Determination of arsenic and selenium by hydride generation and headspace solid phase microextraction coupled with optical emission spectrometry

Anna Tyburska , Krzysztof Jankowski , Agnieszka Rodzik

Abstract

A hydride generation headspace solid phase microextraction technique has been developed in combination with optical emission spectrometry for determination of total arsenic and selenium. Hydrides were generated in a 10 mL volume septum-sealed vial and subsequently collected onto a polydimethylsiloxane/Carboxen solid phase microextraction fiber from the headspace of sample solution. After completion of the sorption, the fiber was transferred into a thermal desorption unit and the analytes were vaporized and directly introduced into argon inductively coupled plasma or helium microwave induced plasma radiation source. Experimental conditions of hydride formation reaction as well as sorption and desorption of analytes have been optimized showing the significant effect of the type of the solid phase microextraction fiber coating, the sorption time and hydrochloric acid concentration of the sample solution on analytical characteristics of the method developed. The limits of detection of arsenic and selenium were 0.1 and 0.8 ng mL− 1, respectively. The limit of detection of selenium could be improved further using biosorption with baker's yeast Saccharomyces cerevisiae for analyte preconcentration. The technique was applied for the determination of total As and Se in real samples.
Author Anna Tyburska
Anna Tyburska,,
-
, Krzysztof Jankowski (FC / CAC)
Krzysztof Jankowski,,
- Chair Of Analytical Chemistry
, Agnieszka Rodzik
Agnieszka Rodzik,,
-
Journal seriesSpectrochimica Acta Part B-Atomic Spectroscopy, ISSN 0584-8547, (A 35 pkt)
Issue year2011
Vol66
No7
Pages517-521
Keywords in EnglishArsenic, Hydride generation, Optical emission spectrometry, Selenium, Solid phase extraction
ASJC Classification1607 Spectroscopy; 3105 Instrumentation; 3107 Atomic and Molecular Physics, and Optics; 1602 Analytical Chemistry
DOIDOI:10.1016/j.sab.2011.03.010
URL http://www.sciencedirect.com/science/article/pii/S0584854711000619
Score (nominal)35
Publication indicators WoS Citations = 23; Scopus SNIP (Source Normalised Impact per Paper): 2011 = 1.434; WoS Impact Factor: 2011 = 2.876 (2) - 2011=2.74 (5)
Citation count*16 (2015-03-26)
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