苯基荧光酮－TritonX－100荧光熄灭法测定微量钼研究

A Fluorescence Quenching Method for the Deter-mination of Molybdenum with Phenylfluorone in thePresence of Triton X-100

本文用荧光熄灭法研究了苯基荧光酮－ＴｒｉｔｏｎＸ－１００－Ｍｏ（Ⅵ）体系的测定方法及条件。在ｐＨ１．０～３．０的盐酸介质中，Ｍｏ（Ⅵ）检测限为０．２μｇ／２５ｍＬｆｆ在０．２～２．０μｇ／２５ｍＬ范围内具有线性关系。本法灵敏度高，选择性好，用于检测球墨铸铁中的微量钼，结果满意。

Mo(Ⅵ)in nodular cast iron was rapidly deter-mined by fluorometric quenching method withphenylfluorone and triton X-1 00. In a strong acidmedium,Mo (Ⅵ).PF and tritonX-100 react to formacomplex. Its cornposition was established by isomolarand continuous variation methods as Mo(Ⅵ):PF=1:2. Its maximum excitation wavelength is 500nm,and the maximum ernission wavelength is510nm. Thelinear range is at 0.2～2. 0μg/25mL and Mo(Ⅵ)hasadetection limit of 0.2μg/25mL. The method is selec-tive and highly sensitive to molybdenum.