Application of Portable Electrokinetic Flow Analysis System for Determination of Chromium (Ⅵ) and Cadmium (Ⅱ) in Mineral Water
- VernacularTitle:便携式电动流动分析系统同时富集测定矿泉水中铬(Ⅵ)和镉(Ⅱ)
- Author:
Yang Li
;
He Youzhao
;
Gan Wu er
;
Deng Ning
;
Li Min
;
Lin Xiangqin
- Publication Type:Journal Article
- From:
Chinese Journal of Analytical Chemistry
2001;29(5):555-557
- CountryChina
- Language:Chinese
-
Abstract:
The improvement of the electroosmotic pump properties and the effects of the bi-directional electrostacking system on the pre-concentration factor were investigated.A portable electrokinetic flow analysis system with electroosmotic driving and bi-directional electrostacking unit was introduced.The improved system with graphite furnace atomic absorption spectrometry was employed to separate,pre-concentrate and determine Cr(Ⅵ) and Cd(Ⅱ)in mineral water.The detection limit of Cr(Ⅵ)and Cd(Ⅱ)was 9 ng/L and 10 ng/L(3б of blank,n=11),respectively.Their recoveries of 200ng/L Cr(Ⅵ) and 100ng/L Cd(Ⅱ) added to samples were(105～107)±2% and (104～106)±2%(n=3).
