Abstract：For the separation and determination of inorganic Cr(Ⅵ) and organic Cr(Ⅲ) in natural water, a sensitive and selective method was developed using a weak basic anion exchange resin micro-column and inductively coupled plasma atomic emission spectrometry (ICP-AES). Under optimized conditions, organic Cr(Ⅲ) and inorganic Cr(Ⅵ) were retained on the column, and eluted with 1.0 mol·L-1 HCl and 2.0 mol·L-1 NH4NO3＋0.5 mol·L-1 NH3·H2O respectively. Then the concentrations of Cr(Ⅵ) and organic Cr(Ⅲ) were determined by ICP-AES. The detection limits of organic Cr(Ⅲ) and inorganic Cr(Ⅵ) were 1.1 and 1.4 μg·L-1,and relative standard deviations(RSD) were 3.8％ and 5.6％ respectively. The proposed method has been applied to the determination and separation of chromium in several practical water samples with a recovery between 90.4% and 106.3%.
马红梅，朱志良*,张荣华，赵建夫 . 弱碱性阴离子交换树脂富集ICP-AES测定环境水体中Cr(Ⅵ)和有机态Cr(Ⅲ)的研究[J]. 光谱学与光谱分析, 2007, 27(01): 165-168.
MA Hong-mei, ZHU Zhi-liang*,ZHANG Rong-hua, ZHAO Jian-fu . Separation of Cr(Ⅵ) and Organic Cr(Ⅲ) in Natural Water by Weak Basic Anion Exchange Resin and Determination by ICP-AES. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(01): 165-168.
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