スルホクロロフェノールSを発色剤とするパラジウム(II)の吸光光度定量

概要

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A spectrophotometric method is described for the determination of palladium(II) with Sulfochlorophenol S (abbreviated as SCPS). SCPS reacts with palladium in acidic medium to form a blue colored complex. The maximum absorption of the complex is at 643 nm (against the reagent blank). Recommended procedure is as follows: Into a 25 cm3 volumetric flask transfer a sample solution containing less than 64 *g of palladium. Add 10 cm^3 of 2 × 10^<-4> mol dm^<-3> SCPS solution, 1 cm^3 of 0.25 mol dm^<-3> perchloric acid, and 1 cm^3 of 2.5 mol dm^<-3> sodium perchlorate solution; dilute to about 20 cm^3 with distilled water. Support the flask in boiling water for five min. Cool to room temperature, dilute to the mark with water. Measure the absorbance at 643 nm against the reagent blank prepared with the same method to do the sample. Beer's law was applied in the range up to 64 *g of palladium. The apparent molar absorptivity was 4.2 × 10^4 dm^3 mol^<-1> cm^<-1>, and the Sandell's sensitivity of the reaction was 0.002_5 *g cm^<-2>. Chloride, nitrate, and sulfate did not interfere at 3000-fold ratio to palladium. Fluoride and tartrate (1000-fold to palladium) , platinum(IV) (200-fold) did not interfere with the determination.
社団法人日本分析化学会の論文
1982-12-05