| 刘江斌,牛红莉.CCD-1原子发射光谱法快速测定矿石中锡元素[J].甘肃地质,2023,(4):79-82 |
| CCD-1原子发射光谱法快速测定矿石中锡元素 |
| Rapid Determination of Tin in Ore Samples ｂy CCD-1 Actomic Emission Spectrometry |
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| DOI： |
| 中文关键词: CCD-1原子发射光谱法 矿石 锡 |
| 英文关键词:CCD-1 atomic emission spectrometry ore samples tin |
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| 中文摘要: |
| 本文以K2S2O7、NaF、Al2O3、NH4I和C粉做为缓冲剂，Ge元素做内标，试样与缓冲剂1 ∶ 1混合均匀后用杯状带颈碳电极直接双份装样。利用原子发射光谱法，采用交流电弧激发火焰光源对试样燃烧以摄取锡元素多条光谱线。使用新型全自动CCD测光系统，以Ge 270. 963 nm为内标线，选择了波长分别为283. 993 nm，285. 079 nm和281. 358 nm 的三条不同灵敏度的Sn元素谱线，对矿石中中、低及微量锡元素进行了测试，解决了传统原子发射光谱法只能进行微量元素分析无法对中低含量准确测试的缺陷，也克服了化学仪器法流程复杂、干扰严重的不足。本法不需要对试样进行稀释，就能对未知含量范围的试样直接测试，有效拓宽了锡元素的测试范围：0. 001 × 10-2 ~ 15. 00 × 10-2，分析数据与参考值和原子荧光测试值相吻合。方法操作简便、快速， 用于样品测试取得了满意的效果。 |
| 英文摘要: |
| Using atomic emission spectrometer, select K2S2O7，Al2O3 and NH4I as buffer, Ge as internal standard, the sample is mixed with buffer 1 ∶ 1, then the sample is loaded by cup-shaped carbon electrode with neck. An AC arc was used to ignite the sample with a Atomic emission spectroscopy flame to absorb many spectral lines of tin. Using a new full-automatic CCD photometry system, three Sn characterislic spectral lines with different sensitivities at 283. 993 nm, 285. 079 nm and 281. 358 nm were selected with GE 270. 963 nm as the internal standard line, the medium and low levels of tin and trace elements in the ore were tested, and the defect that traditional Atomic emission spectroscopy can only carry out micronutrient analysis and can not accurately test the medium and low levels of tin was solved, it also overcomes the disadvantages of complex process and serious interference of chemical instrument method. This method can be used to directly test samples with unknown content range without diluting the samples, which effectively expands the test range of tin element: 0. 001 × 10-2 ~ 15. 00 × 10-2, the analytical data were in good agreement with the reference values and the atomic fluorescence measurements. The method is simple and rapid, and has been applied to the determination of samples with satisfactory results. |
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