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GB/T 19542-2025 English PDF

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GB/T 19542-2025: Determination of sulfonamides in feeds - Liquid chromatography-tandem mass spectrometry
Status: Valid

GB/T 19542: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 19542-2025	English	279	Add to Cart	3 days [Need to translate]	Determination of sulfonamides in feeds - Liquid chromatography-tandem mass spectrometry	Valid	GB/T 19542-2025
GB/T 19542-2007	English	159	Add to Cart	3 days [Need to translate]	Determination of sulfonamides in feeds -- High-performance liquid chromatography	Valid	GB/T 19542-2007
GB/T 19542-2004	English	239	Add to Cart	2 days [Need to translate]	Determination of sulfamethazine and sulfamonomethoxine in feeds -- High-performance Liquid chromatography	Obsolete	GB/T 19542-2004

Standard similar to GB/T 19542-2025

GB/T 51033 GB/T 50082

Basic data

Standard ID	GB/T 19542-2025 (GB/T19542-2025)
Description (Translated English)	Determination of sulfonamides in feeds - Liquid chromatography-tandem mass spectrometry
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	B46
Classification of International Standard	65.120
Word Count Estimation	14,126
Date of Issue	2025-08-01
Date of Implementation	2026-02-01
Older Standard (superseded by this standard)	GB/T 19542-2007, GB/T 8381.10-2005
Issuing agency(ies)	State Administration for Market Regulation, Standardization Administration of China

GB/T 19542-2025: Determination of sulfonamides in feeds - Liquid chromatography-tandem mass spectrometry

---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT19542-2025
ICS 65.120 CCSB46 National Standard of the People's Republic of China Replaces GB/T 19542-2007, GB/T 8381.10-2005 Determination of sulfonamides in feed Liquid chromatography-tandem mass spectrometry Released on August 1, 2025 Implementation on February 1, 2026 State Administration for Market Regulation The National Standardization Administration issued

Preface

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 19542-2007 "Determination of sulfonamides in feed - High performance liquid chromatography" and GB/T 8381.10- 2005 "Determination of sulfaquinoline in feed - High performance liquid chromatography method". This document is based on GB/T 19542-2007 and integrates Compared with GB/T 19542-2007, this document has the following changes, except for the structural adjustment and editorial changes. The technical changes are as follows. a) The scope of application and limit of quantification have been changed, and the types of sulfonamides have been added (see Chapter 1, Chapter 1 of the.2007 edition); b) The principles have been changed (see Chapter 4, Chapter 3 of the.2007 edition); c) The test steps have been changed (see Chapter 8, Chapter 7 of the.2007 edition); d) The test data processing has been changed (see Chapter 9, Chapter 8 of the.2007 edition); e) The precision requirements have been changed (see Chapter 10, 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 is proposed and coordinated by the National Feed Industry Standardization Technical Committee (SAC/TC76). This document was drafted by. Institute of Agricultural Quality Standards and Testing Technology, Chinese Academy of Agricultural Sciences, Henan Zhongbiao Testing Service Co., Ltd., Shandong Shenghua Testing Technology Co., Ltd. and Guangzhou Huibiao Testing Technology Center. The main drafters of this document are. Suo Decheng, Fan Xia, Zhao Yuejun, Xiao Zhiming, Hao Yanjuan, An Zhixin, Jia Songtao, Tang Jian, Zhang Xiao, Wang Zhimin, Li Mengyu, Zhang Bing, Tao Yan, Guan Lin, and Wang Shi. The previous versions of the documents replaced by this document are as follows. ---GB/T 8381.10, first issued in.2005; ---GB/T 19542, first issued in.2004, first revised in.2007, this is the second revision, incorporated into GB/T 8381.10- Content from.2005. Determination of sulfonamides in feed Liquid chromatography-tandem mass spectrometry

1 Scope

This document describes a method for the determination of 29 sulfonamides in feed by liquid chromatography-tandem mass spectrometry. This document applies to compound feeds, concentrated feeds, concentrate supplements, additive premixes, mixed feed additives and feed ingredients Sulfamylon, sulfaguanidine, sulfa, sulfacetamide, sulfadimethoxine, sulfadiazine, sulfathiazole, sulfapyridine, trimethoprim Sulfadiazole, sulfamethazine, trimethoprim, sulfadimethoxine, sulfamethoxazole, sulfamethazine, dimethicone Oxymethylbenzylamine, sulfamethoxypyridazine, sulfachloropyridazine, sulfamethoxazole, sulfamethoxazole, sulfa-o-dimethoxine, sulfamethoxazole, Methotrexate, sulfabenzoyl, sulfaphenazole, sulfachloropyrazine, sulfapyrazole, sulfamethoxazole, sulfaquinoline, sulfanitrophenyl Determination. The detection limit of the method in this document is 0.03 mg/kg and the quantification limit is 0.1 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 Principles

The analytes in the sample were extracted with formic acid acetonitrile solution, purified by multiple impurity adsorption materials, and detected by liquid chromatography-tandem mass spectrometry. The standard curve was added for calibration and the external standard method was used for quantification.

5 Reagents or materials

Unless otherwise specified, only analytical grade reagents were used. 5.1 Water. GB/T 6682, Grade 1. 5.2 Methanol. chromatographic grade. 5.3 Formic acid. chromatographically pure. 5.4 0.1% formic acid solution. Take 0.1 mL of formic acid (5.3) and add it to 100 mL of water and mix well. 5.5 Extraction solution. Take 10 mL of formic acid, add 990 mL of acetonitrile and mix well. 5.6 Dilution solution. Take 0.1 mL of formic acid and 10 mL of methanol, add 90 mL of water and mix well.

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