Document Detail

Quantification of oxygenated volatile organic compounds in seawater by membrane inlet-proton transfer reaction/mass spectrometry.
MedLine Citation:
PMID:  21995919     Owner:  NLM     Status:  In-Data-Review    
The role of the ocean in the cycling of oxygenated volatile organic compounds (OVOCs) remains largely unanswered due to a paucity of datasets. We describe the method development of a membrane inlet-proton transfer reaction/mass spectrometer (MI-PTR/MS) as an efficient method of analysing methanol, acetaldehyde and acetone in seawater. Validation of the technique with water standards shows that the optimised responses are linear and reproducible. Limits of detection are 27nM for methanol, 0.7nM for acetaldehyde and 0.3nM for acetone. Acetone and acetaldehyde concentrations generated by MI-PTR/MS are compared to a second, independent method based on purge and trap-gas chromatography/flame ionisation detection (P&T-GC/FID) and show excellent agreement. Chromatographic separation of isomeric species acetone and propanal permits correction to mass 59 signal generated by the PTR/MS and overcomes a known uncertainty in reporting acetone concentrations via mass spectrometry. A third bioassay technique using radiolabelled acetone further supported the result generated by this method. We present the development and optimisation of the MI-PTR/MS technique as a reliable and convenient tool for analysing seawater samples for these trace gases. We compare this method with other analytical techniques and discuss its potential use in improving the current understanding of the cycling of oceanic OVOCs.
Rachael Beale; Peter S Liss; Joanna L Dixon; Philip D Nightingale
Related Documents :
11217029 - Extraction of thiodiglycol from soil using pressurised liquid extraction.
16884729 - Multiple response optimisation based on desirability functions of a microwave-assisted ...
22667629 - Stencil mask methodology for the parallelized production of microscale mechanical test ...
2379239 - Real-time visualization of cell cycle-dependent changes in microtubule dynamics in cyto...
8953489 - Supercritical fluid extraction method development for extraction of an experimental hiv...
22216439 - Preliminary studies of a novel multifunctional wide-bore electrophoresis system.
17890569 - Classification of commercial catuaba samples by nmr, hplc and chemometrics.
22717559 - Determination of phenylethanolamine a in animal hair, tissues and feeds by reversed pha...
11261419 - Determination of capsaicin and dihydrocapsaicin in air in a pickle and pepper processin...
Publication Detail:
Type:  Journal Article     Date:  2011-08-22
Journal Detail:
Title:  Analytica chimica acta     Volume:  706     ISSN:  1873-4324     ISO Abbreviation:  Anal. Chim. Acta     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-10-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370534     Medline TA:  Anal Chim Acta     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  128-34     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier B.V. All rights reserved.
Plymouth Marine Laboratory, Prospect Place, Plymouth, Devon PL1 3DH, UK.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Development of an impedimetric immunosensor for the determination of 3-amino-2-oxazolidone residue i...
Next Document:  Development and application of a polar coating for stir bar sorptive extraction of emerging pollutan...