Abstract:

Abstract: This essay researched the determination method of inorganic arsenic in formula feed of marine fish. Applied 6mol/L hydrochloric acid as medium, picked up 1h from 70℃, then used active carbon to absorb organic substance such as organic arsenic, applied HG-AFS method to determine the inorganic arsenic content in formula feed of marine fish. the preparation of this method is simple and fast. The detection limit 0.08mg/kg; the recovery range was 85.5%～109.7%; The RSD was 2.6%～9.8%; linear scope0～400μg/L . After examined in 4 different labs using same sample, the result indicated that both the accuracy and nicety of this method satisfied the requirements of determination.The proposed method has been applied to the determination of actual sample with satisfactory results.