用邻硝基苯基荧光酮和十六烷基三甲基溴化铵分光光度法测定钢中的钼

Spectrophotometric determination of molybdenum in steels with o-nitrophenylfluorone and cetyltrimethylammonium bromide.

作者信息

Zhang-Fa H, Xi-Man L

机构信息

Department of Chemistry, East China Normal University 3663 Chung Shan Road (N). Shanghai, People's Republic of China.

出版信息

Talanta. 1988 Dec;35(12):1007-9. doi: 10.1016/0039-9140(88)80238-8.

DOI:10.1016/0039-9140(88)80238-8

PMID:18964665

Abstract

A method has been developed for determining microamounts of molybdenum(VI) in aqueous solution by means of the Mo-o-nitrophenylfluorone-cetyltrimethylammonium bromide system, in which micellar solubilization is applied. A red complex is formed in 0.2-0.6M hydrochloric acid medium. The sensitivity of the method is high, and the apparent molar absorptivity is 1.55 x 10(5) l.mole(-1). cm(-1). The absorption peak of the complex appears at 530 nm. The colour of the complex develops quickly and is stable for more than 24 hr. The composition of the complex is Mo: o-NPF = 1:1, and the system obeys Beer's law in the range 0-10 mug of Mo per 25 ml. The method has been used for the rapid determination of molybdenum in alloy steels with satisfactory results.

摘要

已开发出一种通过钼-邻硝基苯基荧光酮-溴化十六烷基三甲基铵体系测定水溶液中微量钼(VI)的方法，该体系采用了胶束增溶作用。在0.2 - 0.6M盐酸介质中形成红色络合物。该方法灵敏度高，表观摩尔吸光率为1.55×10(5) l·mol(-1)·cm(-1)。络合物的吸收峰出现在530nm处。络合物颜色显色迅速，且在24小时以上保持稳定。络合物的组成为Mo:邻-NPF = 1:1，该体系在每25ml含0 - 10μg钼的范围内符合比尔定律。该方法已用于合金钢中钼的快速测定，结果令人满意。