Parameter detection of veterinary drug residues

This standard specifies the scope of export of animal derived foods, including sulfamidine, sulfamethoxazole, sulfapyridine, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, benzoyl sulfonamide, sulfamethoxazole, sulfaquinone Liquid chromatography and liquid chromatography-mass spectrometry/mass spectrometry methods for the determination of residues of 19 sulfonamide drugs, including sulfonylpyridine, sulfonamidoacetate, and sulfonylchloropyridine. The first method of this standard is applicable to sulfamethoxazole, sulfamethoxazole, sulfapyridine, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole Liquid chromatography detection of residues of 17 sulfonamide drugs, including benzenesulfonamide, sulfamethoxazole, sulfaquinone, and sulfaphenylpyridine; The second method is applicable to sulfamethoxazole, sulfathiazole, sulfapyridine, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, sulfamethoxazole, Liquid chromatography-mass spectrometry/mass spectrometry detection and confirmation of residues of 19 sulfonamide drugs, including sulfaquinone, sulfamethoxazole, sulfamethoxazole, and sulfaclopyridine. The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T6682 Specification and Test Methods for Analytical Laboratory Water 3- Method 1- High Performance Liquid Chromatography (HPLC) 3.1 Method Abstract: Sulfonamide drugs in the sample were extracted with ethyl acetate, and the extracted solution was defatted with n-hexane and purified with a solid-phase extraction column. The content was determined by high-performance liquid chromatography and quantified by external standard method. 3.2 Reagents and Materials Unless otherwise specified, all reagents are analytical pure, and the water is the first grade water specified in GB/T 6682. 3.2.1 Methanol, HPLC grade. 3.2.2 Ethyl acetate, HPLC grade. 3.2.3 n-Hexane. 3.2.4 Acetic acid, HPLC grade. 3.2.5 Ammonia water, premium grade pure. 3.2.6 Ammonium acetate, HPLC grade. 3.2.7 Sodium chloride. 3.2.8 2 mmol/L ammonium acetate solution: Accurately weigh 0.154 grams of ammonium acetate (3.2.6) into a beaker, dissolve in 500 mL of water, transfer to a 1 L volumetric flask, and bring to volume with water to the mark

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