Determination of Arsenic in Feed Grade Cupric Sulphate by Hydride Generation-atomic Florescence Spectrophotometry

The sample treated by purity water,arsenic was determined by hydride generation-atomic florescence spectrophotometry.The instrument conditions and influence of reagent were studied.The detection limit of the method was 0.0593 μg/L.The relative standard deviation was 0.56%.The recovery of the method was 98.5%～101.5%.The method had high sensitivity,and its precision and accuracy both met requirements,which can be used in routine inspection of arsenic in feed grade cupric sulphate.