2-(5-ブロモ-2-ピリジルアゾ)-5-ジエチルアミノフェノールによるアンチモンの抽出-吸光光度定量

概要

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An extraction-spectrophotometric method for the determination of antimony(III) with a reagent (Br-PADAP) in the title has been presented. To the sample solution containing antimony (III) (1〜25) μg in 2.5N sulfuric acid, were added 0.5 ml of 1.2 M potassium iodide, and then 2.5 N sulfuric acid to make its volume of about 10 ml. Antimony in the solution was extracted only once with 10 ml of 0.002 w/w % Br-PADAP benzene solution by shaking the mixture for 1 min. The absorbance of the extract was measured at 610 nm referring to its reagent blank, for (20〜30) min after the extraction. (ε=5.9×10^4 1 mol^<-1> cm^<-1>) (Antimony in 100 ml of the sample solution was also determined by this technique, if the added quantities of potassium iodide and of Br-PADAP were increased.) This method was applied to the determination of antimony in the benzene solution of antimony (III) chloride, and in each acetone solution of some organoantimony(V) compounds.
社団法人日本分析化学会の論文
1980-02-05