Standard No.:	SN/T 5884-2025
English Name:	Determination of Sulfuryl Fluoride Residues in Food for Import and Export - GC-MS Method
Chinese Name:	进出口食品中硫酰氟残留量的测定 顶空气相色谱法
Professional Classification:	SN    Professional Standard - Import&Export Inspection
Source Content Issued by:	General Administration of Customs
Issued on:	2025-12-11
Implemented on:	2026-7-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	7500 words
Translation Price(USD):	225.0
Delivery:	via email in 1 business day

SN/T 5884-2025 Determination of sulfuryl fluoride residues in foodstuffs for import and export - Headspace gas chromatography 1 Scope This document describes a headspace gas chromatography method for the determination of sulfuryl fluoride residues in foodstuffs. This document is applicable to the determination of sulfuryl fluoride residues in foodstuffs including rice, ginger, cucumber, corn flour, walnut, raisin, cassia bark, tilapia, duck liver, beef, dried pork, milk and egg. Other foodstuffs may be determined by reference to this method. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB 2763 National food safety standard - Maximum residue limits for pesticides in food GB/T 6682 Water for analytical laboratory use - Specification and test methods 3 Terms and definitions The following normative documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 6682 Water for analytical laboratory use - Specification and test methods 4 Method summary Sulfuryl fluoride in the specimen is extracted with water and determined by automatic headspace gas chromatography with electron capture detector (GC-ECD). Qualitative analysis is performed by retention time, and quantitative analysis is carried out by the external standard method using the matrix single standard method or matrix standard curve method. 5 Reagents and materials Unless otherwise specified, all reagents used are of analytical grade, and the water is Grade 1 water as specified in GB/T 6682. 5.1 Reagents 5.1.1 Acetone (CH3COCH3, CAS No.: 67-64-1): chromatographic grade. 5.1.2 Ammonium chloride (NH4Cl, CAS No.: 12125-02-9). 5.2 Reference materials Bottled stock gas of sulfuryl fluoride reference material (Sulfuryl fluoride, SO2F2, CAS No.: 2699-79-8): 2 000.0 mg/L, or reference materials with certified reference material certificates. 5.3 Preparation of standard solutions 5.3.1 Sulfuryl fluoride content in bottled stock gas of sulfuryl fluoride reference material at room temperature and atmospheric pressure: The room temperature and atmospheric pressure are recorded, and the concentration of sulfuryl fluoride standard solution is calculated using Equation (1). (1) where, C——the mass concentration of the bottled gas at room temperature, mg/L; Cs——the mass concentration of the bottled gas under standard conditions, mg/L; 273.15——the absolute temperature under standard conditions, K; P₅——the standard atmospheric pressure of the test environment, expressed in atm;

Contents Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Method summary 5 Reagents and materials 6 Apparatus and equipment 7 Specimen preparation 8 Determination procedures 9 Calculation and expression of results 10 Limit of detection, limit of quantification and recovery Annex A (Informative) Gas chromatogram of sulfuryl fluoride reference material Annex B (Informative) Spiking levels and recovery data