双波长等吸收点光度法同时测定矿石中铂和钯

Simultaneous Determination of Platinum and Palladium in Ores by Dual-Wavelength Equioalent Absorbance Point Spectrophotometry

在SnCl_2存在的1mol/LHCI溶液中,用双硫腙-四氯化碳(H_2D_2-CCl_4)溶液同时萃取Pd和Pt。选择参比波长λ_1=776.6nm,测定波长λ_2=638.0nm,双波长等吸收点光度法测定Pd;再选择Pt的λ_(max)(720nm)单波长法测定Pt。方法可用于矿石中Pt和Pd的同时测定。

In the presence of stannous chloride, platinum and palladium are simultaneously extracted with dithizone in carbon tetrachloride solution from 1 mol/L HC1. Dual wavelength equivalent absorbance point method is used for the determination. For Pd the selected reference wavelength λ1 is 776. 6nm, and the measurement wavelength λ2 is 638. 0 nm. Pt is determined by single wavelength method, λmax = 720nm. The method can be used for the determination of Pd and Pt in ores.