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Issue 7, 2018
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A miniaturized UV-LED photochemical vapor generator for atomic fluorescence spectrometric determination of trace selenium

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Abstract

A miniaturized UV-LED photochemical reactor is proposed for selenium photochemical vapor generation (Photo-CVG). The miniaturized Photo-CVG reactor with a coin size mainly consists of an ultraviolet light-emitting-diode (UV-LED) and a quartz coil with nano-TiO2 coating on its inner wall. It was coupled with an atomic fluorescence spectrometer (AFS) as a sample introduction device for trace selenium determination. The nano-TiO2 coating process, UV-LED wavelength and correlative experimental parameters as well as potential interference were investigated in detail. Under optimized experimental conditions, limits of detection of 0.21 and 0.28 μg L−1 for Se(VI) and Se(IV) were obtained, respectively, with a relative standard deviation (n = 3) of 2.5% and 1.0% at 20 μg L−1. The potential application of this UV-LED Photo-CVG AFS was demonstrated by successfully analyzing a certified reference water sample and several mineral water samples.

Graphical abstract: A miniaturized UV-LED photochemical vapor generator for atomic fluorescence spectrometric determination of trace selenium

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Publication details

The article was received on 21 Feb 2018, accepted on 04 May 2018 and first published on 05 May 2018


Article type: Paper
DOI: 10.1039/C8JA00052B
Citation: J. Anal. At. Spectrom., 2018,33, 1217-1223
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    A miniaturized UV-LED photochemical vapor generator for atomic fluorescence spectrometric determination of trace selenium

    Z. Zou, F. Xu, Y. Tian, X. Jiang and X. Hou, J. Anal. At. Spectrom., 2018, 33, 1217
    DOI: 10.1039/C8JA00052B

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