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A Simple and Sensitive Flow-Injection On-line Preconcentration Coupled with Hydride Generation Atomic Fluorescence Spectrometry for the Determination of Ultra-trace Lead in Water, Wine, and Rice

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Abstract

A simple and sensitive flow-injection on-line separation and preconcentration system coupled to hydride generation atomic fluorescence spectrometry (HG-AFS) was developed for ultra-trace lead determination in water, wine, and rice samples, with the salient advantages of its minimization of transition-metal interferences and tolerance to an ethanol matrix. A lead hydroxide precipitate was achieved by the on-line merging of a sample and an ammonium buffer solution and collected onto the inner walls of a knotted reactor (KR). Removal of the residual solution from KR was achieved by air flow, and dissolution of the precipitate was carried out by using 0.2 mol l−1 HCl. With a sample consumption of 11.7 ml, an enhancement factor of 16 was obtained at a sample throughput of 30 h−1. The limit of detection (3s) was 16 ng l−1 and the precision (RSD) for 1.0 μg l−1 Pb was 3.4%.

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Key Laboratory of MOE for Life Science & State Key Laboratory of Coordination Chemistry, Analytical Center, Nanjing University, Nanjing, 210093, China

    Hong Wu, Yan Jin & Shuping Bi

  2. Department of Chemistry, Xuzhou Normal University, Xuzhou, 221116, China

    Hong Wu

  3. Department of Applied Chemistry, East China Institute of Technology, Jiangxi, 344000, China

    Mingbiao Luo

Authors
  1. Hong Wu
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  2. Yan Jin
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  3. Mingbiao Luo
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  4. Shuping Bi
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Correspondence to Shuping Bi.

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Wu, H., Jin, Y., Luo, M. et al. A Simple and Sensitive Flow-Injection On-line Preconcentration Coupled with Hydride Generation Atomic Fluorescence Spectrometry for the Determination of Ultra-trace Lead in Water, Wine, and Rice. ANAL. SCI. 23, 1109–1112 (2007). https://doi.org/10.2116/analsci.23.1109

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  • DOI: https://doi.org/10.2116/analsci.23.1109

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