University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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Classification: Marine -> phytoplankton

Citations 1

"Flow Injection System With Flame Photometric Detection For The Measurement Of The Dimethylsulfide Precursor β-dimethylsulfoniopropionate"
Anal. Chim. Acta 1998 Volume 377, Issue 1 Pages 95-101
A. G. Howard*, C. E. Freeman, D. W. Russell, M. H. Arbab-Zavar and P. Chamberlain

Abstract: A flow injection analysis system was developed for the routine measurement of β-dimethylsulfoniopropionate (DMSP), an algal osmoregulator and cryoprotectant which plays a crucial role in the cycling of sulfur in the environment. The anal. system combines an inline base hydrolysis step with transport of generated dimethylsulfide to the gas phase where it is measured by sulfur-specific flame photometric detection. This combination of chem., phys. and spectroscopic steps results in a system which is highly selective to DMSP. The system was evaluated for its ability to distinguish DMSP from other dimethylsulfonium compounds S-Me methionine was not detected by the system. Only with very closely related compounds, such as the 2-Me derivative of DMSP, were false responses generated. With a detection limit (twice background) of 1 x 10^-7 mol L-1 and a working range 1 x 10^-3-1 x 10^-6 mol L-1, the system is ideally suited to the routine measurement of DMSP in marine macroalgae and phytoplankton.
β-Dimethylsulfoniopropionate Spectrophotometry Optimization Interferences