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Design and development of an automated flow injection instrument for the determination of arsenic species in natural waters

Rev. Sci. Instrum. 80, 104101 (2009); doi:10.1063/1.3202083

Published 13 October 2009

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Grady Hanrahan,1 Tina K. Fan,2 Melanie Kantor,3 Keith Clark,4 Steven Cardenas,4 Darrell W. Guillaume,5 and Crist S. Khachikian6
1Department of Chemistry, California Lutheran University, 60 West Olsen Road, Thousand Oaks, California 91360-2787, USA
2Department of Civil and Environmental Engineering, University of California, Berkeley, 760 Davis Hall, Berkeley, California 94720-1710, USA
3School of Humanities and Sciences, Stanford University, 450 Serra Mall, Stanford, California 94305, USA
4Department of Chemistry and Biochemistry, California State University, Los Angeles, 5151 State University Drive, Los Angeles, California 90032, USA
5Department of Mechanical Engineering, California State University, Los Angeles, 5151 State University Drive, Los Angeles, California 90032, USA
6Department of Civil Engineering, California State University, Los Angeles, 5151 State University Drive, Los Angeles, California 90032, USA
The design and development of an automated flow injection instrument for the determination of arsenite [As(III)] and arsenate [As(V)] in natural waters is described. The instrument incorporates solenoid activated self-priming micropumps and electronic switching valves for controlling the fluidics of the system and a miniature charge-coupled device spectrometer operating in a graphical programming environment. The limits of detection were found to be 0.79 and 0.98  µM for As(III) and As(V), respectively, with linear range of 1–50  µM. Spiked ultrapure water samples were analyzed and recoveries were found to be 97%–101% for As(III) and 95%–99% for As(V), respectively. Future directions in terms of automation, optimization, and field deployment are discussed. ©2009 American Institute of Physics
History: Received 15 September 2008; accepted 17 July 2009; published 13 October 2009
Permalink: http://link.aip.org/link/?RSINAK/80/104101/1
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KEYWORDS and PACS

Keywords
PACS
  • 93.85.-q
    Instruments and techniques for geophysical research: Exploration geophysics
  • 92.40.Qk
    Surface water, water resources
  • 92.40.Bc
    Chemistry of fresh water
  • 89.60.-k
    Environmental studies
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
0034-6748 (print)   1089-7623 (online)
Publisher:
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