| Sources and sinks of microplastics in Canadian Lake Ontario nearshore, tributary and beach sediments A Ballent, PL Corcoran, O Madden, PA Helm, FJ Longstaffe Marine pollution bulletin 110 (1), 383-395, 2016 | 618 | 2016 |
| Fluorinated organic compounds in an eastern Arctic marine food web GT Tomy, W Budakowski, T Halldorson, PA Helm, GA Stern, K Friesen, ... Environmental science & technology 38 (24), 6475-6481, 2004 | 515 | 2004 |
| Persistent organic pollutants and mercury in marine biota of the Canadian Arctic: an overview of spatial and temporal trends BM Braune, PM Outridge, AT Fisk, DCG Muir, PA Helm, K Hobbs, ... Science of the total environment 351, 4-56, 2005 | 485 | 2005 |
| Hidden plastics of Lake Ontario, Canada and their potential preservation in the sediment record PL Corcoran, T Norris, T Ceccanese, MJ Walzak, PA Helm, CH Marvin Environmental Pollution 204, 17-25, 2015 | 419 | 2015 |
| Temporal and spatial variabilities of atmospheric polychlorinated biphenyls (PCBs), organochlorine (OC) pesticides and polycyclic aromatic hydrocarbons (PAHs) in the Canadian … H Hung, P Blanchard, CJ Halsall, TF Bidleman, GA Stern, P Fellin, ... Science of the Total Environment 342 (1-3), 119-144, 2005 | 342 | 2005 |
| Impacts of temperature and selected chemical digestion methods on microplastic particles K Munno, PA Helm, DA Jackson, C Rochman, A Sims Environmental toxicology and chemistry 37 (1), 91-98, 2018 | 326 | 2018 |
| Microplastics entering northwestern Lake Ontario are diverse and linked to urban sources J Grbić, P Helm, S Athey, CM Rochman Water research 174, 115623, 2020 | 284 | 2020 |
| Sampling in the Great Lakes for pharmaceuticals, personal care products, and endocrine‐disrupting substances using the passive polar organic chemical integrative sampler H Li, PA Helm, CD Metcalfe Environmental Toxicology and Chemistry: An International Journal 29 (4), 751-762, 2010 | 284 | 2010 |
| Isomers of dechlorane plus in Lake Winnipeg and Lake Ontario food webs GT Tomy, K Pleskach, N Ismail, DM Whittle, PA Helm, ED Sverko, D Zaruk, ... Environmental science & technology 41 (7), 2249-2254, 2007 | 277 | 2007 |
| Sampling and quality assurance and quality control: a guide for scientists investigating the occurrence of microplastics across matrices SM Brander, VC Renick, MM Foley, C Steele, M Woo, A Lusher, S Carr, ... Applied Spectroscopy 74 (9), 1099-1125, 2020 | 255 | 2020 |
| Dechlorane plus levels in sediment of the lower Great Lakes E Sverko, GT Tomy, CH Marvin, D Zaruk, E Reiner, PA Helm, B Hill, ... Environmental science & technology 42 (2), 361-366, 2008 | 243 | 2008 |
| Chlordane enantiomers and temporal trends of chlordane isomers in arctic air TF Bidleman, LMM Jantunen, PA Helm, E Brorström-Lundén, S Juntto Environmental science & technology 36 (4), 539-544, 2002 | 240 | 2002 |
| Passive sampling methods for contaminated sediments: Scientific rationale supporting use of freely dissolved concentrations P Mayer, TF Parkerton, RG Adams, JG Cargill, J Gan, T Gouin, ... Integrated environmental assessment and management 10 (2), 197-209, 2014 | 198 | 2014 |
| The effects of dissolved organic matter and pH on sampling rates for polar organic chemical integrative samplers (POCIS) H Li, PA Helm, G Paterson, CD Metcalfe Chemosphere 83 (3), 271-280, 2011 | 171 | 2011 |
| Current combustion-related sources contribute to polychlorinated naphthalene and dioxin-like polychlorinated biphenyl levels and profiles in air in Toronto, Canada PA Helm, TF Bidleman Environmental Science & Technology 37 (6), 1075-1082, 2003 | 168 | 2003 |
| Identification and screening analysis of halogenated norbornene flame retardants in the Laurentian Great Lakes: Dechloranes 602, 603, and 604 L Shen, EJ Reiner, KA MacPherson, TM Kolic, ED Sverko, PA Helm, ... Environmental science & technology 44 (2), 760-766, 2010 | 166 | 2010 |
| Enantioselective bioaccumulation of hexabromocyclododecane and congener-specific accumulation of brominated diphenyl ethers in an eastern Canadian Arctic marine food web GT Tomy, K Pleskach, T Oswald, T Halldorson, PA Helm, G MacInnis, ... Environmental Science & Technology 42 (10), 3634-3639, 2008 | 166 | 2008 |
| PCBs, PBDEs, and PAHs in Toronto air: spatial and seasonal trends and implications for contaminant transport L Melymuk, M Robson, PA Helm, ML Diamond Science of the Total Environment 429, 272-280, 2012 | 158 | 2012 |
| Polychlorinated naphthalenes in UK soils: time trends, markers of source, and equilibrium status SN Meijer, T Harner, PA Helm, CJ Halsall, AE Johnston, KC Jones Environmental Science & Technology 35 (21), 4205-4213, 2001 | 154 | 2001 |
| Evaluation of passive air sampler calibrations: Selection of sampling rates and implications for the measurement of persistent organic pollutants in air L Melymuk, M Robson, PA Helm, ML Diamond Atmospheric Environment 45 (10), 1867-1875, 2011 | 152 | 2011 |
