Application of Portable Electrokinetic Flow Analysis System for Determination of Chromium (Ⅵ) and Cadmium (Ⅱ) in Mineral Water / 分析化学
Yang Li; He Youzhao; Gan Wu er; Deng Ning; Li Min; Lin Xiangqin.
Chinese Journal of Analytical Chemistry
; (12): 555-557, 2001.
Artículo
en Zh
| WPRIM | ID: wpr-671507
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).
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