邻氯苯基荧光酮-溴化十六烷基三甲基铵分光光度法测定微量钪

Spectrophotometric determination of microamounts of scandium with o-chlorophenylfluorone and cetyltrimethylammonium bromide.

作者信息

Luo Z M, He W M

机构信息

Department of Chemical Engineering, Guangdong Institute of Technology, Guangzhou, People's Republic of China.

出版信息

Talanta. 1990 Jun;37(6):641-4. doi: 10.1016/0039-9140(90)80210-7.

DOI:10.1016/0039-9140(90)80210-7

PMID:18964993

Abstract

The reaction of scandium(III) with o-chlorophenylfluorone (o-CIPF) in the presence of cetyltrimethylammonium bromide (CTMAB) has been studied. In an acetate buffer at pH 4.4, a red-purple complex is obtained, with maximum absorption at 569 nm and a molar absorptivity of 1.31 x 10(5)1.mole(-1).cm(-1). The composition of the complex is found to be 1:2:2 Sc-o-CIPF-CTMAB. Beer's law is obeyed over the range 0-12 mug/25 ml scandium. The proposed method has been used for determination of trace scandium in tungsten ores after its prior separation by solvent extraction.

摘要

研究了在十六烷基三甲基溴化铵（CTMAB）存在下钪（III）与邻氯苯基荧光酮（o-CIPF）的反应。在pH 4.4的乙酸盐缓冲溶液中，得到一种红紫色络合物，其在569 nm处有最大吸收，摩尔吸光率为1.31×10⁵ L·mol⁻¹·cm⁻¹。发现该络合物的组成为1:2:2 Sc-o-CIPF-CTMAB。钪在0-12 μg/25 ml范围内符合比尔定律。所提出的方法已用于通过溶剂萃取预先分离后测定钨矿石中的痕量钪。