苯基荧光酮分光光度法测定微量铜

Phenylfuoron spectrophotometric determination of microamounts of copper

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%.