GB 23200.124-2026 National food safety standard一Determination of three thiadiazole pesticides of thiediazole copper、thiazole zinc、thiosen copper residues in foods of plant origin-Liquid chromatography method (English)
National food safety standard一Determination of three thiadiazole pesticides of thiediazole copper、thiazole zinc、thiosen copper residues in foods of plant origin-Liquid chromatography method
GB 23200.124-2026 National food safety standard一Determination of three thiadiazole pesticides of thiediazole copper、thiazole zinc、thiosen copper residues in foods of plant origin-Liquid chromatography method English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB 23200.124-2026
National food safety standard - Determination of three thiadiazole pesticides of thiediazole copper, thiazole zinc, thiosen copper residues in foods of plant origin-Liquid chromatography method
食品安全国家标准 植物源性食品中噻菌铜、噻唑锌、噻森铜等3种农药及其代谢物残留量的测定 液相色谱法
Issue date: 2026-02-12 Implementation date: 2026-03-01
Issued by the National Health Commission of the People's Republic of China
the Ministry of Agriculture and Rural Affairs of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
Introduction
1 Scope
2 Normative References
3 Principle
4 Reagents and materials
5 Apparatus and equipment
6 Sample preparation
National Food Safety Standard — Determination of residues of three pesticides (thiediazole copper, zinc thiazole, copper thiazine) and their metabolites in plant-derived foods — Liquid chromatography method
1 Scope
This document specifies the liquid chromatography method for the determination of residues of three thiadiazole pesticides — thiediazole copper, zinc thiazole and copper thiazine — in plant-derived foods.
This document applies to the determination of residues of thiediazole copper, zinc thiazole and copper thiazine in plant-derived foods.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative reference. For dated references, only the edition cited applies. For undated references, the latest edition (including all amendments) applies.
GB 2763—2026 National Food Safety Standard — Maximum residue limits for pesticides in food
GB/T 6682 Water for analytical laboratory use — Specification and test methods
3 Principle
The test sample is subjected to constant temperature oscillation in a sodium thiosulfate solution. Thiediazole copper, zinc thiazole and copper thiazine are derivatised to 2-amino-5-mercapto-1,3,4-thiadiazole (AMT). AMT is extracted with an acetonitrile solution under acidic conditions, determined by high-performance liquid chromatography with a UV detector, and quantified by the external standard method.
4 Reagents and materials
Unless otherwise stated, only analytically pure reagents and Grade 1 water complying with GB/T 6682 shall be used in the analysis.
4.1 Reagents
4.1.1 Formic acid (HCOOH, CAS No.: 64-18-6).
4.1.2 Hydrochloric acid (HCl, CAS No.: 7647-01-0, purity 38%).
4.1.3 Sodium thiosulfate (Na₂S₂O₃, CAS No.: 7772-98-7).
4.1.4 N,N-Dimethylformamide (C₃H₇NO, referred to as DMF, CAS No.: 68-12-2).
4.1.5 Acetonitrile (CH₃CN, CAS No.: 75-05-8): chromatographic grade.
4.1.6 Ammonia solution (NH₃·H₂O, CAS No.: 1336-21-6, purity 25%).
4.1.7 Sodium chloride (NaCl, CAS No.: 7647-14-5).
4.2 Preparation of solutions
4.2.1 Hydrochloric acid solution (1 mol/L): Measure 82 mL of hydrochloric acid (4.1.2) into a 1 L volumetric flask, dilute to the mark with water, and mix well.
4.2.2 Sodium thiosulfate solution (1 mol/L): Weigh 158.09 g of sodium thiosulfate (4.1.3), dissolve in water, transfer to a 1 L volumetric flask, dilute to the mark with water, and mix well.
4.2.3 Ammonia solution (999+1): Pipette 1 mL of ammonia solution (4.1.6) into a 1 L volumetric flask, dilute to the mark with water, and mix well.
4.2.4 Hydrochloric acid solution (0.01 mol/L): Pipette 10 mL of hydrochloric acid solution (4.2.1) into a 1 L volumetric flask, dilute to the mark with water, and mix well.
4.2.5 Sodium chloride solution (999+1): Pipette 1 mL of sodium chloride solution (4.1.6) into a 1 L volumetric flask, dilute to the mark with water, and mix well.
4.2.6 Ammonium acetate solution (0.01 mol/L): Pipette 10 mL of ammonium acetate solution (4.2.1) into a 1 L volumetric flask, dilute to the mark with water, and mix well.
4.2.7 Sodium hydroxide solution (999+1): Pipette 1 mL of sodium hydroxide solution (4.1.6) into a 1 L volumetric flask, dilute to the mark with water, and mix well.
4.3 Standards (national certified pesticide reference materials shall be used preferentially)
4.3.1 Thiediazole copper (C₃H₅CuN₃S₂, CAS No.: 3234-61-5), purity ≥ 95%.
4.3.2 Zinc thiazole (C₃H₄N₃S₂·1/2Zn or C₃H₄N₃S₂Zn, CAS No.: 3234-62-6), purity ≥ 95%.
4.3.3 Copper thiazine (C₃H₄CuN₃S₂, CAS No.: 95%), purity ≥ 95%.
Standard
GB 23200.124-2026 National food safety standard一Determination of three thiadiazole pesticides of thiediazole copper、thiazole zinc、thiosen copper residues in foods of plant origin-Liquid chromatography method (English Version)
Standard No.
GB 23200.124-2026
Status
valid
Language
English
File Format
PDF
Word Count
4000 words
Price(USD)
120.0
Implemented on
2026-3-1
Delivery
via email in 1~3 business day
Detail of GB 23200.124-2026
Standard No.
GB 23200.124-2026
English Name
National food safety standard一Determination of three thiadiazole pesticides of thiediazole copper、thiazole zinc、thiosen copper residues in foods of plant origin-Liquid chromatography method
GB 23200.124-2026 National food safety standard一Determination of three thiadiazole pesticides of thiediazole copper、thiazole zinc、thiosen copper residues in foods of plant origin-Liquid chromatography method English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB 23200.124-2026
National food safety standard - Determination of three thiadiazole pesticides of thiediazole copper, thiazole zinc, thiosen copper residues in foods of plant origin-Liquid chromatography method
食品安全国家标准 植物源性食品中噻菌铜、噻唑锌、噻森铜等3种农药及其代谢物残留量的测定 液相色谱法
Issue date: 2026-02-12 Implementation date: 2026-03-01
Issued by the National Health Commission of the People's Republic of China
the Ministry of Agriculture and Rural Affairs of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
Introduction
1 Scope
2 Normative References
3 Principle
4 Reagents and materials
5 Apparatus and equipment
6 Sample preparation
National Food Safety Standard — Determination of residues of three pesticides (thiediazole copper, zinc thiazole, copper thiazine) and their metabolites in plant-derived foods — Liquid chromatography method
1 Scope
This document specifies the liquid chromatography method for the determination of residues of three thiadiazole pesticides — thiediazole copper, zinc thiazole and copper thiazine — in plant-derived foods.
This document applies to the determination of residues of thiediazole copper, zinc thiazole and copper thiazine in plant-derived foods.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative reference. For dated references, only the edition cited applies. For undated references, the latest edition (including all amendments) applies.
GB 2763—2026 National Food Safety Standard — Maximum residue limits for pesticides in food
GB/T 6682 Water for analytical laboratory use — Specification and test methods
3 Principle
The test sample is subjected to constant temperature oscillation in a sodium thiosulfate solution. Thiediazole copper, zinc thiazole and copper thiazine are derivatised to 2-amino-5-mercapto-1,3,4-thiadiazole (AMT). AMT is extracted with an acetonitrile solution under acidic conditions, determined by high-performance liquid chromatography with a UV detector, and quantified by the external standard method.
4 Reagents and materials
Unless otherwise stated, only analytically pure reagents and Grade 1 water complying with GB/T 6682 shall be used in the analysis.
4.1 Reagents
4.1.1 Formic acid (HCOOH, CAS No.: 64-18-6).
4.1.2 Hydrochloric acid (HCl, CAS No.: 7647-01-0, purity 38%).
4.1.3 Sodium thiosulfate (Na₂S₂O₃, CAS No.: 7772-98-7).
4.1.4 N,N-Dimethylformamide (C₃H₇NO, referred to as DMF, CAS No.: 68-12-2).
4.1.5 Acetonitrile (CH₃CN, CAS No.: 75-05-8): chromatographic grade.
4.1.6 Ammonia solution (NH₃·H₂O, CAS No.: 1336-21-6, purity 25%).
4.1.7 Sodium chloride (NaCl, CAS No.: 7647-14-5).
4.2 Preparation of solutions
4.2.1 Hydrochloric acid solution (1 mol/L): Measure 82 mL of hydrochloric acid (4.1.2) into a 1 L volumetric flask, dilute to the mark with water, and mix well.
4.2.2 Sodium thiosulfate solution (1 mol/L): Weigh 158.09 g of sodium thiosulfate (4.1.3), dissolve in water, transfer to a 1 L volumetric flask, dilute to the mark with water, and mix well.
4.2.3 Ammonia solution (999+1): Pipette 1 mL of ammonia solution (4.1.6) into a 1 L volumetric flask, dilute to the mark with water, and mix well.
4.2.4 Hydrochloric acid solution (0.01 mol/L): Pipette 10 mL of hydrochloric acid solution (4.2.1) into a 1 L volumetric flask, dilute to the mark with water, and mix well.
4.2.5 Sodium chloride solution (999+1): Pipette 1 mL of sodium chloride solution (4.1.6) into a 1 L volumetric flask, dilute to the mark with water, and mix well.
4.2.6 Ammonium acetate solution (0.01 mol/L): Pipette 10 mL of ammonium acetate solution (4.2.1) into a 1 L volumetric flask, dilute to the mark with water, and mix well.
4.2.7 Sodium hydroxide solution (999+1): Pipette 1 mL of sodium hydroxide solution (4.1.6) into a 1 L volumetric flask, dilute to the mark with water, and mix well.
4.3 Standards (national certified pesticide reference materials shall be used preferentially)
4.3.1 Thiediazole copper (C₃H₅CuN₃S₂, CAS No.: 3234-61-5), purity ≥ 95%.
4.3.2 Zinc thiazole (C₃H₄N₃S₂·1/2Zn or C₃H₄N₃S₂Zn, CAS No.: 3234-62-6), purity ≥ 95%.
4.3.3 Copper thiazine (C₃H₄CuN₃S₂, CAS No.: 95%), purity ≥ 95%.
