2-ヒドロキシ-1-ナフトアルドキシムを用いるパラジウムろう中のパラジウムの抽出-吸光光度定量

概要

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An extraction-spectrophotometric method using 2-hydroxy-1-naphthaldoxime (HNA) was developed for the determination of palladium in palladium brazing filler metal. A required amount of the sample (0.1 g) was dissolved by heating in 10 ml of nitric adid (1+1). The solution was made up to 100 ml with water, from which a portion containing up to 100 μg of palladium was transferred into a 50-ml separatory funnel. Two milliliters of 0.05 M zephiramine solution and 10 ml of 2 N sulfuric acid were added, and the solution was diluted to about 20ml with water. It was shaken with 10ml of 0.01 M HNA-chloroform solution for 10min. After the organic phase was separated, a little turbidity in the organic phase was removed by centrifugation. The absorbance of the organic phase was measured at 402 nm against the reagent blank. Palladium in palladium brazing filler metals colud be determined precisely with high reproducibility.
社団法人日本分析化学会の論文
1980-02-05