分光光度法测定痕量钯

A Spectrophotometric Method for the Determination of Trace Palladium(Ⅱ)

中文关键词:  钯  甲基紫  溴化钾  分光光度法

英文关键词:palladium  methyl violet  potassium bromide  spectrophotometric method

中文摘要:

      在pH为7.50的条件下,Pd²⁺与甲基紫、溴化钾反应形成紫色缔合物,吸收峰位于580 nm,Pd²⁺浓度在100～800 μg/L范围内与吸光度成正比,表观摩尔吸光系数ε₅₈₀=2.4×10⁵L/(mol·cm).方法操作简便,灵敏度高,用于试样中痕量Pd²⁺的测定,结果令人满意.

英文摘要:

      Palladium(Ⅱ) reacts with methyl violet and potassium bromide in the presence of NH₃ to form a violet complex. The ion-association complex exhibits maximum absorption at 580 nm with an apparent molar absorptivity of 2.4×10⁵ L/(mol·cm). Beer's law is obeyed in the range of 100～800 μg/L for Palladium(Ⅱ). The method is easy to operation and highly sensitive. It has been applied for the determination of Palladium(Ⅱ) in samples with satisfactory results.