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Flow injection on-line preconcentration coupled to hydride generation atomic fluorescence spectrometry for ultra-trace amounts of cadmium determination in seawater

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Abstract.

A simple flow injection on line separation and preconcentration system coupled to hydride generation atomic fluorescence spectrometry (HG-AFS) was developed for ultra-trace cadmium determination in seawater. With the sample pH kept at 3.0, the preconcentration of cadmium on the inner walls of the knotted reactor was carried out based on the retention of cadmium complex with 1-phenyl-3-methyl-4-benzoylpyrazol-5-one. A 0.2 mol L−1 HCl was introduced to elute the retained analyte complex and merge with KBH4 solution for HG-AFS detection. Under the optimal experimental conditions, an enhancement factor of 12 was obtained with a sample consumption of 12.0 mL. The limit of detection was 3.2 ng L−1 with a sample frequency of 24 h−1. The developed method was validated by the analysis of cadmium in certified reference materials, and was applied to the determination of cadmium in four seawater samples with R.S.D. of around 10%.

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Authors and Affiliations

  1. Department of Chemistry, Xuzhou Normal University, Xuzhou, P.R. China

    Hong Wu, Baixiang Du & Changchun Zhao

  2. Xuzhou Entry-Exit Inspection and Quarantine Bureau, Xuzhou, P.R. China

    Chao Fang

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  1. Hong Wu
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Correspondence to Hong Wu.

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Correspondence: Hong Wu, Department of Chemistry, Xuzhou Normal University, Xuzhou 221116, P.R. China

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Wu, H., Fang, C., Du, B. et al. Flow injection on-line preconcentration coupled to hydride generation atomic fluorescence spectrometry for ultra-trace amounts of cadmium determination in seawater. Microchim Acta 160, 173–178 (2008). https://doi.org/10.1007/s00604-007-0808-x

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