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Determination of antimony in water samples by hydride generation coupled with atmospheric pressure glow discharge atomic emission spectrometry

Abstract

A low power (~10 W), miniaturized atmospheric pressure glow discharge (APGD) source sustained between a tungsten cathode and a titanium tube anode was coupled with hydride generation (HG) for sensitive determination of antimony in water samples with atomic emission spectrometry (AES). Sb ions were converted into volatile hydride through the reaction with KBH4 firstly and then it was introduced into APGD source for excitation and detected by a compact CCD (charge-coupled device) microspectrometer. A univariate approach and the simplex optimization procedure were used to achieve optimized conditions and derive analytical figures of merit. Under optimal conditions, the detection limit (DL) for Sb was 0.14 μg L−1. Moreover, the HG-APGD-AES system demonstrated excellent repeatability (about 1.5% peak height relative standard deviation). The calibration curve was linear in the range between 1-100 μg L−1, with a correlation coefficient of R2=0.9996. The proposed method was successfully applied to the determination of certified reference material (GSB 07-1376-2001) and some groundwater samples. Recoveries of Sb added to these water samples were within 90.9-100.7%, proving good accuracy of the HG-APGD-AES method.

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Publication details

The article was received on 16 Aug 2018, accepted on 28 Nov 2018 and first published on 01 Dec 2018


Article type: Paper
DOI: 10.1039/C8JA00271A
Citation: J. Anal. At. Spectrom., 2018, Accepted Manuscript
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    Determination of antimony in water samples by hydride generation coupled with atmospheric pressure glow discharge atomic emission spectrometry

    Z. Zhu, C. Yang, P. yu, H. Zheng, Z. Liu, Z. Xing and S. H. Hu, J. Anal. At. Spectrom., 2018, Accepted Manuscript , DOI: 10.1039/C8JA00271A

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