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研究了在聚乙二醇 PAR 硫酸铵体系中萃取光度法测定钯的条件.在pH7.40的EDTA NaOH介质中,Pd(II) PAR被萃取到聚乙二醇相,最大吸收波长为525nm,摩尔吸光系数为3.71×104L·mol-1·cm-1,钯含量在0～26.4μg/10.0mL范围内符合比耳定律,检出限为0.029μg/10.0mL.方法用于碳钯催化剂和矿样中钯分离测定,结果满意.
The conditions for the determination of palladium by extraction spectrophotometry in the system of polyethylene glycol (PAR) ammonium sulfate were studied. Pd (II) PAR was extracted into polyethylene glycol phase in pH7.40 EDTA NaOH solution, the maximum absorption wavelength was 525 nm, Moore’s absorption coefficient is 3.71 × 104L · mol-1 · cm-1, Beer’s law is obeyed in the range of 0 ~ 26.4μg / 10.0mL with a detection limit of 0.029μg / 10.0mL. Determination of palladium in ore samples, with satisfactory results.