Determination of arsenate by sorption pre-concentration on polystyrene beads packed in a microfluidic device with chemiluminescence detection

The Analyst
Waraporn Som-AumJin-Ming Lin

Abstract

A highly sensitive chemiluminescence (CL) method for the determination of arsenate in water based on a simple microfluidic device was developed. The method was based on sorption pre-concentration of arsenate as a form of vanadomolybdoarsenate heteropoly acid (VMoAs-HPA) ion-paired with hexadecyltrimethylammonium bromide on the surface of polystyrene beads packed in a microfluidic device monitored by chemiluminescence detection. The composition of the VMoAs-HPA complex was studied by varying the concentrations of ammonium molybdate, ammonium vanadate and sulfuric acid with a variable-size simplex optimization process, of which the optimum concentrations were 6.3 x 10(-5), 5.0 x 10(-6) and 1.0 x 10(-2) M, respectively. In this work, 1.0 x 10(-3) M ethylenediaminetetraacetic acid was added to all work solutions to remove the interferences of the other metal ions on the CL detection. The integration of sorption pre-concentration not only increased the detection sensitivity but also eliminated the interference from phosphate and chromate. The calibration plot was linear from 1.0 x 10(-7) to 5.0 x 10(-5) M As(v). The limit of detection was 8.9 x 10(-8) M As(v) (S/N = 3). The time required for one analysis run was as short as 5 min. T...Continue Reading

References

Feb 24, 2001·Environmental Pollution·J A HingstonJ N Lester
Jul 18, 2006·Analytical Chemistry·Serge CosnierShaojun Dong
Sep 15, 2006·Analytical Chemistry·Tribidasari A IvandiniYasuaki Einaga
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Citations

Oct 31, 2008·Analytical and Bioanalytical Chemistry·Hai-Fang Li, Jin-Ming Lin
Sep 4, 2012·Luminescence : the Journal of Biological and Chemical Luminescence·Haider A J Al Lawati
Aug 6, 2010·Analytica Chimica Acta·Meilin LiuJin-Ming Lin
Oct 19, 2011·The Analyst·Jana C JokerstCharles S Henry
Nov 7, 2019·Sensors·Swapna A Jaywant, Khalid Mahmood Arif
Jan 1, 2016·Environmental Chemistry Letters·Imran AliMohd Marsin Sanagi
May 14, 2021·Biomicrofluidics·Hoi Kei ChiuTuomas P J Knowles

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