分光光度法测定钯的初探

Discussion of Spectrophotometric Determination of Palladium

Pd(Ⅳ)与结晶紫在亚硝基R盐的存在下可发生氧化还原褪色反应,最大吸收峰位于波长590nm处。钯浓度在 0．2mg/L-2．0mg／L范围内服从比尔定律,回归方程:ΔA=0．402C-0．0012(C为mg／LPd(Ⅳ)),r=0．9990,标准偏差S=1．5％。

In the presence of Nitroso-Rsalt, Palladium （Ⅳ） would react with Crystal Violet with Oxidation-Reduction fading colour reaction. The apparent absorptivity was found at 590 nm. In the range of 0.2 to 2.0 mg/L, Palladium （ Ⅳ ） obeyed Beer＇s law. The linear regression equation was △A=0.402C -0.0012（Where C is mg/L of Palladium （Ⅳ） ）, r=0.9990. The RSD for the determination of 1.0 mg/L of Palladium （Ⅳ） was 1.5% （n=8）. The detection limits of method was 0.112mg/L.