Testing parameters for milk and dairy products

1 Scope: This standard specifies 12 types of milk and formula β- Method for the determination of stimulant residues by liquid chromatography-tandem mass spectrometry. This standard applies to 12 types of milk and formula β Determination of multiple residues of stimulants. 12 types of p-stimulant drugs include brombuterol, cimaterol, clenbuterol, clenpenterol, hydroxymethylaminoclenbuterol, isoxsuprine, mabuterol, ractopamine, ritodrine, salbutamol Terbutaline and tulobuterol. The detection limit of the method in this standard; The detection limit for ractopamine, salbutamol, zemanterol, clenbuterol, and clenbuterol in milk is 0.05 pg/kg. The detection limit for bromobuterol, tobuterol, mabuterol, terbutaline, ritodrine, phenoxypropafenolamine, and hydroxymethylaminoclenbuterol in milk powder is 0.25 ug/kg. The detection limit for ractopamine, salbutamol, zemanterol, clenbuterol, and clenbuterol in milk powder is 0.4 uxg/kg, while the detection limit for bromobuterol, tobuterol, and clenbuterol in milk powder is 0.4 uxg/kg The detection limit for mabutrol, terbutaline, ritodrine, phenoxypropafenolamine, and hydroxymethylaminoclenbuterol is 2.0 ug/kg. 2 Normative references: The clauses in the following documents have become clauses of this standard through reference. For dated reference documents, all subsequent amendments (excluding corrected content) or revisions are not applicable to this standard. Therefore, parties to agreements based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version applies to this standard. GB/T 6379.1 Accuracy (Accuracy and Precision) of Measurement Methods and Results Part 1: General Principles and Definitions (GB/T 6379.1-2004.1SO 5725-1:1994.1DT) GB/T 6379,2 Accuracy (Accuracy and Precision) of Measurement Methods and Results Part 2: Basic Methods for Determining the Repeatability and Reproducibility of Standard Measurement Methods (GB/T 6379.2-2004.1SO 5725-2; 1994 IDT) GB/T 6682 Specification and Test Methods for Analytical Laboratory Water (GB/T 6682-2008. ISO 36961987, MOD) 3 Principle samples undergo dilute acid hydrolysis and perchloric acid precipitation of protein, resulting in residual β- Stimulants were extracted with a mixed solvent of ethyl acetate and isopropanol, purified with a mixed cation exchange reverse phase adsorption solid-phase extraction column, determined by liquid chromatography-tandem mass spectrometry, and quantified by internal standard method

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