Determination of Arsenic and Antimony in the Plant Sample by Hydride Generation Atomic Fluorescence Spectrometry with Pressurized Digestion

The content of arsenic and antimony in the plant sample are determined by hydride generation atomic fluorescence spectrometry with step-flow injection technology.This paper analyzes influencing factors of determination accuracy,then choosing proper working conditions of instrument,reductant concentration,acidity of sample solution and carrier liquid.Under the optimal condition,the detection limits of arsenic and antimony are 0.05 and 0.06,precision are 0.4% and 0.5%,the recoveries of arsenic and antimony are in the ranges of 98%~102% and 96%~104%.