Ferric ion induced enhancement of ultraviolet vapour generation coupled with atomic fluorescence spectrometry for the determination of ultratrace inorganic arsenic in surface water

The Analyst
Yuelong WangDeyuan Qin

Abstract

A novel method of ultraviolet vapour generation (UVG) coupled with atomic fluorescence spectrometry (AFS) was developed for the determination of ultratrace inorganic arsenic (iAs) in surface water. In this work, different ferric species were utilised for the first time as an enhancement reagent for the ultraviolet vapour generation of As(iii), and their UVG efficiencies for volatile species of arsenic were investigated. 15 mg L(-1) of ferric chloride provided the greatest enhancement of approximately 10-fold, using 20% acetic acid combined with 4% formic acid with 30 s ultraviolet irradiation at 200 mL min(-1) Ar/H2 flow rate. Under the optimised conditions, the linear range was 1.0 μg L(-1)-100.0 μg L(-1), and the spiked recoveries were 92%-98%. The limit of detection was 0.05 μg L(-1) for iAs, and the relative standard deviation (RSD) value of the repeated measurements was 2.0% (n = 11). This method was successfully applied to the determination of ultratrace iAs in tap water, river water, and lake water samples using 0.2% H2SO4 (v : v) as the sample preserver. The obtained values for the water samples of certified reference materials (CRMs) including GSB-Z50004-200431, GBW08605 and GBW(E)080390 were all within the certified r...Continue Reading

References

Apr 15, 2004·Analytical Chemistry·Xuming GuoGraeme J Gardner
Oct 30, 2004·American Journal of Public Health·Kristina M ZieroldHenry Anderson
Mar 17, 2010·Analytical Chemistry·Chengbin ZhengXiandeng Hou

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Citations

Feb 11, 2021·Analytical Chemistry·Ying YuYing Gao
Nov 2, 2020·International Journal of Biological Macromolecules·Aditya SubhedarHanieh Kargarzadeh
Sep 8, 2018·Analytical Chemistry·Jakub ŠoukalStanislav Musil

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