ポスター発表
- 第2日 5月16日（火） P会場（ホワイエ，会議室1004-1007）
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2P-39 PDF
単一粒子ICP質量分析法を用いたレーザーアブレーション生成粒子の個別元素分析
Data quality of elemental analysis obtained by laser ablation-ICP-mass spectrometry (LA-ICP-MS) severely depends on the LA process, and thus, further understanding of the LA process is a key issue. Principally, production of coarse particles during the LA process can cause poor analysis repeatability and accuracy of the measurements. In terms of the analytical accuracy of elemental ratio analysis, variations of particle-size dependent chemical compositions, transportation efficiency, and ionization efficiency of elements in ICP causes systematical error in elemental analyses (i.e., elemental fractionation).
In this study, to investigate size-related variations of the elemental compositions, Zn/Cu values for individual particles were monitored using combination of an in-house micron-resolution femtosecond LA system and a high-time-resolution multiple-collector ICP-MS (HTR-MC-ICP-MS) system. Based on the resulting elemental ratio analysis from individual particles, bimodal compositional distributions composed of pure-Cu particles and Zn-enriched particles were obtained. This can be a potential cause of the elemental fractionation found in the LA-ICP-MS measurements. The bimodal variations in the measured Zn/Cu values can be attributable to early generation of pure-Cu particles and subsequent condensation of Zn on the surface of pure-Cu particles due to the fractional condensation of Cu with the higher boiling temperature than Zn.