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%.
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)