World's Best Scientists 2026 revealed!
André J. Simpson

André J. Simpson

D-Index & Metrics

Chemistry

D-Index
69
Citations
16967
World Ranking
6189
National Ranking
161

André J. Simpson publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where André J. Simpson sits on this spectrum.

61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61 publications 1,295+

This scientist: 316 publications — 67th percentile

67% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

André J. Simpson D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where André J. Simpson sits on this spectrum.

40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40 D-Index 159+

This scientist: 69 D-Index — 66th percentile

66% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

Overview

André J. Simpson is affiliated with the University of Toronto in Canada and specializes primarily in Environmental Science. Their research portfolio includes significant contributions across several subfields including Nuclear and High Energy Physics, Spectroscopy, Molecular Biology, Radiology, Nuclear Medicine and Imaging, as well as Health, Toxicology and Mutagenesis.

The main topics of their work focus on advanced techniques and applications of Nuclear Magnetic Resonance (NMR) spectroscopy and Metabolomics coupled with Mass Spectrometry. Key research interests include:

  • NMR spectroscopy and applications
  • Metabolomics and Mass Spectrometry Studies
  • Advanced NMR Techniques and Applications
  • Advanced MRI Techniques and Applications
  • Microplastics and Plastic Pollution
  • Toxic Organic Pollutants Impact
  • Microfluidic and Capillary Electrophoresis Applications

Frequently publishing in analytical chemistry and environmental science venues, the scientist has contributed notably to journals such as:

  • Analytical Chemistry
  • Magnetic Resonance in Chemistry
  • Journal of Chemical Education
  • ACS Earth and Space Chemistry
  • Metabolomics

Selected recent papers include:

  • "A ubiquitous tire rubber-derived chemical induces acute mortality in coho salmon" (2020), published in Science
  • "Aqueous Photoreactions of Wood Smoke Brown Carbon" (2020), published in ACS Earth and Space Chemistry
  • "Maternal exposure to polystyrene microplastics alters placental metabolism in mice" (2022), published in Metabolomics
  • "Chlorines Are Not Evenly Substituted in Chlorinated Paraffins: A Predicted NMR Pattern Matching Framework for Isomeric Discrimination in Complex Contaminant Mixtures" (2020), published in Environmental Science & Technology Letters
  • "Gas Chromatography-(Cyclic) Ion Mobility Mass Spectrometry: A Novel Platform for the Discovery of Unknown Per-/Polyfluoroalkyl Substances" (2022), published in Analytical Chemistry

André J. Simpson collaborates frequently with a consistent core of co-authors, including Ronald Soong, Myrna J. Simpson, Rajshree Ghosh Biswas, Daniel H. Lysak, and Amy Jenne.

Best Publications

  • A ubiquitous tire rubber–derived chemical induces acute mortality in coho salmon

    Zhenyu Tian;Haoqi Zhao;Katherine T. Peter;Melissa Gonzalez

  • Microbially derived inputs to soil organic matter: are current estimates too low?

    André J Simpson;Myrna J Simpson;Emma Smith;Brian P Kelleher

  • Chemical and mineralogical controls on humic acid sorption to clay mineral surfaces

    Xiaojuan Feng;André J. Simpson;Myrna J. Simpson

  • Humic Substances in Soils: Are They Really Chemically Distinct?

    Brian P Kelleher;Andre J Simpson

  • Molecular structures and associations of humic substances in the terrestrial environment

    André J. Simpson;William L. Kingery;Michael H. B. Hayes;Manfred Spraul

  • NMR spectroscopy in environmental research: From molecular interactions to global processes

    André J. Simpson;David J. McNally;Myrna J. Simpson

  • Physical, chemical, and biochemical mechanisms of soil organic matter stabilization under conservation tillage systems: A central role for microbes and microbial by-products in C sequestration

    César Plaza;Denis Courtier-Murias;José M. Fernández;Alfredo Polo

  • Increased cuticular carbon sequestration and lignin oxidation in response to soil warming

    Xiaojuan Feng;André J. Simpson;Kevin P. Wilson;D. Dudley Williams

  • Major Structural Components in Freshwater Dissolved Organic Matter

    Buuan Lam;Andrew Baer;Mehran Alaee;Brent Lefebvre

  • Shifts in microbial community and water-extractable organic matter composition with biochar amendment in a temperate forest soil

    Perry J. Mitchell;André J. Simpson;Ronald Soong;Myrna J. Simpson

  • Determining the molecular weight, aggregation, structures and interactions of natural organic matter using diffusion ordered spectroscopy

    André J. Simpson

  • Purge NMR: effective and easy solvent suppression.

    Andre J. Simpson;Sarah A. Brown

  • Unraveling the Structural Components of Soil Humin by Use of Solution-State Nuclear Magnetic Resonance Spectroscopy

    Andre J. Simpson;Guixue Song;Emma Smith;Buuan Lam

  • Cross-coupling of sulfonamide antimicrobial agents with model humic constituents.

    Heidi M. Bialk;and André J. Simpson;Joel A. Pedersen

  • High resolution electrospray ionization mass spectrometry and 2D solution NMR for the analysis of DOM extracted by C18 solid phase disk

    Sunghwan Kim;Andre J. Simpson;Elizabeth B. Kujawinski;Michael A. Freitas

  • The Chemical Ecology of Soil Organic Matter Molecular Constituents

    Myrna J. Simpson;André J. Simpson

  • Direct 1H NMR spectroscopy of dissolved organic matter in natural waters

    Buuan Lam;André J. Simpson

  • The Application of 1H HR-MAS NMR Spectroscopy for the Study of Structures and Associations of Organic Components at the Solid−Aqueous Interface of a Whole Soil

    André J. Simpson;William L. Kingery;David R. Shaw;Manfred Spraul

  • HILIC-NMR: toward the identification of individual molecular components in dissolved organic matter.

    Gwen C. Woods;Myrna J. Simpson;Philip J. Koerner;Antonia Napoli

  • Nuclear magnetic resonance spectroscopy and its key role in environmental research.

    Andre J. Simpson;Myrna J. Simpson;Ronald Soong

  • 3-D Structural Modeling of Humic Acids through Experimental Characterization, Computer Assisted Structure Elucidation and Atomistic Simulations. 1. Chelsea Soil Humic Acid

    Mamadou S. Diallo;Andre Simpson;Paul L. Gassman;Jean Loup Faulon

Frequent Co-Authors

Myrna J. Simpson
Myrna J. Simpson University of Toronto
Wolfgang Bermel
Wolfgang Bermel University of Florence
Patrick G. Hatcher
Patrick G. Hatcher Old Dominion University
Manfred Spraul
Manfred Spraul University of Aveiro
Eric J. Reiner
Eric J. Reiner Ministry of the Environment, Conservation and Parks
George B. Arhonditsis
George B. Arhonditsis University of Toronto
Antony J. Williams
Antony J. Williams Environmental Protection Agency
Malcolm M. Campbell
Malcolm M. Campbell University of Guelph
Kate Lajtha
Kate Lajtha Oregon State University
Joann K. Whalen
Joann K. Whalen McGill University

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