原子发射光谱法快速测定矿石中锡

利用原子发射光谱仪，以K₂S₂O₇、Al₂O₃、NH₄I为缓冲剂，Ge做内标,采用深孔电极装样，通过选择多条不同灵敏度的波长谱线，对矿石中、低及微量锡元素进行了测试，有效拓宽了锡元素的测试范围，可以对矿石中0.001%~10%的锡含量进行测试。方法用于标准样品和未知试样的测试，并用碘量法进行了对比验证，结果表明，分析结果与认证值和化学值相吻合，12次测定结果的相对标准偏差小于5%。方法可用于多种矿石中不同含量范围锡元素的测定。

Rapid determination of tin in ore by atomic emission spectrometry

The medium, low and trace tin in ore were measured on atomic emission spectrometer by selecting several wavelength lines with different sensitivities. K₂S₂O₇, Al₂O₃ and NH₄I were used as buffer agent, and Ge was used as internal standard. The sample was loaded by deep-hole electrode. This method effectively broadened the measuring range of tin. The content of tin in range of 0.001%-10% in ore could be determined. This method was applied to the determination of standard sample and unknown sample. The results were compared and verified with iodometry. It was found that, the determination results were consistent with those obtained by chemical method. The relative standard deviation (RSD, n=12) was less than 5%. This method could be used in the determination of tin in various ores with different content range.