Abstract:

The content of arsenic and antimony in the p lant samp le are determined by hydride generation atomic fluo escence spectrometry with step2flow injection technology. This paper analyzes influencing factors of determination accuracy, then choosing p roperworking conditions of instrument, reductant concentration, acidity of samp le solution andcarrier liquid. Under the op timal condition, the detection limits of arsenic and antimony are 0. 05 and 0. 06 , p recisionare 0. 4% and 0. 5% , the recoveries of arsenic and antimony are in the ranges of 98%～102% and 96%～104%.

Key words: Pressurized digestion, Intermittent flow, Hydride generation, Atomic fluorescence spectrometry, Plant sample, Arsenic and antimony