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Cobalt ion-enhanced photochemical vapor generation of tellurium (IV) in mixed acid medium for its sensitive detection by atomic fluorescence spectrometry

Abstract

A method of cobalt ion assisted enhancement of photochemical vapor generation-atomic fluorescence spectrometry (PVG-AFS) was proposed for sensitive determination of ultratrace tellurium (IV). With a mixure of 5% (v/v) formic acid and 20% (v/v) acetic acid as the reaction medium, more than 13-fold improvement in AFS intensity for Te(IV) was achieved simply by adding 1 mg L-1 Co2+ as a homogenous catalyst. Its possible reaction mechanism was proposed with the characterized results of GC-MS and electron paramagnetic resonance (EPR). Under optimal conditions, a limit of detection (LOD) for Te(IV) was 0.06 g L-1, with relative standard deviation (RSD) of 1.3% (10 µg L−1 Te, 7 times). The accuracy and utility of this methodology were validated by analysis of real water samples, with satisfactory recoveries of 91-108%.

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Supplementary files

Article information


Submitted
26 Feb 2020
Accepted
14 May 2020
First published
15 May 2020

J. Anal. At. Spectrom., 2020, Accepted Manuscript
Article type
Paper

Cobalt ion-enhanced photochemical vapor generation of tellurium (IV) in mixed acid medium for its sensitive detection by atomic fluorescence spectrometry

W. Zeng, J. Hu, H. Chen, Z. Zou, X. Hou and X. Jiang, J. Anal. At. Spectrom., 2020, Accepted Manuscript , DOI: 10.1039/D0JA00076K

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