苯基荧光酮分光光度法测定微量铜  

Phenylfuoron spectrophotometric determination of microamounts of copper

作　　者：李荣勤[1] 李靖 

机构地区：[1]齐齐哈尔大学化学与化工学院,黑龙江齐齐哈尔161005 [2]齐齐哈尔市产品质量监督检验所,黑龙江齐齐哈尔161006

出　　处：《齐齐哈尔大学学报（自然科学版）》2008年第5期79-81,共3页Journal of Qiqihar University(Natural Science Edition)

摘　　要：研究了阳离子表面活性剂——溴化十六烷基三甲基铵（CTMAB）存在下，苯基荧光酮（PF）与Cu（Ⅱ）的最色反应。研究表明在pH=11时，铜与试剂形成比为1：5的紫色络合物；络合物的最大吸收波长为550nm，在此波长下测得摩尔吸光系数为2．1×10^5L/mol·cm，桑德尔灵敏度为0．00076；铜量在0-5μg／25mL范围内符合比尔定律。实验表明，此方法网收率为99．5％。In this paper a spectrophotometric method of determination of trace amounts of copper with PF is descriptived. In a mediun of pH 11 copper reacts with PF to form a 1 ： 5 complex in the presence of CTMAB and tartaric acid. It is purple. Its apparent molar abaorptivity is 2.1 × 10^5L/mol·cm at 550nm. Sandell sensitivity is 0.000 76. Beer＇s law is obeyed for copper in the concentration range of 0 to 5 μg/25mL. The experiments show that this method of recovery was 99.5%.

关 键 词：铜 苯基荧光酮 溴化十六烷基三甲基铵 分光光度法 

分 类 号：O657.31[理学—分析化学]