Publications by authors named "Craig Vigo"
Article Synopsis
- - The study focused on measuring 17 per- and polyfluoroalkyl substances (PFAS) in source and treated water from 25 drinking water treatment plants (DWTPs) across the U.S. to assess contaminants of emerging concern (CECs).
- - PFAS were found in all 50 water samples, with a broad range of concentrations; the median total PFAS concentration was slightly lower in treated water (19.5 ng/L) compared to source water (21.4 ng/L).
- - One DWTP exceeded the U.S. EPA’s health advisory level for PFOA and PFOS, and specific PFAS profiles were identified in plants along two major rivers, showing different dominant PFAS compounds
A trace analytical method was developed for the determination of seventeen specific perfluorinated chemicals (PFCs) in environmental and drinking waters. The objectives were to optimize an isotope-dilution method to increase the precision and accuracy of the analysis of the PFCs and to eliminate the need for matrix-matched standards. A 250 mL sample of environmental or drinking water was buffered to a pH of 4, spiked with labeled surrogate standards, extracted through solid phase extraction cartridges, and eluted with ammonium hydroxide in methyl tert-butyl ether: methanol solution.
View Article and Find Full Text PDFStudies show that perfluorinated compounds cause various toxicological effects; nevertheless, effects on immune function and developmental endpoints have not been addressed at length. This study examined the effects of perfluorooctane sulfonate (PFOS) in white leghorn hatchlings on various developmental, immunological, and clinical health parameters. In addition, serum PFOS concentrations were determined by LC/MS/MS.
View Article and Find Full Text PDFTen organophosphate (OP) pesticides: phorate, disulfoton, terbufos, methidathion, bensulide, chlorethoxyfos, phosmet, methyl parathion, phostebupirim, and temephos were evaluated for their potential to undergo oxidation to their respective oxons and/or other oxidation analogues in laboratory water. Samples were collected at time intervals up to 72h of chlorination and analyzed by both gas chromatography-mass selective detection (GC-MSD) and liquid chromatography-tandem mass spectrometry (LC-MS/MS). The results show that methidathion and methyl parathion were stable in unchlorinated water, while all other OP pesticides were not stable over the 72h exposure period.
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