内標準法/誘導結合プラズマ発光分析法による少量青銅標準試料の分析 (<特集>ダウンサイズ化する分析化学)

概要

論文の詳細を見る
In order to accurately determine major elements (Cu, Sn, Zn and Pb) in milligram amounts of bronze reference samples, an application of ICP-AES using scandium as an internal standard element was investigated. The correlation coefficient of each major element to scandium was above 0.93 and the repeatable precision in measuring the emission intensity ratio of each major element to scandium was 0.10〜0.45% (RSD, %, n = 25), which corresponded to 1/3〜1/5times that obtained without an internal standard. In an analysis with a 10 mg amount of the sample, the relative variances for 4 major elements {Relative variance (%)= [(M_<found>-M_<cert>)/M_<cert>] × 100, where M_<found> and M_<cert> are the found and certified values, respectively.} were 0〜-1.4%, except for Pb. On the other hand, those obtained from an analysis with a 5 mg or a 2 mg amount of sample were -0.8〜-6.3%.
社団法人日本分析化学会の論文
2000-12-05