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Automated Electric-Field-Driven Membrane Extraction System Coupled to Liquid Chromatography-Mass Spectrometry
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 2827210
Author(s) See, Hong Heng; Hauser, Peter C
Author(s) at UniBasel Hauser, Peter C.
Year 2014
Title Automated Electric-Field-Driven Membrane Extraction System Coupled to Liquid Chromatography-Mass Spectrometry
Journal Analytical chemistry
Volume 86
Number 17
Pages / Article-Number 8665-70
Abstract An automated analyte electroextraction and preconcentration system, which was used as the front end for a liquid chromatography-electrospray mass spectrometry instrument, is described. The extraction was based on driving the anionic analytes across a polymer inclusion membrane by application of a potential of 200 V to the cell. Five milliliters (5 mL) of sample were passed through a flow-through cell at a flow rate of 0.2 mL/min containing a membrane 20 mu m thick. This consisted of 75% cellulose triacetate as base polymer, 12.5% of tris(2-ethylhexyl)phosphate as plasticizer, and 12.5% of Aliquat 336 as cationic carrier. The target analytes were enriched in 20 mu L of a stagnant acceptor solution prior to online LC/MS analysis. The performance of the system was demonstrated for the determination of chlorinated phenoxyacetic acid herbicides in spiked river water. Enrichment factors of similar to 200 were achieved with recoveries of typically 99% and precision values of typically 5%. The limit of detection (LOD) values were found to be between 0.03 ng/mL to 0.08 ng/mL.
Publisher American Chemical Society
ISSN/ISBN 0003-2700
edoc-URL http://edoc.unibas.ch/dok/A6337831
Full Text on edoc No
Digital Object Identifier DOI 10.1021/ac5015589
PubMed ID http://www.ncbi.nlm.nih.gov/pubmed/25111065
ISI-Number WOS:000341229200024
Document type (ISI) Journal Article
 
   

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23/04/2024