Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1016/j.talanta.2014.01.024
Titel (primär) Evaluation of polyethersulfone performance for the microextraction of polar chlorinated herbicides from environmental water samples
Autor Prieto, A.; Rodil, R.; Quintana, J.B.; Cela, R.; Möder, M.; Rodríguez, I.
Quelle Talanta
Erscheinungsjahr 2014
Department ANA
Band/Volume 122
Seite von 264
Seite bis 271
Sprache englisch
Keywords Polyethersulfone; Sorptive extraction; Polar acidic herbicides; Water samples; Gas chromatography–mass spectrometry
UFZ Querschnittsthemen RU2;
Abstract In this work, the suitability of bulk polyethersulfone (PES) for sorptive microextraction of eight polar, chlorinated phenoxy acids and dicamba from environmental water samples is assessed and the analytical features of the optimized method are compared to those reported for other microextraction techniques. Under optimized conditions, extractions were performed with samples (18 mL) adjusted at pH 2 and containing a 30% (w/v) of sodium chloride, using a tubular PES sorbent (1 cm length×0.7 mm o.d., sorbent volume 8 µL). Equilibrium conditions were achieved after 3 h of direct sampling, with absolute extraction efficiencies ranging from 39 to 66%, depending on the compound. Analytes were recovered soaking the polymer with 0.1 mL of ethyl acetate, derivatized and determined by gas chromatography–mass spectrometry (GC–MS). Achieved quantification limits (LOQs) varied between 0.005 and 0.073 ng mL−1. After normalization with the internal surrogate (IS), the efficiency of the extraction was only moderately affected by the particular characteristics of different water samples (surface and sewage water); thus, pseudo-external calibration, using spiked ultrapure water solutions, can be used as quantification technique. The reduced cost of the PES polymer allowed considering it as a disposable sorbent, avoiding variations in the performance of the extraction due to cross-contamination problems and/or surface modification with usage.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=14886
Prieto, A., Rodil, R., Quintana, J.B., Cela, R., Möder, M., Rodríguez, I. (2014):
Evaluation of polyethersulfone performance for the microextraction of polar chlorinated herbicides from environmental water samples
Talanta 122 , 264 - 271 10.1016/j.talanta.2014.01.024