Determination of Trace Cadmium in Environment Water Samples by Flame Atomic Absorption Spectrometry Using Flow Injection On-Line Preconcentration with Double Microcolumns
KANG Wei-jun1，2, LIANG Shu-xuan2, JIA Li-hui3, XU Li-qin1, ZHAO Yan1, SUN Han-wen2
1. School of Public Health, Hebei Medical University, Shijiazhuang 050017, China 2. Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China 3. Center for Disease Control and Prevention of Hebei Province, Shijiazhuang 050021, China
Abstract：A rapid and sensitive methed for the determination of trace cadmium in environment water samples based on flow injection on-line preconcentration on two-microcolumn system-flame atomic absorption spectrometry has been developed. The cadmium in samples was sequentially retained on two microcolumns with cation exchange resin and was eluted directly in the nebulizer by 1.5 mol·L-1 HCl solution. The characteristic concentration (preconcentration time 1 min) for cadmium was 0.931 μg·L-1. The relative standard deviation at the 5 μg·L-1 level was 2.69% and the corresponding detection limit (3σ) was 0.808 μg·L-1. The method has been successfully applied to the determination of cadmium in water reference material GBW08608 and other water samples.
[1] YE Han-qing, YANG Xiang-liang, ZHOU Jing-yan(叶寒青，杨祥良，周井炎). Guangdong Trace Elements Science(广东微量元素科学)，2001, 8(3): 9. [2] SHEN Zhen-tian, CHEN Yi(沈振天, 陈 奕). Chinese J. of Anal. Chem.(分析化学), 1988, 16(7): 639. [3] SU Yao-dong, CHEN Jun(苏耀东, 陈 俊). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 1992, 12(3): 101. [4] PANG Wen-sheng, HAN Fu-gui, YAN Qing-zhi(庞文生, 韩富贵, 燕青枝). Chemical Research and Application(化学研究与应用), 1997, 9(3): 264. [5] Fand Z L, Xu S K, Zhang S C. Anal. Chim. Acta, 1984, 164(1): 41. [6] DONG Li-ping, FANG Zhao-lun(董立平, 方肇伦). Chinese J. of Anal. Lab.(分析试验室), 1993, 12(6): 55. [7] Enríquez-Domínguez M F, Yebra-Biurrun M C, Bermejo-Barrera M P. Analyst, 1998, 123(1): 105. [8] Tony K A, Kartikeyan S, Vijayalakshmy B et al. Analyst, 1999, 124(2): 191. [9] Kilian K, Pyrzyń ska K. Analytical Sciences, 2002, 18(5): 571. [10] CHEN Shu-yu, SUN Mei(陈树榆，孙 梅). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2001, 21(3): 377. [11] SUN Han-wen (孙汉文). Atomic Spectral Analysis(原子光谱分析). Beijing: Higher Education Press(北京: 高等教育出版社), 2002. 165.
