氢化物发生-原子荧光法测定工作场所中锡的方法研究

Determination of air stannum in workplace by hydride generator-atomic fluorescence spectrometry

目的：建立工作场所空气中锡的氢化物发生-原子荧光光度测定方法。方法：按照《工作场所空气中毒物检测方法的研制规范》的要求进行实验室及现场实验。结果：本方法在5．6—300ng／ml范围呈线性关系；样品处理后可保存48h；方法重现性好，不同浓度标准溶液的相对标准偏差为0．88％～3．65％；样品加标回收率为95％-103％；方法的最低检出限为5．6ng／ml；当采气量为75L时，本法最低检测浓度0．037mg／m^3，方法选择性好。结论：此方法各项指标均达到《工作场所空气中毒物检测方法的研制规范》的要求，适用于工作场所空气中锡的监测。

Objective：To establish a method for determination of air stannum in workplace by hydride generator -atomic fluorescence spectrometry. Methods：The samples were detected according to ＂Standardization of metholds for determination of poisonous substance in workplace＂ experimenting in lab and locale. Results： The methold exhibited a linear relation within 5.6 - 300 ng/ml, the samples could be stored for 48 h after disposal. Precision （RSD） was 0. 88% - 3.65%, recovery of spiked samples was 95% - 103% and detection limit was 5.6 ng/ml. Concentration detection limit was 0. 037 mg/m^3 while sample collection was 75 L. And the methold had good selectivity. Conclusion：This methold is conformed with the requirements of ＂Standardization of metholds for determination of poisonous substance in workplace＂. It is feasible for determination of air stannum in workplace.