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

• DOI: 10.1063/1.3202083
• Publication Date: 2009-10-13T22:57:10Z
• Authors: Grady Hanrahan; Tina K. Fan; Melanie Kantor; Keith Clark; Steven Cardenas; Darrell W. Guillaume; Crist S. Khachikian
• Keywords: Ultrapure water; Solenoid; Fluidics; Solenoid valve

The design and development of an automated flow injection instrument for the determination arsenite [As(III)] arsenate [As(V)] in natural waters is described. incorporates solenoid activated self-priming micropumps electronic switching valves controlling fluidics system a miniature charge-coupled device spectrometer operating graphical programming environment. limits detection were found to be 0.79 0.98 μM As(III) As(V), respectively, with linear range 1–50 μM. Spiked ultrapure water samples analyzed recoveries 97%–101% 95%–99% respectively. Future directions terms automation, optimization, field deployment are discussed.