Speciation of Iron Using Capillary Electrophoresis Inductively Coupled Plasma Atomic Emission Spectrometry
DENG Bi-yang1, ZENG Chu-jie1, CHAN Wing-Tat2
1. College of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin 541004, China 2. Department of Chemistry, the University of Hong Kong, Hong Kong, China
Abstract:The separation of iron species, e.g. Fe2+-Fe3+, Fe2+-Fe(phen)2+3, and Fe2+-Fe3+, by mixing with complexing reagents of o-phenanthroline and EDTA, and Fe2+-Fe3+ with o-phenanthroline was developed by capillary electrophoresis inductively coupled plasma atomic emission spectrometry(CE-ICP-AES). The effects of electrophoresis conditions such as voltage, buffer solution pH, and complex concentration on iron species are discussed. Satisfactory separation conditions for iron speciation have been acquired. Cations and anions, containing complexing agents, do not interfere in the separation of iron species. The method has advantage to CE-UV.
[1] Yamauchi H. Fowler B A. In Arsenic, In The Environment, Part Ⅱ, New York: Wiley, 1994. 35. [2] Olesick J W, Kinzer J A, Olesick S V. Anal. Chem., 1995, 67:1. [3] YE Mei-ying, YIN Xue-feng, FANG Zhao-lun(叶美英, 殷学锋, 方肇伦). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2003,23(1):89. [4] YAN Xiu-ping, NI Zhe-ming(严秀平, 倪哲明). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2003,23(5):945. [5] KANG Jian-zhen, DUAN Tai-cheng,LIU Jie,et al(康建珍, 段太成, 刘 杰, 等). Chinese J. Anal. Chem.(分析化学),2003,31(11):1385. [6] LI Yu, DONG De-ming, YANG Fan, et al(李 鱼, 董德明, 杨 帆, 等). Journal of Jilin University(吉林大学学报), 2003, 41(3):374. [7] LIU Er-bao, WEI Hong-qing, CHENG Jie-ke(刘二保, 卫洪请, 程介克). Chinese Journal of Analytical Science(分析科学学报),2002, 18(4): 344. [8] Deng B Y,Chan W T. J. Chromatogr. A, 2000, 891: 139. [9] Sillen L G. Martell A E. Stability Constants of Metal-Ion Complexes. London: Chemical Society, 1964. 665; 636. [10] Christian G D. Analytical Chemistry (Fourth Edition). New York: John Wiley & Sons, 1994. 646. [11] Xu J, Che P, Ma Y. J. Chromatogr. A, 1996, 749: 287. [12] Arce L, Ríos A, Valcárcel M J. Chromatogr. A, 1997, 791: 279.