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| 辉光放电质谱法测定纯铂中杂质元素 |
| Determination of Impurity Elements in Pure Platinum by Glow Discharge Mass Spectrometry |
| 投稿时间：2019-11-01 |
| DOI： |
| 中文关键词: 分析化学 辉光放电质谱(GDMS) 纯铂 杂质元素 制样 |
| 英文关键词: analytical chemistry glow discharge mass spectrometry (GDMS) pure platinum impurity elements sample preparation |
| 基金项目:国家重点研发计划项目(2017YFB0305405)；国家自然科学基金(51961016) |
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| 中文摘要: |
| 采用辉光放电质谱法(GDMS)测定纯铂中杂质元素含量，获得了仪器最佳工作条件，并对比了不同样品制备方式对测定结果的影响。结果表明，GDMS对大部分杂质元素的检出限低至10-9量级，对含量在10-6的杂质元素，测定相对标准偏差(RSD)在10%以内，可满足高纯铂的测定要求。与ICP-AES和ICP-MS测定结果对比表明，采用仪器提供的相对灵敏度因子(RSF)所得到的半定量结果与前二者存在一定的偏差，有必要采用标准样品进行RSF的校准。纯铂样品采用金属片、铟片粘附或粉末压片均可得到相似的检测结果，其中粉末压片法在标样制作中具有较好的应用前景。 |
| 英文摘要: |
| The content of impurity elements in pure platinum was determined by glow discharge mass spectrometry (GDMS). The optimum working conditions were obtained, and the influence of different sample preparation methods on the determination results was compared. The results showed that the detection limit of most impurity elements by GDMS was as low as 10-9, and that the relative standard deviation (RSD) of impurities with a content of 10-6 was less than 10%, which can meet the requirements of high purity platinum determination. Compared with the measurement results of ICP-AES and ICP-MS, the semi-quantitative results obtained by using the relative sensitivity factor (RSF) provided by the instrument have a certain deviation from the former two, so it is necessary to use standard samples for RSF calibration. Similar detection results for pure platinum samples can be obtained by using metal sheet, indium sheet adhesion or powder tableting. The powder compression method has a good application prospect in the preparation of standard samples. |
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