Vulcan_(42)消解—原子荧光测定土壤和沉积物中的砷汞

Determination of Arsenic and Mercury in Soil and Sediment with Vulcan_(42) Digestion and Atomic Fluorescence Spectrophotometry

建立了全自动样品处理系统Vulcan42-原子荧光光度法测定土壤和沉积物中砷和汞的方法。准确称取0．2500g样品。经Vulcan42全自动消解系统消解后，采用原子荧光光度计测定砷和汞的含量。运用该方法砷的检出限为0．11mg/kg，回收率在96％～101％之间，相对标准偏差（n=6）在1．3％～4．5％之间；汞的检出限为0．003mg/kg，回收率在90％～108％之间，相对标准偏差（n=6）在0．5％～4．7％之间。

Abstract： The contents of arsenic and mercury in soil and sediment were determined by a fully automatic sample handling system vulcan42-atomic fluorescence spectrophotometry. 0.2500 g sample was accurate weighed and digested by Vulcan42. Then arsenic and mercury in sample were determined with atomic fluorescence spectrophotometer. The detection limits of arsenic and mercury were 0.11 mg/kg and 0.003 mg/kg, the recovery rates were 96%～ 101% and 90% ～108%, and the relative standard deviations （ n=6 ） were 1.3 ～ 4.5% and 0.5～4.7%.