论文部分内容阅读
目的:对工作场所空气中锡及其化合物的测定方法进行改进。方法:采样后的滤膜以硝酸-盐酸(1+10)微波消解或湿法消解,用氢化物原子荧光光度法测定。结果:在该条件下,锡在0μg/L～100μg/L范围内线性良好,相关系数>0.9991,方法最低检出限为0.4μg/L,3个添加水平的回收率为94%～102%(n=8),相对标准偏差1.2%～2.6%(n=8),参考值为207±15μg和408±20μg的质量控制标准物质经消解后进行测定,结果为199.8μg、397.6μg,日间精密度为3.9%和3.4%。(n=3)。结论:该法操作简便、快速,经济,可以准确地测定滤膜中低浓度的锡及其化合物的含量。
Objective: To improve the determination of tin and its compounds in workplace air. Methods: The sampled filter was digested by microwave or nitric acid - hydrochloric acid (1 + 10) or digested by wet method and determined by hydride atomic fluorescence spectrometry. Results: Under these conditions, the linearity of tin in the range of 0μg / L to 100μg / L was good with the correlation coefficient> 0.9991. The detection limit of the method was 0.4μg / L, and the recoveries of the three addition levels were 94% -102% (n = 8), the relative standard deviations of 1.2% -2.6% (n = 8), the reference values of 207 ± 15μg and 408 ± 20μg were determined by digestion, the results were 199.8μg, 397.6μg, day Inter-precision of 3.9% and 3.4%. (n = 3). Conclusion: The method is simple, rapid and economical, and can accurately determine the concentration of tin and its compounds in the filter membrane.