氢化物发生—原子荧光光谱法测定气田废水中的痕量砷

Determination of Trace Amounts of Arsenic in Gas Field Sewage by Hydride Generation-Atomic Fluorescence Spectrometry

采用氢化物发生—原子荧光光谱法测气田废水中的痕量砷。方法有取样量少 ,操作简单、灵敏度高、准确度高、重现性好等优点。砷的测定线性范围为 1～ 2 0 0 ng/ m L ,方法的检出限为 0 .0 45 3ng/ m L ,相对标准偏差小于等于1.6 % ,加标回收率在 96 .0 %～ 97.7%范围内。测定密码标样与气田废水中的痕量砷 。

Hydride generation atomic fluorescence spectrometry was adopted to determinate trace amounts of arsenic in gas field sewage.This method has the merits of less sample volumes,operaton convenience,higher sensitivity,higher accuracy and better repeatability.The linear range of determination was from 1 ng/mL to 200 ng/mL,the detected limit of this method was 0.0453 ng/mL while relative standard deviation less than 1.6% and mark on recovery ranging from 96.0% to 97.7%.This method obtained a satisfactory result for determining code sample and trace amounts of arsenic in gas field sewage.