动植物样品中砷的测定,样品前处理过程费时.本文采用自控石墨电热消化装置,提高了样品处理效率,单机一次可同时处理60个样品.处理后的样品用原子吸收光谱仪结合流动注入式氢化物发生装置进行分析,相对标准偏差为7.2％,回收率在84～110％.本法一次处理样品,可同时测定Pb、Cd、Cu、Zn、Sn、Hg 等多种元素. The determination of arsenic in animal and plant samples takes a long time in the process of sample preparation.In this paper, the self-controlled graphite electrothermal digestion device is used to improve the efficiency of sample processing.At the same time, 60 samples can be processed simultaneously.After treatment, the samples were analyzed by atomic absorption spectrometer with flow injection hydrogenation The relative standard deviation (RSD) was 7.2% and the recovery rate was 84% ​​~ 110% .The sample was processed by this method, and various elements such as Pb, Cd, Cu, Zn, Sn and Hg were simultaneously determined.