2,9-二甲基-1,10-菲罗啉荧光光度法测定痕量铟

Study on Fluorimetric Determination of Trace Indium(Ⅲ) with 2, 9-Dimethyl-1, 10-phenanthroline

本文报道了以2,9-二甲基-1,10-菲罗啉(DMPH)荧光光度法测定痕量铟的新方法。实验表明,钢能很快与DMPH在pH4.0～8.7形成1:1的络合物。络合物的激发和发射波长分别为312nm,423nm。量子产率为0.35。检出限为1.0ng/g,铟量在0～1.0嵋/25mL呈线性关系。该法已成功应用于纯锡和纯铅中痕量铟的测定。

A new method for the fluorimetric determination of trace indium (Ⅱ) with 2, 9-dimethyl-1, 10-phenanthroline(Ⅰ) is described. In a pH4.0～8.7 buffer medium, In(Ⅲ) reacts quickly with (Ⅰ) to form an 1:1 complex. The fluorescence is measured at 423nm with excitation wavelength of 312nm. The quantum yield is 0.35. The linear range is 0～1.0μg/25mL. The method established can be used for the determination of indium(Ⅲ) in pure tin and lead.