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Orientador(es)
Resumo(s)
A new paired ion electrospray ionization tandem mass spectrometry method for determination ofanionic surfactants in water samples was developed. In this method, dicationic ion-pairing reagents were complexed with monoanionic analytes to facilitate analyte detection in positive mode electrospray ionization – mass spectrometry. Single ion monitoring and selected reaction monitoring on a triple quadrupole instrument were performed and compared. Four dicationic reagents were tested for the determination of perfluorooctanoic acid (PFOA), perfluorooctane sulfonate (PFOS),sodium dodecylsul-fate (SDS), dodecylbenzene sulfonic acid (DBS), and stearic acid (SA), among other common anions. The obtained limits of detection were compared with those from previous literature. Solid phase extraction using a C18 cartridge was performed in order to eliminate matrix interferences. A literature review was compiled for the methods published between 2010 and 2015 for determination of anionic surfactants.
The otimized method was more sensitive than previously developed methods with LOD values of 2.35, 35.4, 37.0, 1.68, and 0.675 pg for SDS, SA, DBS, PFOS, and PFOA, respectively. The developed method was effectively applied for the determination of anionic surfactants in different water samples such as bottled drinking water, cooking water, tap water, and wastewater.
Descrição
Palavras-chave
Anionic surfactants Water analysis Tandem mass spectrometry Solid phase extraction Perfluorinated compounds Ion pairing PIESI
Contexto Educativo
Citação
SANTOS, Inês C.; GUO, Hongyue; MESQUITA, Raquel B.R.; RANGEL, Antonio O.S.S.; ARMSTRONg, D. W.; SCHUG, K. A. - Paired-ion electrospray ionization – triple quadrupole tandem mass spectrometry for quantification of anionic surfactants in waters. Talanta. ISSN: 0039-9140 (2015), 143, 320–327
Editora
Elsevier