MUNOZ, Gabriel; VO DUY, Sung; DUY, Sung Vo; BUDZINSKI, Hélène; LABADIE, Pierre; LIU, Jinxia; SAUVÉ, Sébastien

doi:10.1016/j.aca.2015.04.015

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MUNOZ, Gabriel
Environnements et Paléoenvironnements OCéaniques [EPOC]

VO DUY, Sung

DUY, Sung Vo

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Analytica Chimica Acta. 2015-06-01, vol. 881, p. 98-106

Résumé en anglais

An alternative analysis technique for the quantitation of 15 poly- and perfluoroalkyl substances (PFASs) in water matrices is reported. Analysis time between each sample was reduced to less than 20 s, all target molecules being analyzed in a single run with the use of laser diode thermal desorption atmospheric pressure chemical ionization (LDTD/APCI) coupled with high resolution accurate mass (HRMS) orbitrap mass spectrometry. LDTD optimal settings were investigated using either one-factor-at-a-time or experimental design methodologies, while orbitrap parameters were optimized simultaneously by means of a Box-Behnken design. Following selection of an adequate sample concentration and purification procedure based on solid-phase extraction and graphite clean-up, the method was validated in an influent wastewater matrix. Environmentally significant limits of detection were reported (0.3-4 ng L-1 in wastewater and 0.03-0.2 ng L-1 in surface water) and out of the 15 target analytes, 11 showed excellent accuracies (±20% of the target values) and recovery rates (75-125%). The method was successfully applied to a selection of environmental samples, including wastewater samples in 7 locations across Canada, as well as surface and tap water samples from the Montreal region, providing insights into the degree of PFAS contamination in this area.< Réduire

Mots clés en anglais

Perfluorinated; Wastewater

Laser diode thermal desorption

High resolution accurate mass

Orbitrap

Experimental design

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Quantitative analysis of poly- and perfluoroalkyl compounds in water matrices using high resolution mass spectrometry: Optimization for a laser diode thermal desorption method

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