高速液体クロマトグラフィーによる微量重金属の同時定量法に関する研究

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Simultaneous determination methods for trace metals have been studied by high-performance liquid chromatography (HPLC) with photometric detection. The metals to be determined were extracted into the organic phase of a small volume or enriched on a C_<18> mini-column as their metal chelates. The extracted or enriched metal chelates were separated on a C_<18> analytical column and then detected with the usual type photometric detector. Some dithiocarbamates and β-diketonates were used as chelating agents. The HPLC methods combined with solvent extraction enabled a multielement analysis of ng/ml (ppb) levels of Cd, Ni, Pb, Zn, Cu, Hg, Co, and Bi in a 50-ml water sample. The methods were applied to multielement analyses of river water as well as several standard reference materials. The results showed good agreement with those of AAS or certified values. An on-line column enrichment method was also used for the simultaneous determination of Cd, Ni, Pb, Cu, Hg, Co, and Bi. To a 2-ml sample solution, 400 μl of a buffer solution, 100 μl of 0.01 M hexamethylenedithiocarbamate (HMDC) and 5 μl of chloroform were added. Then, a 2-ml aliquot of the resultant solution was injected onto a C_<18> mini-column. The enriched HMDC chelates were then separated on a C_<18> analytical column. The detection limits were 0.04 to 0.55 ppb, depending on the metals. The method was applied to a multielement analysis of tap water.
社団法人日本分析化学会の論文
1994-02-05

高速液体クロマトグラフィーによる微量重金属の同時定量法に関する研究

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