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关于PADAT及其卤代物已作为钴的优良试剂,但尚未见PADAT与钯(Ⅱ)离子显色反应的探讨,本文研究PADAT与钯离子形成络合物的条件、组成、萃取性能及其应用,实践证明,PADAT与钯在弱酸性或近中性介质中形成稳定而灵敏的紫红色络合物,可为正戊醇萃取;络合物最大吸收位于590毫微米处;克分子吸光系数为3.5×10~4;试剂对钯的灵敏度为0.003微克/厘米~2;络合物组成为Pd:PADAT=1:1;不稳定常数为2.8×10~(-7);用于催化剂和二次阳极泥中钯的测定,获得良好结果。
However, the color reaction between PADAT and palladium (Ⅱ) has not been discussed yet. In this paper, the conditions, composition, extraction properties and application of PADAT and palladium ion to form complexes are studied. Practice has proved that, PADAT and palladium in weakly acidic or near neutral medium to form a stable and sensitive fuchsine complex for n-amyl alcohol extraction; maximum absorption of the complex is located at 590 nm; molecular extinction coefficient of 3.5 × 10 4; the sensitivity of the reagent to palladium is 0.003 μg / cm 2; the composition of the complex is Pd: PADAT = 1: 1; the instability constant is 2.8 × 10 -7; The determination of palladium in the anode mud yielded good results.