Preconcentration and graphite furnace AAS determination of ultratrace elments in natural waters by utilizing synergistic extraction.

UEDA Kazumasa, KITAHARA Shun, KUBO Katsutoshi, YAMAMOTO Yoshikazu

doi:10.2116/bunsekikagaku.36.11_728

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協同抽出を利用する天然水中の超微量成分の予備濃縮／黒鉛炉原子吸光分析
キョウドウチュウシュツオリヨウスルテンネンスイチュウノチョウビリ
協同抽出を利用する天然水中の超微量成分の予備濃縮/黒鉛炉原子吸光分析(<特集>超微量分析のための前処理と予備濃縮)

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A simple, rapid and sensitive method for AAS determination of Cd, Mn, Pb, Cu and Co in natural waters has been developed by utilizing synergistic extraction with STTA-TOPO-cyclohexane solution. Trace metals could be quantitatively separated and concentrated from natural water matrix by using a low concentration (1 mM level) of STTA and TOPO. The synergistic extract was directly injected into the graphite furnace and the reproducible absorption signal with little memory effect was obtained. The extracted adduct would produce multipliing effects on the AAS measurement, e.g., the prevention of volatilization of metal on the ashing stage, the depression of metal oxide formation and the extension of thermal contact area in the graphite furnace. Thus, the sensitization effect was recognized, simultaneously the depression of the interferences. The proposed method was applied to the analysis of river water, using a small volume of sample solution, and trace metals were successively determined within the relative standard deviation of 10%.

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BUNSEKI KAGAKU

BUNSEKI KAGAKU 36 (11), 728-734, 1987

The Japan Society for Analytical Chemistry

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