|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
|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
|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
|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
|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
|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
|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
|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
|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
|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
|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
|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
|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
|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
|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
|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
|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
|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
|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
|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