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A surface sampling and liquid chromatography mass spectrometry method for the analysis of quaternary ammonium compounds collected from public transportation buses in New Jersey

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Emerging Contaminants 2022年第1期8卷 318-328页

作者： abigail lazofsky Cathleen Doherty Patrick Szary Brian Buckley Environmental and Occupational Health Sciences Institute Rutgers University170 Frelinghuysen RoadPiscatawayNJ08854USA Center for Advanced Infrastructure and Transportation Rutgers University100 Brett RoadPiscatawayNJ08854USA

Quaternary ammonium compounds(QACs)are a class of antimicrobial disinfectants whose use in cleaning products increased during the COVID-19 ***,their low vapor pressure indicates a proclivity to persist on surfaces,and their presence suggests a level of protection against *** widespread application of QACs in response to the SARS CoV-2 virus created a need to evaluate their longevity on surfaces,for both efficacy and possible health *** are however,no standardized analytical methods for QAC surface sampling and analysis,and no published studies quantifying their concentrations on mass transportation vehicles-a high occupancy,close-contact microenvironment documented to facilitate the spread the SARS CoV-2 ***,we describe a robust liquid chromatography mass spectrometry(LC-MS)method for the analysis of QACs and simultaneous development of a direct surface sampling and extraction *** demonstrate the applicability of the method through the analysis of surface samples collected from in-service public transportation *** rapid,sensitive LC-MS method included 8 target QACs quantified on a Q-Exactive HF Hybrid Quadrupole-Orbitrap mass spectrometer using an electrospray ionization source and Dionex UltiMate 3000 UHPLC system for analyte *** standard mixtures at concentrations between 0.1 ng mL^(-1)and 2000 ng mL^(-1)were analyzed,and chromatographic separation of all analytes was achieved in less than 10 *** correlation coefficients were reported at r>0.986,and LODs ranged from 0.007 to 2.103 ng mL^(-1)for all compounds,confirming the method's sensitivity.A previously reported surface sampling and extraction protocol was modified to further simplify the procedure and expand the number of target *** new sampling protocol was optimized from 10 commercially available wipes and 4 solvent types by quantifying recovery from the ***-Aid brand small gauze pads saturated with isopropanol had

关键词： Alkyl dimethyl benzyl ammonium chloride Alkyl(ethyl benzyl)dimethyl ammonium chloride Surface sampling Orbitrap mass spectrometry Public transportation COVID-19

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