GB/T 21037-2024 English PDF

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GB/T 21037-2024: Determination of diaveridine, trimethoprim and ormetoprim in feeds
Status: Valid

GB/T 21037: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21037-2024	299	Add to Cart	3 days	Determination of diaveridine, trimethoprim and ormetoprim in feeds	Valid
GB/T 21037-2007	239	Add to Cart	3 days	Determination of trimethoprim in feeds -- High performance liquid chromatography	Obsolete

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Basic data

Standard ID: GB/T 21037-2024 (GB/T21037-2024)
Description (Translated English): Determination of diaveridine, trimethoprim and ormetoprim in feeds
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: B46
Classification of International Standard: 65.120
Word Count Estimation: 14,143
Date of Issue: 2024-03-15
Date of Implementation: 2024-10-01
Older Standard (superseded by this standard): GB/T 21037-2007
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 21037-2024: Determination of diaveridine, trimethoprim and ormetoprim in feeds

---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.
ICS 65.120 CCSB46 National Standards of People's Republic of China Replace GB/T 21037-2007 Trimethoprim, trimethoprim and Determination of Trimethoprim-sulfamethoxazole Released on 2024-03-15 2024-10-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document replaces GB/T 21037-2007 "Determination of trimethoprim in feed - High performance liquid chromatography" and Compared with GB/T 21037-2007, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) Added the determination method of trimethoprim and trimethoprim (see Chapter 1); b) The scope of application has been expanded to include concentrate supplements and animal-derived feed ingredients (see Chapter 1); c) The detection limit and quantification limit have been changed (see Chapter 1, Chapter 1 of the.2007 edition); d) Liquid chromatography-tandem mass spectrometry has been added (see Chapter 4); e) The principle has been changed (see 5.1, Chapter 3 of the.2007 edition); f) The test steps have been changed (see 5.5, Chapter 7 of the.2007 edition); g) The precision has been changed (see 5.7, Chapter 9 of the.2007 edition). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed and coordinated by the National Feed Industry Standardization Technical Committee (SAC/TC76). This document was drafted by. Sichuan Well Testing Technology Co., Ltd., Shandong Animal Products Quality and Safety Center, Tongwei Agricultural Development Co., Ltd. Limited company. The main drafters of this document are. Zhang Fengping, Wang Xin, Li Junling, Tang Huaying, Sun Yanjun, Du Xueli, Yang Fashu and Zhang Lu. The previous versions of this document and the documents it replaces are as follows. ---First published in.2007 as GB/T 21037-2007; ---This is the first revision. Trimethoprim, trimethoprim and Determination of Trimethoprim-sulfamethoxazole

1 Scope

This document describes the liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis of trimethoprim, trimethoprim and trimethoprim in feed. spectroscopy and high performance liquid chromatography methods. This document applies to dimethoate in compound feeds, concentrated feeds, concentrate supplements, additive premixes and animal-derived feed ingredients. Determination of benzylpyrimethoprim, trimethoprim and dimethoprim. The detection limit of this document for liquid chromatography-tandem mass spectrometry is 2.5 μg/kg, and the quantification limit is 5.0 μg/kg; the detection limit of high performance liquid chromatography is The limit of measurement is 0.25 mg/kg, and the limit of quantification is 0.50 mg/kg.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, 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 that require definition in this document. 4 Liquid chromatography-tandem mass spectrometry (arbitration method) 4.1 Principle The analytes in the sample were extracted with ethyl acetate under weak alkaline conditions, defatted with n-hexane, and purified with a mixed strong cation exchange column. The product was determined by liquid chromatography-tandem mass spectrometry and quantified by internal standard method. 4.2 Reagents or materials Unless otherwise specified, only analytical grade reagents were used. 4.2.1 Water. GB/T 6682, Grade 1. 4.2.2 Methanol. chromatographic grade. 4.2.3 Acetonitrile. chromatographic grade. 4.2.4 Formic acid. chromatographically pure. 4.2.5 Ammonium acetate. chromatographic grade. 4.2.6 Ammonia water. ......

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