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

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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 mixture 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 homogeneous catalyst. A possible reaction mechanism was proposed with the characterization results of GC-MS and electron paramagnetic resonance (EPR). Under optimal conditions, the limit of detection (LOD) for Te(IV) was 0.06 μg L−1, with a 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%.

Graphical abstract: Cobalt ion-enhanced photochemical vapor generation in a mixed acid medium for sensitive detection of tellurium(iv) by atomic fluorescence spectrometry

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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, Advance Article
Article type
Paper

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

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

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