Abstract
Fractional determination of trimethylselenonium ion(TMSe), Se(IV) and Se(VI) in water samples was studied by graphite furnace atomic absorption spectrometry. After coexisting cations formed a complex with thiosulfate to prevent being adsorbed on cation-exchange resin, separation and concentration of TMSe were carried out by column chromatography on Dowex 50 W-X8 resin. For concentration of inorganic selenium (Se(IV), Se(VI)) in water samples, column chromatography was carried out with an anion-exchange column using Dowex 1-X4 resin and the selenium were eluted simultaneously with 1 M hydrochloric acid. Se(IV) in the eluent was extracted with dithizone solution under the condition of 4 M hydrochloric acid. Se(VI) could be extracted with dithizone solution after the reduction to Se(IV) with hydroxylamine hydrochloride. In this procedure, the recovery of selenium was in the ragne of 86–102.8%, and the variation coefficient was 4.2–11.3%. The detection limit of TMSe was 10 ng/21 and that of Se(IV) and Se(VI) was 5 ng/1.
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Oyamada, N., Ishizaki, M. Fractional Determination of Dissolved Selenium Compounds of Trimethylselenonium Ion, Selenium(IV) and Selenium(VI) in Environmental Water Samples. ANAL. SCI. 2, 365–369 (1986). https://doi.org/10.2116/analsci.2.365
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DOI: https://doi.org/10.2116/analsci.2.365