钯(Ⅱ)-对乙酰基偶氮氯膦-吐温-80用于微量钯的分光光度测定  

Spectrophotometric Determination of Trace Pa in Pa(Ⅱ)-Chlorophosphonazo-PA-Tween-80 System

作　　者：刘锡林[1] 张伏龙[1] 李琼[1] 

机构地区：[1]甘肃联合大学理工学院,甘肃兰州730000

出　　处：《甘肃联合大学学报（自然科学版）》2004年第3期43-44,共2页Journal of Gansu Lianhe University :Natural Sciences

摘　　要：在钯( )与对乙酰基偶氮氯膦络合物的溶液中加入吐温-80,可形成稳定的三元显色体系.其灵敏度显著提高,表观摩尔吸光系数ε650=8.0×104L·mol-1·cm-1,钯含量在0.1～1.0μg·mL-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,在钯催化剂及二次阳极泥微量钯的测定中,获得满意结果.The condition of colour reaction of Pa(Ⅱ) with chlorophosphonazo-PA in the presence of tween-80 are studied.Palladium is directly determined in aqueous solution.A highly sensitive Spectrophotometric procedure is investigated for the determination of trace palladium.The molar absorptivity is 8.0×10~4L·mol^(-1)·cm^(-1).Beer's law is obeyed in the range from 0.1 to 1.0μg·mL^(-1) for Pa(Ⅱ) contents.Meanwhile,the selectiveness of method has good progress to the determination of trace palladium in the catalyst with satisfactory results.

关 键 词：钯 对乙酰基偶氮氯膦 吐温-80 分光光度分析 双偶氮试剂 

分 类 号：O614.823[理学—无机化学] O657.3[理学—化学]