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See Chinese contents: GB/T 13081-2022 GB/T 13081-2022: Determination of mercury in feeds
This document describes the atomic fluorescence spectrometry, cold atomic absorption spectrometry, and direct injection methods for the determination of total mercury in feeds. This document is applicable to the determination of total mercury in compound feeds, concentrated feeds, concentrate supplements, additive premixed feeds, feed raw materials, and feed additives. Atomic fluorescence spectrometry: When the sample weight is 0.5 g and the constant volume is 50 mL, the method detection limit is 0.6 ¦Ìg/kg and the quantification limit is 3 ¦Ìg/kg. Cold atomic absorption spectrometry: When the sample weight is 2 g and the constant volume is 100 mL, the method detection limit is 3 ¦Ìg/kg and the quantitation limit is 10 ¦Ìg/kg. Direct injection method: When the sample weighing amount is 0.1 g, the detection limit of the method is 0.3 ¦Ìg/kg, and the quantification limit is 1 ¦Ìg/kg.
