钯在酸性溶液中与过量的I~-生成配位阴离子[PdI_n]-~(n-2)~-,再与R6G的阳离子产生离子缔合反应,生成电中性的蓝色缔合物沉淀,加入PVA后沉淀溶解,可以进行水相直接测定,本文拟定的分光光度法灵敏度高、稳定性较好,克服了萃取光度分析法的缺点,应用于阳极泥中钯的测定,得到较满意的结果。 Palladium in an acidic solution with an excess of I ~ - to generate coordination anions [PdI_n] - ~ (n-2) ~ -, and R6G cation ion association reaction, the formation of electrically neutral precipitation of blue association , After the addition of PVA, the precipitate is dissolved and the aqueous phase can be directly measured. The spectrophotometry developed in this paper has high sensitivity and good stability, overcomes the shortcomings of extraction spectrophotometry, and is applied to the determination of palladium in anode slime. result.