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| Direct Determination of Trace Impurity Elements in High Purity Rare Earth Phosphor Powder by Alkali Fusion-Inductively Coupled Plasma Mass Spectrometry |
| Received:November 28, 2013 Revised:January 24, 2014 |
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| DOI：doi:10.3969/j.issn.2095-1035.2014.02.007 |
| KeyWord:alkali fusion;rare earth phosphor;impurity elements;ICP-MS |
| Author | Institution |
| LUAN Rijian |
中国冶金地质总局 山东局测试中心，济南 |
| LI Yanxiang |
中国冶金地质总局 山东局测试中心，济南 |
| ZHANG Juan |
山东省产品质量检验研究院, 济南 |
| ZHANG Yuqiang |
中国冶金地质总局 山东局测试中心，济南 |
| MA Ming |
中国冶金地质总局 山东局测试中心，济南 |
| LI Zhaoyan |
中国冶金地质总局 山东局测试中心，济南 |
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| Abstract: |
| A new analytical method was proposed to directly determine trace impurity elements (non-rare-earth elements and rare-earth elements) in rare earth phosphor powder by alkali fusion - inductively coupled plasma mass spectrometry. The results showed that NaCO3-H3BO3 mixed flux has the minimum matrix effects. The sample mixed with flux can be digested completely at 1000℃ for 30min, the frit was extracted by HNO3(2+3). Then the sample was constant to volume and was directly determined by ICP-MS using multi-element standard curve. The detection limits for the method were found for non-rare-earth element in the range of 0.007~1.036 μg/g, and for rare-earth element in the range of 0.001~0.057 μg/g. The relative standard deviation (RSD) was less than 10%. The method has a simple sample pretreatment procedure, low detection limit, good reproducibility, providing reliable analytical methods for the quality control of the high purity rare earth phosphor powder products. |
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