長期間の保存に耐えるアンチモン(III)標準溶液 : 塩化アンチモン(III)-アセトン溶液

概要

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As the acetone solution of antimony(III) chloride was found to be very stable in a long time storage, the stability was tested by titration (potassium bromate method as well as complexometry), by colorimetry (Rhodamin B method), and by atomic absorption spectrometry (after extracted as diethyldithiocarbamate of antimony with methyl isobutyl ketone). When the (0.1〜0.01) M solution was kept in a brown glass bottle doubly stoppered by a polyethylene inner stopper and a plastic serew outer one, or preferably in a sealed ampour of brown glass, the antimony in the solution determined by the titration did not change more than 80 days, nor the analyses by colorimetry and atomic absorption spectrometry, more than one month. In addition, the acetone is easily removed from the solution by evaporation, as the acetone does not make a strong coordination bond with antimony, nor is the adduct a stable one. This is also an additional benefit of the solution in using it as a standard of antimony analysis.
社団法人日本分析化学会の論文
1976-10-10