摘要
在钯 (Ⅱ )与对碘偶氮氯膦配合物中加入吐温 6 0 ,形成三元显色体系 ,后者的灵敏度有显著的提高 ,其表观摩尔吸光系数ε63 8=6 0× 10 4L·mol-1·cm-1,钯含量在 0 1～ 1 2mg·L-1范围内符合比耳定律 ;同时方法的选择性亦有所改善 ,可在水相中直接测定微量钯 ,常见阳离子对此反应均无干扰 ,其他贵金属离子也有数倍的允许值 ,在钯催化剂回收液和二次阳极泥的微量钯的测定中 。
A spectrophotometric method was proposed for the determination of micro amount palladium based on the reaction between palladium and chlorophosphonazo pl in the presence of tween 60. The apparent molar absorptivity was 6 0×10 4 L·mol -1 ·cm -1 at 638 nm. Beer′s law is obeyed over the range of 0 10～1 20 mg·L -1 for palladium. Meanwhile, the selectivity of method is improved also. The trace palladium may be determined in the aqueous phase directly. The reaction does not interfered by common cations. Occurrence of Au 3+ and Ag + in amount no more than fine times is allorved. Determination of trace palladium in catalytic recovery and secendary anode slime is satisfactory by this method.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2002年第3期235-237,共3页
Chinese Journal of Rare Metals
