テルル化水素の形成とコールドトラップ法を組み合わせたテルルの原子吸光法の基礎的条件の検討

概要

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Some fundamental conditions of atomic absorption spectrometry combined with a technique of hydrogen telluride generation followed by its collection in a trap of liquid nitrogen have been investigated. Twenty ml of 5 N HCl solution containing (1〜200) ng of tellurium(IV) is placed in the reaction vessel. Four ml of 5 % NaBH_4 solution was added to the reaction vessel over a period of 15s. The generated hydrogen telluride is isolated by the gas trap immersed in liquid nitrogen and released by warming it up to room temperature. Then hydrogen telluride is transferred into an electrically heated quartz cell atomizer and the absorbance is recorded. Under the optimum conditions, the detection limit (S/N = 2) was 1 ng and the coefficients of variation were 8.7 % in ten determinations of 100 ng of tellurium. Of the elements investigated, copper, mercury, arsenic etc. interfered much with the determination of tellurium.
社団法人日本分析化学会の論文
1982-08-05