GB/T 13079-2022 Active

This document describes the silver salt method, hydride generation atomic fluorescence spectrometry, and inductively coupled plasma mass spectrometry for the determination of total arsenic in feed. This document is applicable to the determination of total arsenic in compound feed, concentrated feed, supplementary feed, additive premix feed, feed raw materials, and feed additives. When the sampling amount is 5 g and the volume of the sample solution is 50 mL, the detection limit of the silver salt method is 0.25 mg/kg, and the quantitative limit is 0.50 mg/kg; when the sampling amount is 5 g, the volume of the sample solution is 50 mL, and the dilution factor is 20, the detection limit of the hydride generation atomic fluorescence spectrometry and inductively coupled plasma mass spectrometry is 0.02 mg/kg, and the quantitative limit is 0.05 mg/kg.