期刊
ANALYTICAL SCIENCES
卷 25, 期 1, 页码 51-56出版社
JAPAN SOC ANALYTICAL CHEMISTRY
DOI: 10.2116/analsci.25.51
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资金
- Japan Society for Promotion of Science [19350038]
Chitosan resin possessing the 4-hydroxyphthalic acid moiety (CCTS-HPA resin) was synthesized. This resin could adsorb chromium(VI) at pH 3 to 5. whereas chromium(III) could not be retained in the acidic region. The CCTS-HPA resin was used for collecting chromium(VI). and ME-03 resin Was used for collecting chromium(III) before their measurement by ICP-AES measurement. Both resins were packed in mini-columns and installed serially in it laboratory-assembled automated pretreatment system (Auto-Pret System). The system provides a highly sensitive and fully automated procedure for the speciation of chromium(III) and chromium(VI). The proposed system was Successfully applied to speciation of chromium(III) and chromium(VI) using 5 nil of water samples. The detection limits (S/N = 3) of chromium(III) and chromium(VI) were 0.06 and 0.04 mu g l(-1). respectively, along with an analysis time of 7 min 45 s for both chromium species. The lowest determinable concentrations for both chromium species were about 0.5 mu g l(-1), which was enough for the speciation of chromium in water samples.
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