T/AFFI 038-2023 Determination of Residual Levels of Eight Fungicides in Raisins by Liquid Chromatography-Tandem Mass Spectrometry

Scope

Main Technical Content: 1. Scope: This standard applies to raisins produced in the Xinjiang region. It specifies the detection methods for aflatoxin B1, aflatoxin B2, aflatoxin G1, aflatoxin G2, ochratoxin A, T-2 toxin, and vomitoxin B2 in raisins. This document is applicable to the detection of eight types of fungal toxins in raisins in this region. 2. Normative Reference Documents: The documents referenced in this document are essential for its application. For dated reference documents, only the version on the specified date is applicable to this document. For undated reference documents, the latest version (including all amendments) is applicable. 3. GB/T 6682: Specifications and Test Methods for Water Used in Analytical Laboratories 4. Terms and Definitions: This document does not define any terms. 5. Principle: The samples are crushed and extracted with a 1% formic acid-acetonitrile solution. The extract is purified by dispersive solid phase extraction, and the determination is performed using liquid chromatography-triple quadrupole mass spectrometry with external standard quantification. 6. Reagents and Materials: Unless otherwise specified, only reagents recognized as analytical grade and water meeting the first-level standards specified in GB/T 6682 are used in the analysis. 6.1 Reagents 6.1.1 Acetonitrile (chromatographic grade) 6.1.2 Sodium chloride (analytical grade) 6.1.3 Anhydrous magnesium sulfate (analytical grade) 6.1.4 Formic acid (chromatographic grade) 6.1.5 Sodium citrate dihydrate (analytical grade) 6.1.6 Sodium citrate hemihydrate (analytical grade) 6.1.7 1% formic acid-acetonitrile solution: Take 10 mL of formic acid and dilute to 1000 mL with acetonitrile, then mix well. 6.1.8 0.1% formic acid-water solution: Take 1 mL of formic acid and dilute to 1000 mL with pure water, then mix well. 6.2 Standard Samples 6.2.1 Aflatoxin B1 (CAS No.: 1162-65-8), purity greater than 98% 6.2.2 Aflatoxin B2 (CAS No.: 7220-8

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