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.
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
