Determination of Inorganic Selenium Species in Marine Waters by Hydride Generation–AFS

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Contents Vol 57(10)

doi:10.1071/CH04072

Determination of Inorganic Selenium Species in Marine Waters by Hydride Generation–AFS

Bronwyn D. Wake ^A ^B ^C, Edward C. V. Butler ^B ^D ^F, Alison M. Featherstone ^C, Patti Virtue ^A, Bernard Averty ^E, Pierre Michel ^E

^A IASOS, University of Tasmania, Private Bag 77, Hobart TAS 7000, Australia.
^B CSIRO Division of Marine Research, GPO Box 1538, Hobart TAS 7000, Australia.
^C School of Chemistry, University of Tasmania, Private Bag 75, Hobart TAS 7000, Australia.
^D ACE-CRC, University of Tasmania, Private Bag 80, Hobart TAS 7000, Australia.
^E IFREMER, B.P. 1105, 44311 Nantes Cedex 03, France.
^F Author to whom correspondence should be addressed (e-mail: edward.butler@csiro.au).





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Australian Journal of Chemistry 57(10) 937–943 http://dx.doi.org/10.1071/CH04072
Submitted: 15 March 2004 Accepted: 30 June 2004 Published online: 1 October 2004

Abstract

A method based on hydride generation with cryogenic trapping and atomic fluorescence detection was developed that is capable of determining both inorganic Se species (Se^IV and Se^VI) while at sea. Evaluation of the system for optimal performance was made for each stage of the analysis and detection sequence, as well as for the Se^VI reduction step. A detection limit of 0.4 ng L^-1 Se in a 10 mL sample was achieved using this method. Precision was better than 3.5% for 25, 100, and 1000 ng L^-1 Se^IV standard solutions. Accuracy was determined by recovery studies using natural samples and a certified reference seawater (NASS-5).