The precipitation of traces of copper, cadmium, and lead with 6-anilino-1,3,5-triazine-2,4-dithiol and its application to X-ray fluorescence spectrometry.
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概要
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A selective enrichment procedure for copper, cadmium, and lead is described. This method is based on precipitating the three elements with 6-anilino-1,3,5-triazine-2,4-dithiol (ATD) or with a combination of ATD and benzyldimethyltetradecylammonium chloride (BMTAC), filtering the precipitates to form a suitable X-ray sample, and then analyzing the sample by means of X-ray fluorescence. Microgram amounts of the three elements were precipitated quantitatively with ATD from 50 cm<SUP>3</SUP> or less of aqueous solutions of pH 7. Several to several tens mg amounts of such other elements as aluminium, iron(III), vanadium(V), zinc, arsenic(III, V), nickel, cobalt, and manganese(II) do not form any precipitates in the presence of citrate. Quantitative recoveries of the three elements from aqueous solutions ranging from 200 to 500 cm<SUP>3</SUP> were also possible when BMTAC was present as a coagulant aid. ATD was used for the determination of the three elements in reference materials (Orchard Leaves and Pepperbush Leaves). The results agreed with the certified values and with those obtained by isotope-dilution mass-spectrometry, and the precisions were satisfactory. The three elements in hot-spring water at levels from several to several tens ppb were determined by using a combination of ATD and BMTAC.
- 公益社団法人 日本化学会の論文
著者
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Ueda Takashi
Department Of Applied Biology And Chemistry Tokyo University Of Agriculture
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Watanabe Hiroto
Department of Applied Chemistry Muroran Institute of Technology
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Ueda Takashi
Department of Applied Chemistry, Muroran Institute of Technology
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