エネルギー分散型けい光X線分析法による岩石及び底質試料中のクロムの定量 : ペレット作製と内部標準の有効性

概要

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Chromium in rocks and sediments was determined by energy dispersive X-ray fluorescence spectrometry, with special interest focused on the effectiveness of internal standards and the comparison of powder sample with briquet one. Determinations were based upon standard addition method. Chromium solution (10000 μg/ml) were added to 2 g powder of JB-1 and Sanshiro-ike pond sediment at the level of (100〜500)μg/g, whereas Cr_2O_3 powder was added to River Sediment (NBS SRM 1645). Vanadium and manganese originally present in the samples were used as internal standards for JB-1 and pond sediment, and Ce was added as internal standard for River Sediment. It appears that the use of internal standard does not significantly improve the precision for the determination of Cr at ppm level. Measurement on 0.5 g powder itself as a sample results in good precision and accuracy; no special pretreatment such as briquetting is necessary.
社団法人日本分析化学会の論文
1980-09-05