期刊
TALANTA
卷 56, 期 4, 页码 681-687出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0039-9140(01)00632-4
关键词
8-hydroxyquinoline immobilized polyacrylonitrile fiber; chromium(III); chromium(VI); inductively coupled plasma mass spectrometry; river and reservoir water
A rapid and simple method has been developed for the separation of chromium (III) and Cr(VI) species in river and reservoir water. Chromium (III) can be chelated with 8-hydroxyquinoline immobilized polyacrylonitrile (PAN) fiber, whereas Cr(VI) cannot. Chelated Cr(III) can be eluted with 2 mol l(-1) HCl-0.1 mol l(-1) HNO3. Cr(VI) in the filtrate and Cr(III) in the eluant were determined by inductively coupled plasma mass spectrometry. The effect of pH, sample flow rate, eluant type and its volume on the concentration effectiveness of Cr(III) was investigated. The recommended method has been applied for the separation and determination of Cr(III) and Cr(VI) in river and reservoir water. The results indicated that the recovery of each individual Cr species ranged from 96 to 107% and the R.S.D. were found to be <10% at the level of ng ml(-1). The effect of HNO3 added in the sampling procedure was also evaluated. (C) 2002 Elsevier Science B.V. All rights reserved.
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