
Keywords: ETS; environmental tobacco smoke; LOQ; limit of quantitation; PFASs; perfluoroalkyl Substances; PFDeA; perfluorodecanoic acid; PFDoDA; perfluorododecanoic acid; PFOA; perfluorooctanoic acid; PFOS; perfluorooctyl sulfonate; PFUnDA; perfluoroundecanoic acid