作业场所空气中锡的微波消解-氢化物发生原子荧光光度测定法

Determination of Tin in Air by Microwave Digestion-HG-AFS

目的建立作业场所空气中锡的微波消解-原子荧光光度测定法。方法将采样完毕的微孔滤膜按微波消解程序处理后,将消解液进一步处理,以原子荧光光度法测定锡。结果方法的线性范围为0.3～100.0μg/L,检出限为0.3μg/L,最低检出浓度为0.0001mg/m3(以采集75L空气样品计),测定相对标准偏差为2.7%～3.5%,样品加标回收率为96.5%～104.7%。结论该方法具有快速准确、灵敏度高、精密度好等优点,可用于作业场所空气中锡的测定。

Objective To develop a method for determination of tin in the air of workplace by microwave digestion-HG-AFS. Methods The air samples were collected and the concentration of tin was determined by microwave digestion-HG-AFS and the parameters of atomic fluorescence spectrometry were studied. Results In the optimum condition, the detection limit of tin was 0.3μg/L, the lowest detected concentration of tin in the samples was 0.000 1 mg/m^3 （based on 75 L air sample）, the RSD was 2.7%- 3.5%, the rate of recovery was in the range of 96.5%-104.7%. Conclusion The method is rapid, convenient, accurate, sensitive and suitable for determination of tin in the air of workplace.