用镉试剂和曲拉通X-100分光光度法测定废水中微量镉

Spectrophotometric determination of micro amounts of cadmium in waste water with cadion and triton X-100.

作者信息

Chung-Gin H, Chao-Sheng H, Ji-Hong J

机构信息

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

出版信息

Talanta. 1980 Aug;27(8):676-8. doi: 10.1016/0039-9140(80)80210-4.

DOI:10.1016/0039-9140(80)80210-4

PMID:18962757

Abstract

A spectrophotometric method for determination of micro amounts of cadmium in waste water with Cadion and Triton X-100 is described. The interference of foreign ions can be eliminated by masking with an ascorbic acid-Rochelle salt-potassium cyanide-potassium fluoride mixture. After demasking with formalin, cadmium is determined directly in aqueous solution without separation. Beer's law is obeyed for 0-8 mug of Cd in 25 ml of solution. The method is more sensitive than the dithizone method, its apparent molar absorptivity at 480 nm being 1.19 x 10(5) 1. mole(-1). cm(-1). Results obtained by using the proposed method on waste water samples agree well with those obtained by atomic-absorption spectrophotometry.

摘要

描述了一种用镉试剂和曲拉通X-100分光光度法测定废水中微量镉的方法。用抗坏血酸-酒石酸钾钠-氰化钾-氟化钾混合物掩蔽可消除外来离子的干扰。用福尔马林解蔽后，无需分离即可直接在水溶液中测定镉。在25毫升溶液中，0-8微克镉符合比尔定律。该方法比双硫腙法更灵敏，其在480纳米处的表观摩尔吸光率为1.19×10(5) 升·摩尔(-1)·厘米(-1)。用该方法对废水样品进行测定的结果与原子吸收分光光度法所得结果吻合良好。