Fu Dayou, Yuan Dong
Material and Chemical Engineering Department, Sichuan University of Sciences and Engineering, Zigong 643000, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2007 Feb;66(2):434-7. doi: 10.1016/j.saa.2006.03.018. Epub 2006 Jul 21.
A simple and sensitive spectrophotometric method for determination of trace copper in water samples is proposed. In the presence of pH 4.6 HAc-NaAc buffer solution and surfactant polyethylene octyl phenyl ether (OP) medium, copper reacts with thiomichlersketone (TMK) to form a stable 1:4 complex. The complex Cu(II)-TMK-OP shows maximum absorbance at 500 nm with a molar absorptivity value of 5.7x10(4) l mol-1 cm-1. Beer's law is obeyed for copper concentrations in the range of 0-15 microg/25 ml. The average recovery of copper is between 95.8 and 106%. The method has been applied for determination of trace copper in different water samples with satisfactory results.
提出了一种简单灵敏的分光光度法测定水样中的痕量铜。在pH 4.6的HAc-NaAc缓冲溶液和表面活性剂聚氧乙烯辛基苯基醚（OP）介质存在下，铜与硫代米氏酮（TMK）反应形成稳定的1:4配合物。配合物Cu（II）-TMK-OP在500 nm处有最大吸收，摩尔吸光系数为5.7×10⁴ l·mol⁻¹·cm⁻¹。铜浓度在0-15μg/25 ml范围内符合比尔定律。铜的平均回收率在95.8%至106%之间。该方法已应用于不同水样中痕量铜的测定，结果令人满意。
