工作场所空气中二氧化锡测定的碱熔消解-原子荧光光谱法.pdfVIP

140 中华劳动卫生职业病杂志 2016 年2 月第 34 卷第 2 期 Chin J Ind Hyg Occup Dis , Feb 2016 ,Vo I.34 ,No.2 ·监测与检验技术· 工作场所空气中二氧化锡测定的碱熔 消解-原子荧光光谱法 刘各贫建培李双凤林怡然 [摘要] 目的 建立工作场所空气中二氧化锡的碱熔消解一原子荧光光谱测定方法。方法工作场 所空气中二氧化锡经微孔滤膜采集，固体氢氧化纳碱熔法电炉加热直接消解，原子荧光光谱法测定。结 果 原子荧光光谱法测定二氧化锡(以锡计)的线性范围为1.5-100 问IL ， 相关系数为 0.9993 ，方法检出 3 限为 0.5 问儿，定量下限为1.5μgIL，最低检出浓度为 0.05 mg/m ( 以采集 75 L 空气样品计)，相对标准偏 差为1.94ì毛-3.559岛，平均加标回收率为 95.0%-96.0%。结论 碱熔消解-原子荧光光谱法测定工作场所 空气中二氧化锡，操作简便，快速，消解完全;方法灵敏、准确。 [关键词] 二氧化锡;工作场所;原子荧光光谱法;碱熔消解 Determination of tin dioxide in workplace air by atomic fluorescence spectrometry after alkali fusion Liu Fen , Yun Jianpei , Li Shuangfeng , Lin Yirω， 1. Shenzhen Prevention and Tre a1ment Centerfor Occupa1 ion Diseases , Shenzhen 518000 , China [Abstract] Objective To establish the method of atomic f1 uorescence spectrometry (AFS) after alkali fusion for determination of tÎn dioxide in workplace air. Methods Tin dioxide in workpJace air was collected with microporous membrane , directly digested by alkali fusion with solid sodium hydroxide heated by electric fumace , and determined by AFS. Results The linear range of tin dioxide (as Sn) determined by AFS was 1.5- 100μglL (excluding zero) , and the correlation coefficient was 0.9993. The detection Iimit of this method was 0.5μ.gIL， the lower limit of quantifìcation was 1.5μglL ， and the minimum detectable concentralÍon was 0.05 mglm 3 (the volume of the air sample was 75 L). The relative standard deviation was 1. 94%-3.559毛， and the average recove巧。f standard addition was 95.0%-96.0%. Conclusion The method of AFS after alkali fusion for determination of tin dioxide in workplace air is proved to be simple , rapid , sensitive , and accurate , with complete digestion [Key words] Tin dio