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Paul A. Helm

ORCID OpenAlex
35
Papers
1
Tier 1 Papers
3,785
Citations

Affiliations

Papers (35)

Chemical Additive Fingerprinting of Microplastics for Source Tracking: The Effect of Weathering and Sample Processing
2026 ACS ES&T Water 0 citations
Optimized Extraction Methods for Pristine and Aged Microplastics from Complex Water Samples
2025 ACS ES&T Water 3 citations
Fractionation of Anthropogenic Particles (Microplastics and Microfibers) along a 2200 km Transect of Canadian Sediments
2025 ACS ES&T Water 0 citations
Reductions of Plastic Microbeads from Personal Care Products in Wastewater Effluents and Lake Waters Following Regulatory Actions
2024 Frontiers in Plant Science 21 citations
Informing the Exposure Landscape: The Fate of Microplastics in a Large Pelagic In-Lake Mesocosm Experiment
2024 Environmental Science & Technology 19 citations
Size-Resolved Identification and Quantification of Micro/Nanoplastics in Indoor Air Using Pyrolysis Gas Chromatography–Ion Mobility Mass Spectrometry
2024 Journal of the American Society for Mass Spectrometry 13 citations
A temporal record of microplastic accumulation in sediment cores of the Great Lakes, North America, reflects macroeconomic and regional influences
2024 FACETS 10 citations
Microplastics and Anthropogenic Particles in Recreationally Caught Freshwater Fish from an Urbanized Region of the North American Great Lakes
2024 Environmental Health Perspectives 10 citations
Facile detection of microplastics from a variety of environmental samples with conjugated polymer nanoparticles
2024 Environmental Science Advances 4 citations
Maternal exposure to polystyrene nanoplastics impacts developmental milestones and brain structure in mouse offspring
2023 Environmental Science Advances 41 citations
The influence of complex matrices on method performance in extracting and monitoring for microplastics
2023 Chemosphere 28 citations
Source-specific categorization of microplastics in nearshore surface waters of the Great Lakes
2023 Journal of Great Lakes Research 24 citations
Bromine Content Differentiates between Construction and Packaging Foams as Sources of Plastic and Microplastic Pollution
2023 ACS ES&T Water 20 citations
Size-resolved identification and quantification of micro/nano-plastics in indoor air using pyrolysis gas chromatography-ion mobility mass spectrometry
2023 3 citations
Maternal Exposure to Polystyrene Micro- and Nanoplastics Causes Fetal Growth Restriction in Mice
2022 Environmental Science & Technology Letters 93 citations
Maternal exposure to polystyrene microplastics alters placental metabolism in mice
2022 Metabolomics 81 citations
Quantitative assessment of visual microscopy as a tool for microplastic research: Recommendations for improving methods and reporting
2022 Chemosphere 80 citations
Runoff and discharge pathways of microplastics into freshwater ecosystems: A systematic review and meta-analysis
2022 FACETS 37 citations
Factors driving the spatial distribution of microplastics in nearshore and offshore sediment of Lake Huron, North America
2022 Marine Pollution Bulletin 29 citations
Local Monitoring Should Inform Local Solutions: Morphological Assemblages of Microplastics Are Similar within a Pathway, But Relative Total Concentrations Vary Regionally
2022 Environmental Science & Technology 29 citations
A fit-for-purpose categorization scheme for microplastic morphologies
2022 Integrated Environmental Assessment and Management 18 citations
The Tire Wear Compounds 6PPD-Quinone and 1,3-Diphenylguanidine in an Urban Watershed
2021 Archives of Environmental Contamination and Toxicology 264 citations
Evidence of Microplastic Translocation in Wild-Caught Fish and Implications for Microplastic Accumulation Dynamics in Food Webs
2021 Environmental Science & Technology 250 citations
Microplastic contamination in Great Lakes fish
2021 Conservation Biology 92 citations
Microplastics entering northwestern Lake Ontario are diverse and linked to urban sources
2020 Water Research 387 citations
Sampling and Quality Assurance and Quality Control: A Guide for Scientists Investigating the Occurrence of Microplastics Across Matrices
2020 Applied Spectroscopy 333 citations
Microplastic and other anthropogenic microparticles in water and sediments of Lake Simcoe
2020 Journal of Great Lakes Research 89 citations
No evidence of spherical microplastics (10–300 μm) translocation in adult rainbow trout (Oncorhynchus mykiss) after a two-week dietary exposure
2020 PLoS ONE 42 citations
Occurrence, Sources, Transport, and Fate of Microplastics in the Great Lakes–St. Lawrence River Basin
2020 ˜The œhandbook of environmental chemistry 11 citations
Rapid fingerprinting of source and environmental microplastics using direct analysis in real time-high resolution mass spectrometry
2019 Analytica Chimica Acta 54 citations
Factors influencing microplastic abundances in nearshore, tributary and beach sediments along the Ontario shoreline of Lake Erie
2018 Journal of Great Lakes Research 85 citations
Impacts of temperature and selected chemical digestion methods on microplastic particles
2017 Environmental Toxicology and Chemistry 369 citations
Improving microplastics source apportionment: a role for microplastic morphology and taxonomy?
2017 Analytical Methods 145 citations
Sources and sinks of microplastics in Canadian Lake Ontario nearshore, tributary and beach sediments
2016 Marine Pollution Bulletin 682 citations
Hidden plastics of Lake Ontario, Canada and their potential preservation in the sediment record
2015 Environmental Pollution 419 citations