title: Direct quantification of dimethylsulfoniopropionate (DMSP) in marine micro- and macroalgae using HPLC or UPLC/MS.
abstract: A simple method for the direct quantification of dimethylsulfinopropionate (DMSP) using HPLC or UPLC coupled to UV and/or MS detection is introduced. The protocol is applied for the determination of DMSP from marine micro- and macroalgae. The method is based on the derivatisation of DMSP using 1-pyrenyldiazomethane followed by reversed phase HPLC or UPLC separation. The detection limit is 590 nM, corresponding to 1 ng DMSP per injection. Using a combination of UV and MS detection the calibration curves were linear in the range of 2.93 microM to 11.7 mM concentrations. We show that direct determination of DMSP is possible from macroalgal tissue and microalgal cultures if DMSP-lyase activity is suppressed during work-up.
authors.affiliation: Laboratory of Chemical Ecology/Institute of Chemical Sciences and Engineering/Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
authors.forename: Theresa
authors.initials: T
authors.lastname: Wiesemeier
authors.forename: Georg
authors.initials: G
authors.lastname: Pohnert
mesh_terms: D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D056890:Eukaryota / Q000737:chemistry*; D008386:Marine Biology; D013058:Mass Spectrometry / Q000379:methods*; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*; D013452:Sulfonium Compounds / Q000032:analysis*
chemical_list: D013452:Sulfonium Compounds; C068078:dimethylpropiothetin