standard replaces the standards previously issued as follows.
--- GB/T 13882-1992, GB/T 13882-2002.
Determination of iodine in feed
Ferrothiocyanate - nitrite catalysis kinetics
1 Scope
This standard specifies the method for the determination of iodine in the diet.
This standard applies to single feed, feed, concentrate supplement feed, concentrated feed and feed additive premix.
The standard minimum detection limit of 0.1mg/kg.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
Laboratory use specifications and test methods GB/T 6682 Analysis
GB/T 14699.1 feed samples
GB/T 20195 Animal feed sample preparation
Principle 3
The destruction of organic matter in the sample, iodine liberated. Iodide ions have the right amount of nitrite in the presence of dilute nitric acid solution, can catalyze thiocyanate
Iron fade. Within a certain range, iron thiocyanate and iodide ion concentration fade speed linear relationship was available spectrophotometry.
4 Reagents and solutions
Unless otherwise specified, use only recognized as analytical reagent in the analysis. Test water should comply with GB/T 6682 in the three water regulation
Grid or equivalent purity.
4.1 nitric acid solution. 11.
4.2 potassium carbonate solution.
4.2.1 solution of potassium carbonate, 300g/L. Weigh 300g of potassium carbonate dissolved in 1000mL water.
4.2.2 solution of potassium carbonate, 30g/L. Weigh 30g of potassium carbonate dissolved in 1000mL water.
4.3 zinc sulfate solution. Weigh 10g of zinc sulfate (ZnSO4 · 7H2O) was dissolved in 1000mL of water.
4.4 potassium thiocyanate solution, c (KCNS) = 0.1mol/L. Weigh 0.97g of potassium thiocyanate was dissolved in water and transferred to 100mL volumetric flask, dilute
To the mark.
4.5 ammonium ferric sulfate - nitric acid solution, c [NH4Fe (SO4) 2 · 12H2O] = 0.1mol/L. Weigh 6.0g of ammonium ferric sulfate [NH4Fe (SO4) 2 ·
12H2O] dissolved in water was slowly added nitric acid 47mL, transferred to 100mL volumetric flask, dilute to the mark with water. This solution was formulated the day.
4.6 SCN - sodium nitrite solution. Weigh 0.0483g of sodium nitrite in water was added potassium thiocyanate solution (4.4) 5mL, moved
100mL volumetric flask, dilute to the mark. This solution was formulated the day.
4.7 color fixative. in 300mL of water, followed by adding sulfuric acid 50mL, sodium chloride 25g, hydroxylamine hydrochloride 5g, stannous 10g, dissolved
Dilute with water to 500mL, after backup solution.
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