Preconcentration and Determination of Chromium Species Using Octadecyl Silica Membrane Disks and Flame Atomic Absorption Spectrometry
Ali MOGHIMI
Department of Chemistry, Islamic Azad University, Varamin Campus, Varamin, Iran
Department of Chemistry, Faculty of Science, Science and Research Campus, Islamic Azad University, Tehran, Iran
Fax: (0098)-292222-5010
Search for more papers by this authorMohammad SABER-TEHRANI
Department of Chemistry, Faculty of Science, Science and Research Campus, Islamic Azad University, Tehran, Iran
Search for more papers by this authorSyed WAQIF-HUSAIN
Department of Chemistry, Faculty of Science, Science and Research Campus, Islamic Azad University, Tehran, Iran
Search for more papers by this authorMajid MOHAMMADHOSSEINI
Department of Chemistry, Islamic Azad University of Shahrood, Shahrood, Iran
Search for more papers by this authorAli MOGHIMI
Department of Chemistry, Islamic Azad University, Varamin Campus, Varamin, Iran
Department of Chemistry, Faculty of Science, Science and Research Campus, Islamic Azad University, Tehran, Iran
Fax: (0098)-292222-5010
Search for more papers by this authorMohammad SABER-TEHRANI
Department of Chemistry, Faculty of Science, Science and Research Campus, Islamic Azad University, Tehran, Iran
Search for more papers by this authorSyed WAQIF-HUSAIN
Department of Chemistry, Faculty of Science, Science and Research Campus, Islamic Azad University, Tehran, Iran
Search for more papers by this authorMajid MOHAMMADHOSSEINI
Department of Chemistry, Islamic Azad University of Shahrood, Shahrood, Iran
Search for more papers by this authorAbstract
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.
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