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| Preconcentration and Determination of Chromium Species Using Octadecyl Silica Membrane Disks and Flame Atomic Absorption Spectrometry | |
| 摘 要： | |
| 关 键 词： | 固体相位萃取 钠 二乙基 二硫代氨基甲酸盐 吸附作用 二氧化硅 |
| 收稿时间： | 2006-07-03 |
| 修稿时间： | 2007-07-29 |
Preconcentration and Determination of Chromium Species Using Octadecyl Silica Membrane Disks and Flame Atomic Absorption Spectrometry |
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| Authors: | Ali MOGHIMI Mohammad SABER‐TEHRANI Syed WAQIF‐HUSAIN Majid MOHAMMADHOSSEINI |
| Institution: | 1. Department of Chemistry, Islamic Azad University, Varamin Campus, Varamin, Iran;2. Department of Chemistry, Faculty of Science, Science and Research Campus, Islamic Azad University, Tehran, Iran;3. Fax: (0098)‐292222‐5010;4. Department of Chemistry, Islamic Azad University of Shahrood, Shahrood, Iran |
| Abstract: | A novel and selective method for the fast determination of trace amounts of chromium species in water samples has been developed. The procedure is based on the selective formation of chromium diethyldithiocarbamate complexes at different pH in the presence of Mn(II) as an enhancement agent of chromium signals followed by elution with organic eluents and determination by atomic flame absorption spectrometry. The maximum capacity of the employed disks was found to be (396±3) µg and (376±2) µg for Cr(III) and Cr(VI), respectively. The detection limit of the proposed method is 49 and 43 ng·L?1 for Cr(III) and Cr(VI), respectively. The proposed method was successfully applied for determination of chromium species Cr(III) and Cr(VI) in different water samples. |
| Keywords: | solid phase extraction sodium diethyldithiocarbamate flame atomic absorption spectrometry octadecyl silica membrane disk |