selected scholarly activity
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chapters
- The Importance of NMR as a Discovery Tool. 10-56. 2024
- Chapter 14 Nontargeted Analysis of Persistent Organic Pollutants by Mass Spectrometry and GC×GC. Comprehensive Analytical Chemistry. 405-431. 2016
- Analytical Methodology of POPs. 59-139. 2014
- Chapter 3 Analytical Methodology of POPs. 59-139. 2014
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conferences
- Comprehensive targeted and non-targeted analysis of indoor dust using LC-HRMS with ion mobility. ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY. 2018
- Speciation of organics in aged atmospheric particles from a biomass burning event: Relationship to light absorption and comparison to humic acids. ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY. 2015
- STRATEGIES AND TECHNIQUES FOR IDENTIFYING UNKNOWN COMPOUNDS IN ENVIRONMENTAL SAMPLES. ENVIRONMENTAL FORENSICS: PROCEEDINGS OF THE 2013 INEF. 158-170. 2014
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journal articles
- Opinions of parents and parents-to-be on micro- and nanoplastics: knowledge and willingness to implement change in Canada. Microplastics and Nanoplastics. 5:10. 2025
- Metabolomics identified distinct molecular-level responses in Daphnia magna after exposure to phenanthrene and its oxygen and nitrogen containing analogs.. Chemosphere. 377:144334. 2025
- Do co-solvents used in exposure studies equally perturb the metabolic profile of Daphnia magna?. Environmental Toxicology and Chemistry. vgaf068. 2025
- Contribution of Coal Tar Sources to Polycyclic Aromatic Compounds and Associated Ecological Risk in Lake Ontario Sediments: Inference from a Novel Marker.. Environmental Science and Technology. 59:3193-3204. 2025
- Comprehensive characterization of European house dust contaminants: Concentrations and profiles, geographical variability, and implications for chemical regulation and health risk.. Science of the Total Environment. 957:177639. 2024
- Characterization and Quantitation of Microplastics in the Placental Blood of Canadian Mothers by Pyrolysis Gas Chromatography-Ion mobility mass spectrometry. Placenta. 154:e51. 2024
- Quantitative evidence of micro-/nanoplastics in placental tissue of healthy Canadians revealed through pyrolysis gas chromatography-cyclic ion mobility mass spectrometry. Placenta. 154:e52. 2024
- Development of a Simple Cost Effective Oxygenation System for In Vivo Solution State NMR in 10 mm NMR Tubes. Analytical Chemistry. 96:12667-12675. 2024
- Why are nH-perfluoroalkanoate ions more mobile than expected? Implications for identifying an emerging environmental pollutant. Chemical Communications. 60:7894-7897. 2024
- Emerging contaminants: A One Health perspective. The Innovation. 5:100612-100612. 2024
- Metabolomic‐Based Comparison of Daphnia magna and Japanese Medaka Responses After Exposure to Acetaminophen, Diclofenac, and Ibuprofen. Environmental Toxicology and Chemistry. 43:1339-1351. 2024
- Differential impact of perfluorooctanoic acid and fluorotelomer ethoxylates on placental metabolism in mice. Chemosphere. 356:141923-141923. 2024
- Toward Part-per-Million Precision in the Determination of an Ion’s Collision Cross Section Using Multipass Cyclic Ion Mobility. Journal of the American Society for Mass Spectrometry. 35:775-783. 2024
- Fluorotelomer ethoxylates cause developmental toxicity in mice. Environmental Science: Advances. 3:603-610. 2024
- Size-Resolved Identification and Quantification of Micro/Nanoplastics in Indoor Air Using Pyrolysis Gas Chromatography–Ion Mobility Mass Spectrometry. Journal of the American Society for Mass Spectrometry. 35:275-284. 2024
- Emerging perfluoroalkyl substances in environmental waters revealed by non-targeted screening. Current Opinion in Environmental Science and Health. 37:100531-100531. 2024
- Polystyrene micro- and nanoplastics cause placental dysfunction in mice. Biology of Reproduction. 110:211-218. 2024
- Maternal exposure to polyethylene micro- and nanoplastics impairs umbilical blood flow but not fetal growth in pregnant mice. Scientific Reports. 14:399. 2024
- Bioaccumulative chemicals are either too hard or too soft: Conceptual density functional theory as a screening tool for emerging pollutants. Environment International. 183:108388-108388. 2024
- Metabolomics revealed disruptions in amino acid and antioxidant biochemistry in Daphnia magna exposed to industrial effluents associated with plastic and polymer production. Environmental Research. 241:117547-117547. 2024
- Maternal exposure to polystyrene nanoplastics alters fetal brain metabolism in mice. Metabolomics. 19:96. 2023
- Environmental metabolomics uncovers oxidative stress, amino acid dysregulation, and energy impairment in Daphnia magna with exposure to industrial effluents. Environmental Research. 234:116512-116512. 2023
- Sex differences in the impact of environmental pollutants on placental function. Placenta. 140:e30-e30. 2023
- The impact of maternal exposure to micro-/nanoplastics on placental development, function and metabolism. Placenta. 140:e37-e37. 2023
- Exploring Proton-Only NMR Experiments and Filters for Daphnia In Vivo: Potential and Limitations. Molecules. 28:4863-4863. 2023
- Differentiating Toxic and Nontoxic Tricresyl Phosphate Isomers Using Ion–Molecule Reactions with Oxygen. Journal of the American Society for Mass Spectrometry. 34:640-648. 2023
- Maternal exposure to polystyrene nanoplastics impacts developmental milestones and brain structure in mouse offspring. Environmental Science: Advances. 2:622-628. 2023
- Daphnia magna sub-lethal exposure to phthalate pollutants elicits disruptions in amino acid and energy metabolism. Aquatic Toxicology. 257:106432-106432. 2023
- Nontargeted screening reveals fluorotelomer ethoxylates in indoor dust and industrial wastewater. Environment International. 171:107634-107634. 2023
- Sublethal Exposure of Per‐ and Polyfluoroalkyl Substances of Varying Chain Length and Polar Functionality Results in Distinct Metabolic Responses in Daphnia magna. Environmental Toxicology and Chemistry. 42:242-256. 2023
- Maternal exposure to polystyrene microplastics alters placental metabolism in mice. Metabolomics. 19:1. 2022
- Comparison of sub-lethal metabolic perturbations of select legacy and novel perfluorinated alkyl substances (PFAS) in Daphnia magna. Environmental Research. 212:113582-113582. 2022
- Unwrapping Wrap-around in Gas (or Liquid) Chromatographic Cyclic Ion Mobility–Mass Spectrometry. Analytical Chemistry. 94:11113-11117. 2022
- Gas Chromatography-(Cyclic) Ion Mobility Mass Spectrometry: A Novel Platform for the Discovery of Unknown Per-/Polyfluoroalkyl Substances. Analytical Chemistry. 94:11096-11103. 2022
- Maternal Exposure to Polystyrene Micro- and Nanoplastics Causes Fetal Growth Restriction in Mice. Environmental Science and Technology Letters. 9:426-430. 2022
- The impact of perfluoroalkyl substances on pregnancy, birth outcomes, and offspring development: a review of data from mouse models. Biology of Reproduction. 106:397-407. 2022
- Which of the (Mixed) Halogenated n-Alkanes Are Likely To Be Persistent Organic Pollutants?. Environmental Science and Technology. 55:15912-15920. 2021
- Nontargeted Screening Using Gas Chromatography–Atmospheric Pressure Ionization Mass Spectrometry: Recent Trends and Emerging Potential. Molecules. 26:6911-6911. 2021
- NMR spectroscopy of wastewater: A review, case study, and future potential. Progress in Nuclear Magnetic Resonance Spectroscopy. 126-127:121-180. 2021
- Metabolomics Reveals That Bisphenol Pollutants Impair Protein Synthesis-Related Pathways in Daphnia magna. Metabolites. 11:666-666. 2021
- Predicting the Mass Spectra of Environmental Pollutants Using Computational Chemistry: A Case Study and Critical Evaluation. Journal of the American Society for Mass Spectrometry. 32:1508-1518. 2021
- Wave reflections in the umbilical artery measured by Doppler ultrasound as a novel predictor of placental pathology. EBioMedicine. 67:103326-103326. 2021
- ES&T Works. Environmental Science and Technology. 55:2711-2712. 2021
- Data-Independent Identification of Suspected Organic Pollutants Using Gas Chromatography–Atmospheric Pressure Chemical Ionization–Mass Spectrometry. Analytical Chemistry. 93:1498-1506. 2021
- Infant dietary exposure to dioxin-like polychlorinated biphenyls (dlPCBs), polybrominated and mixed halogenated dibenzo-p-dioxins and furans (PBDD/Fs and PXDD/Fs) in milk samples of lactating mothers in Accra, Ghana. Chemosphere. 263:128156-128156. 2021
- Temporal trends of halogenated and organophosphate contaminants in striped dolphins from the Mediterranean Sea. Science of the Total Environment. 753:142205-142205. 2021
- Rapid Screening of Urinary 1-Hydroxypyrene Glucuronide by Multisegment Injection–Capillary Electrophoresis–Tandem Mass Spectrometry: A High-Throughput Method for Biomonitoring of Recent Smoke Exposures. Analytical Chemistry. 92:13558-13564. 2020
- Halogenated organic contaminants of concern in urban-influenced waters of Lake Ontario, Canada: Passive sampling with targeted and non-targeted screening. Environmental Pollution. 264:114733-114733. 2020
- Toward Comprehensive Per- and Polyfluoroalkyl Substances Annotation Using FluoroMatch Software and Intelligent High-Resolution Tandem Mass Spectrometry Acquisition. Analytical Chemistry. 92:11186-11194. 2020
- Liquid chromatography-ion mobility-high resolution mass spectrometry for analysis of pollutants in indoor dust: Identification and predictive capabilities. Analytica Chimica Acta. 1125:29-40. 2020
- Dried blood spots for the identification of bioaccumulating organic compounds: Current challenges and future perspectives. Current Opinion in Environmental Science and Health. 15:66-73. 2020
- Editorial overview: Exposomics, emerging exposures and analytical challenges. Current Opinion in Environmental Science and Health. 15:A1-A3. 2020
- Rapid fingerprinting of source and environmental microplastics using direct analysis in real time-high resolution mass spectrometry. Analytica Chimica Acta. 1100:107-117. 2020
- Determination of Diphenylamine Antioxidants in Wastewater/Biosolids and Sediment. Environmental Science and Technology Letters. 7:102-110. 2020
- Compositional space: A guide for environmental chemists on the identification of persistent and bioaccumulative organics using mass spectrometry. Environment International. 132:104808-104808. 2019
- C12–30 α-Bromo-Chloro “Alkenes”: Characterization of a Poorly Identified Flame Retardant and Potential Environmental Implications. Environmental Science and Technology. 53:10835-10844. 2019
- Background levels of dioxin-like polychlorinated biphenyls (dlPCBs), polychlorinated, polybrominated and mixed halogenated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs, PBDD/Fs & PXDD/Fs) in sera of pregnant women in Accra, Ghana. Science of the Total Environment. 673:631-642. 2019
- Response to “Letter to the Editor: Optimism for Nontarget Analysis in Environmental Chemistry”. Environmental Science and Technology. 53:5531-5533. 2019
- Fast gas chromatography-atmospheric pressure (photo)ionization mass spectrometry of polybrominated diphenylether flame retardants. Analytica Chimica Acta. 1056:70-78. 2019
- The strength in numbers: comprehensive characterization of house dust using complementary mass spectrometric techniques. Analytical and Bioanalytical Chemistry. 411:1957-1977. 2019
- Characterization of Polycyclic Aromatic Compounds in Commercial Pavement Sealcoat Products for Enhanced Source Apportionment. Environmental Science and Technology. 53:3157-3165. 2019
- Urinary hydroxypyrene determination for biomonitoring of firefighters deployed at the Fort McMurray wildfire: an inter-laboratory method comparison. Analytical and Bioanalytical Chemistry. 411:1397-1407. 2019
- Is Nontargeted Screening Reproducible?. Environmental Science and Technology. 52:11975-11976. 2018
- Evaluation of multiple alternative instrument platforms for targeted and non‐targeted dioxin and furan analysis. Journal of Mass Spectrometry. 53:504-510. 2018
- Improved coverage of naphthenic acid fraction compounds by comprehensive two-dimensional gas chromatography coupled with high resolution mass spectrometry. Journal of Chromatography A. 1536:88-95. 2018
- A high throughput targeted and non-targeted method for the analysis of microcystins and anatoxin-A using on-line solid phase extraction coupled to liquid chromatography–quadrupole time-of-flight high resolution mass spectrometry. Analytical and Bioanalytical Chemistry. 409:4959-4969. 2017
- Identification of Novel Brominated Compounds in Flame Retarded Plastics Containing TBBPA by Combining Isotope Pattern and Mass Defect Cluster Analysis. Environmental Science and Technology. 51:1518-1526. 2017
- Determination of Halogenated Flame Retardants Using Gas Chromatography with Atmospheric Pressure Chemical Ionization (APCI) and a High-Resolution Quadrupole Time-of-Flight Mass Spectrometer (HRqTOFMS). Analytical Chemistry. 88:11406-11411. 2016
- Evidence for High Concentrations and Maternal Transfer of Substituted Diphenylamines in European Eels Analyzed by Two-Dimensional Gas Chromatography–Time-of-Flight Mass Spectrometry and Gas Chromatography–Fourier Transform Ion Cyclotron Resonance Mass Spectrometry. Environmental Science and Technology. 50:12678-12685. 2016
- A review of the determination of persistent organic pollutants for environmental forensics investigations. Analytica Chimica Acta. 941:10-25. 2016
- A comparison of fresh and used aircraft oil for the identification of toxic substances linked to aerotoxic syndrome. Chemosphere. 158:116-123. 2016
- Distinguishing the C3 vs SH4 Mass Split by Comprehensive Two-Dimensional Gas Chromatography–High Resolution Time-of-Flight Mass Spectrometry. Analytical Chemistry. 88:6101-6104. 2016
- A modified QuEChERS approach for the screening of dioxins and furans in sediments. Analytical and Bioanalytical Chemistry. 408:4043-4054. 2016
- Differentiation of (Mixed) Halogenated Dibenzo-p-Dioxins by Negative Ion Atmospheric Pressure Chemical Ionization. Analytical Chemistry. 88:5205-5211. 2016
- Interaction of Metal Cations with Functionalised Hydrocarbons in the Gas Phase: Further Experimental Evidence for Solvation of Metal Ions by the Hydrocarbon Chain. European Journal of Mass Spectrometry. 22:61-70. 2016
- A semi‐quantitative approach for the rapid screening and mass profiling of naphthenic acids directly in contaminated aqueous samples. Journal of Mass Spectrometry. 51:44-52. 2016
- Nontargeted Analysis of Persistent Organic Pollutants by Mass Spectrometry and GC×GC. Comprehensive Analytical Chemistry. 71:405-431. 2016
- Response to the Comment on Comparison of Atmospheric Pressure Ionization Gas Chromatography-Triple Quadrupole Mass Spectrometry to Traditional High-Resolution Mass Spectrometry for the Identification and Quantification of Halogenated Dioxins and Furans. Analytical Chemistry. 87:11166-11166. 2015
- Quantitative Analysis of Mixed Halogen Dioxins and Furans in Fire Debris Utilizing Atmospheric Pressure Ionization Gas Chromatography-Triple Quadrupole Mass Spectrometry. Analytical Chemistry. 87:10368-10377. 2015
- Comparison of Atmospheric Pressure Ionization Gas Chromatography-Triple Quadrupole Mass Spectrometry to Traditional High-Resolution Mass Spectrometry for the Identification and Quantification of Halogenated Dioxins and Furans. Analytical Chemistry. 87:7902-7908. 2015
- Interaction of Metal Cations with Alkylnitriles in the Gas Phase: Solvation of Metal Ions by the Hydrocarbon Chain. European Journal of Mass Spectrometry. 21:579-587. 2015
- Non-targeted analysis of electronics waste by comprehensive two-dimensional gas chromatography combined with high-resolution mass spectrometry: Using accurate mass information and mass defect analysis to explore the data. Journal of Chromatography A. 1395:152-159. 2015
- Complementary Nontargeted and Targeted Mass Spectrometry Techniques to Determine Bioaccumulation of Halogenated Contaminants in Freshwater Species. Environmental Science and Technology. 48:13844-13854. 2014
- Comprehensive characterization of the halogenated dibenzo-p-dioxin and dibenzofuran contents of residential fire debris using comprehensive two-dimensional gas chromatography coupled to time of flight mass spectrometry. Journal of Chromatography A. 1369:138-146. 2014
- Identification and Occurrence of Analogues of Dechlorane 604 in Lake Ontario Sediment and their Accumulation in Fish. Environmental Science and Technology. 48:11170-11177. 2014
- Identification of the Halogenated Compounds Resulting from the 1997 Plastimet Inc. Fire in Hamilton, Ontario, using Comprehensive Two-Dimensional Gas Chromatography and (Ultra)High Resolution Mass Spectrometry. Environmental Science and Technology. 48:10656-10663. 2014
- Identification of Potential Novel Bioaccumulative and Persistent Chemicals in Sediments from Ontario (Canada) Using Scripting Approaches with GC×GC-TOF MS Analysis. Environmental Science and Technology. 48:9591-9599. 2014
- Characterization of Naphthenic Acids by Gas Chromatography-Fourier Transform Ion Cyclotron Resonance Mass Spectrometry. Analytical Chemistry. 86:7666-7673. 2014
- Using mass defect plots as a discovery tool to identify novel fluoropolymer thermal decomposition products. Journal of Mass Spectrometry. 49:291-296. 2014
- Dissociation of CuH+ and ZnH+ complexes of ethylenediamine and their N-methylated homologues: Family and neighbours, but not the same. International Journal of Mass Spectrometry. 354-355:144-151. 2013
- The reaction of the hydrogen-bridged radical cation [NH2COHOCH2]•+ with dioxygen. International Journal of Mass Spectrometry. 354-355:99-104. 2013
- Generation and Dissociation of RCOOCaCl2− and other Carboxylate‐Substituted Superhalogens: CO2 Capture and Implications for Structure Analysis. ChemPlusChem. 78:1184-1189. 2013
- The use of mass defect plots for the identification of (novel) halogenated contaminants in the environment. Analytical and Bioanalytical Chemistry. 405:3289-3297. 2013
- ChemInform Abstract: Catalysis in Hydrogen‐Bridged Radical Cations. ChemInform. 43:no-no. 2012
- Identification and determination of the dechlorination products of Dechlorane 602 in Great Lakes fish and Arctic beluga whales by gas chromatography–high resolution mass spectrometry. Analytical and Bioanalytical Chemistry. 404:2737-2748. 2012
- Catalysis in Hydrogen-Bridged Radical Cations. European Journal of Mass Spectrometry. 18:183-194. 2012
- The Dissociation Chemistry of Ionized Methyl Carbamate and its Isomers Revisited: Theory and Experiment in Concert. European Journal of Mass Spectrometry. 18:149-159. 2012
- The double hydrogen transfer in the 1-methoxy-2-propanol molecular ion: Loss of CH3CO by proton-transport catalysis. International Journal of Mass Spectrometry. 316-318:18-22. 2012
- The hydrogen-bridged radical cation [NH2C O⋯H⋯O CHCH3]+ and its dissociation by proton-transport catalysis. Chemical Physics Letters. 523:20-24. 2012
- A mechanistic study of the prominent loss of H2O from ionized 2-hydroxyaminoethanol. International Journal of Mass Spectrometry. 306:138-149. 2011
- The dissociation chemistry of low-energy N-formylethanolamine ions: Hydrogen-bridged radical cations as key intermediates. International Journal of Mass Spectrometry. 306:9-26. 2011
- Identification of Halohydrins as Potential Disinfection By‐Products in Treated Drinking Water. International Journal of Spectroscopy. 2011. 2011
- The covalently bound dimer ion HC N C NH+ and its neutral counterpart. Chemical Physics Letters. 497:7-11. 2010
- The reaction of the acrylonitrile ion CH2CH−CN+ with HCN: Proton-transport catalysis vs formation of ionized pyrimidine. Chemical Physics Letters. 482:211-216. 2009
- Differentiation of the pyridine radical cation from its distonic isomers by ion–molecule reactions with dioxygen. International Journal of Mass Spectrometry. 286:83-88. 2009
- The quest for the elusive carbodiimide ion HNCNH+ and its generation from ionized cyanamide by proton-transport catalysis. Chemical Physics Letters. 478:144-149. 2009
- The covalently bound HCN dimer ions HCN−NCH+ and HCN−C(N)H+ are stable species in the gas-phase, but the neutral counterparts are not. Chemical Physics Letters. 473:257-262. 2009
- Small (Poly)Unsaturated Oxygen Containing Ions and Molecules: A Brief Assessment of Their Thermochemistry Based on Computational Chemistry. European Journal of Mass Spectrometry. 15:261-273. 2009
- On the interaction of peptides with calcium ions as studied by matrix-assisted laser desorption/ionization Fourier transform mass spectrometry: Towards peptide fishing using metal ion baits. Analytica Chimica Acta. 627:136-147. 2008
- The covalently bound HNC dimer ion HN C C NH+ has a kinetically stable neutral counterpart. Chemical Physics Letters. 462:152-157. 2008
- ChemInform Abstract: Isotopic Labeling in Mass Spectrometry as a Tool for Studying Reaction Mechanisms of Ion Dissociations. ChemInform. 39:no-no. 2008
- The remarkable dissociation chemistry of 2-aminoxyethanol ions NH2OCH2CH2OH+studied by experiment and theory. International Journal of Mass Spectrometry. 269:165-176. 2008
- Does the ion–molecule reaction between HCCH+ and HCN lead to CH2CH–CN+? A computational and experimental study of the reverse process. Chemical Physics Letters. 450:243-247. 2008
- Isotopic labelling in mass spectrometry as a tool for studying reaction mechanisms of ion dissociations. Journal of Labelled Compounds and Radiopharmaceuticals. 50:1115-1123. 2007
- Even‐electron ions: a systematic study of the neutral species lost in the dissociation of quasi‐molecular ions. Journal of Mass Spectrometry. 42:1024-1044. 2007
- Loss of DNC from ionized 4-hydroxypyridine-OD: An intriguing reaction unravelled by theory and experiment. International Journal of Mass Spectrometry. 264:146-156. 2007
- The acrylonitrile dimer ion: A study of its dissociation via self-catalysis, self-protonation and cyclization into the pyrimidine radical cation. International Journal of Mass Spectrometry. 262:88-100. 2007
- The loss of NH2O from the N-hydroxyacetamide radical cation CH3C(O)NHOH+: An ion-catalysed rearrangement. International Journal of Mass Spectrometry. 254:127-135. 2006
- Infrared spectrometric analysis of urinary calculi.. Acta Chirurgica Academiae Scientiarum Hungaricae. 18:49-57. 1977
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preprints
- Fluorotelomer ethoxylates cause developmental toxicity in mice 2023
- Size-resolved identification and quantification of micro/nano-plastics in indoor air using pyrolysis gas chromatography-ion mobility mass spectrometry 2023
- Discovery of Fluorotelomer Sulfones in the Blubber of Greenland Killer Whales (Orcinus Orca)
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theses