新试剂二溴氟基偶氮氟胂分光光度法快速测定热镀锌合金中微量铈  

Rapid determination of trace element cerium in thermal platting zinc alloy by spectrophotometric method with a new chromogenic reagent DBF-FAsA

作　　者：杨姣[1] 凌程凤[1] 徐峰[1] 宗俊[1] 

机构地区：[1]华东师范大学化学系,上海200062

出　　处：《分析试验室》2005年第6期1-4,共4页Chinese Journal of Analysis Laboratory

摘　　要：报道了新试剂DBF-FAsA的合成及其应用于测定锌合金中添加微量元素铈量的方法。在强酸性体系中铈与二溴氟基偶氮氟砷(DBF-FAsA)形成蓝紫色配合物,其最大吸收波长为624nm,表观摩尔吸光系数ε为1.20×105L·mol-1·cm-1,线性范围为0～1.0μg/mL。该法可用于锌合金或中间锌合金材料中微量铈的测定。This paper reported the synthesis of a new reagent BBF-FAsA and developed a simple and rapid spectrophotometric method for the determination of trace cerium in alloy with DBF-FAsA. In a strong acid medium cerium with the new chromogeric reagent DBF-FAsA forms a violet-blue stable complex which shows maximum absorption at 624 nm with a molar absorption coefficient of 1.20×10~5 L·mol^(-1)·cm^(-1). Beer′s law is obeyed in the range of 0～1.0 μg/mL for cerium. This method has been used for the determination of trace cerium in zinc alloy with satisfactory results.

关 键 词：BBF-FAsA 铈 分光光度法 锌合金 

分 类 号：O657.32[理学—分析化学]