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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 47 15791 14249 3953 3243 156 6515

Clifford H. Watson publications per year

The chart shows the history of publications by Clifford H. Watson between 1966 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Clifford H. Watson published across 60 years, from 1966 to 2025, averaging 3.1 papers a year. Output peaked at 17 publications in 2021. 8 of the 186 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1966 to 2025. Vertical axis: number of publications, 0 to 17. Peak 17 publications in 2021. 1966: 1 publication 1967: 0 publications 1968: 0 publications 1969: 0 publications 1970: 0 publications 1971: 0 publications 1972: 0 publications 1973: 0 publications 1974: 0 publications 1975: 0 publications 1976: 0 publications 1977: 1 publication 1978: 1 publication 1979: 0 publications 1980: 0 publications 1981: 0 publications 1982: 0 publications 1983: 0 publications 1984: 0 publications 1985: 2 publications 1986: 3 publications 1987: 3 publications 1988: 1 publication 1989: 1 publication 1990: 7 publications 1991: 5 publications 1992: 4 publications 1993: 3 publications 1994: 1 publication 1995: 1 publication 1996: 6 publications 1997: 7 publications 1998: 6 publications 1999: 1 publication 2000: 1 publication 2001: 0 publications 2002: 2 publications 2003: 5 publications 2004: 5 publications 2005: 2 publications 2006: 3 publications 2007: 4 publications 2008: 5 publications 2009: 4 publications 2010: 3 publications 2011: 3 publications 2012: 3 publications 2013: 5 publications 2014: 4 publications 2015: 10 publications 2016: 11 publications 2017: 8 publications 2018: 7 publications 2019: 5 publications 2020: 8 publications 2021: 17 publications 2022: 7 publications 2023: 2 publications 2024: 6 publications 2025: 2 publications
1966 2025

186 publications in total across all disciplines

View publications per year as a table
Clifford H. Watson: publications per year, 1966 to 2025
Year Publications
1966 1
1967 0
1968 0
1969 0
1970 0
1971 0
1972 0
1973 0
1974 0
1975 0
1976 0
1977 1
1978 1
1979 0
1980 0
1981 0
1982 0
1983 0
1984 0
1985 2
1986 3
1987 3
1988 1
1989 1
1990 7
1991 5
1992 4
1993 3
1994 1
1995 1
1996 6
1997 7
1998 6
1999 1
2000 1
2001 0
2002 2
2003 5
2004 5
2005 2
2006 3
2007 4
2008 5
2009 4
2010 3
2011 3
2012 3
2013 5
2014 4
2015 10
2016 11
2017 8
2018 7
2019 5
2020 8
2021 17
2022 7
2023 2
2024 6
2025 2
Total 186
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Clifford H. Watson 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 Clifford H. Watson sits on this spectrum.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 63 bars. Horizontal axis: publications, 61–80 to 1,295+. Vertical axis: number of scientists, 0 to 1,350. Most scientists, 1,350, have 161–180 publications. The last bar groups every scientist with 1,295 publications or more. The highlighted bar, 141–160 publications, is where this scientist sits. 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
61–80 publications 1,295+

This scientist: 156 publications — 16th percentile

16% of scientists in this discipline score the same or lower.

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

View publications distribution as a table
Number of Chemistry scientists by publication count, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
Publications Scientists This scientist
61–80 66
81–100 302
101–120 623
121–140 918
141–160 1,218 156
161–180 1,350
181–200 1,344
201–220 1,281
221–240 1,216
241–260 1,100
261–280 979
281–300 939
301–320 764
321–340 643
341–360 628
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270
461–480 265
481–500 252
501–520 201
521–540 185
541–560 148
561–580 148
581–600 132
601–620 114
621–640 104
641–660 91
661–680 92
681–700 73
701–720 57
721–740 54
741–760 67
761–780 45
781–800 46
801–820 39
821–840 32
841–860 36
861–880 29
881–900 26
901–920 24
921–940 14
941–960 23
961–980 28
981–1,000 15
1,001–1,020 29
1,021–1,040 12
1,041–1,060 19
1,061–1,080 12
1,081–1,100 6
1,101–1,120 8
1,121–1,140 12
1,141–1,160 5
1,161–1,180 6
1,181–1,200 14
1,201–1,220 7
1,221–1,240 2
1,241–1,260 6
1,261–1,280 4
1,281–1,294 6
1,295+ 100
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Clifford H. Watson 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 Clifford H. Watson sits on this spectrum.

No. of scientists
250 500 750 1,000
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 159+. Vertical axis: number of scientists, 0 to 1,051. Most scientists, 1,051, have 56–57 D-Index. The last bar groups every scientist with 159 D-Index or more. The highlighted bar, 46–47 D-Index, is where this scientist sits. 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
40–41 D-Index 159+

This scientist: 47 D-Index — 14th percentile

14% of scientists in this discipline score the same or lower.

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

View D-Index distribution as a table
Number of Chemistry scientists by D-index, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
D-Index Scientists This scientist
40–41 289
42–43 612
44–45 808
46–47 776 47
48–49 835
50–51 861
52–53 872
54–55 933
56–57 1,051
58–59 930
60–61 882
62–63 834
64–65 731
66–67 775
68–69 683
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354
82–83 292
84–85 275
86–87 254
88–89 235
90–91 185
92–93 192
94–95 155
96–97 163
98–99 125
100–101 105
102–103 105
104–105 112
106–107 88
108–109 68
110–111 69
112–113 65
114–115 79
116–117 61
118–119 44
120–121 37
122–123 40
124–125 33
126–127 26
128–129 34
130–131 35
132–133 25
134–135 27
136–137 17
138–139 16
140–141 20
142–143 20
144–145 15
146–147 9
148–149 9
150–151 16
152–153 11
154–155 9
156–157 3
158 3
159+ 98
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Overview

Clifford H. Watson is affiliated with the Centers for Disease Control and Prevention in the United States. Their research focuses primarily on fields spanning Medicine and Environmental Science, addressing topics related to health impacts and toxicology.

Their work spans across several interconnected subfields, including Health, Toxicology and Mutagenesis, Physiology, Molecular Biology, Public Health, Environmental and Occupational Health, and Plant Science.

Watson's research covers a variety of topics, notably:

  • Smoking Behavior and Cessation
  • Air Quality and Health Impacts
  • Indoor Air Quality and Microbial Exposure
  • Advanced Chemical Sensor Technologies
  • Toxic Organic Pollutants Impact
  • Obesity, Physical Activity, Diet
  • Biochemical Analysis and Sensing Techniques

Their recent notable publications include:

  • "Characterization of Total and Unprotonated (Free) Nicotine Content of Nicotine Pouch Products", 2021, Nicotine & Tobacco Research
  • "Toxic Metals in Liquid and Aerosol from Pod-Type Electronic Cigarettes", 2020, Journal of Analytical Toxicology
  • "Toxic Metal-Containing Particles in Aerosols from Pod-Type Electronic Cigarettes", 2020, Journal of Analytical Toxicology
  • "Chemical analysis of snus products from the United States and northern Europe", 2020, PLoS ONE
  • "The Impact of Exclusive Use of Very Low Nicotine Cigarettes on Compensatory Smoking: An Inpatient Crossover Clinical Trial", 2020, Cancer Epidemiology Biomarkers & Prevention

Frequent co-authors collaborating with Watson include:

  • Liza Valentín-Blasini
  • Benjamin C. Blount
  • Stephen B. Stanfill
  • Roberto Bravo Cardenas
  • Hang Tran

The research outputs are published across various scientific venues, with multiple contributions to:

  • Chemical Research in Toxicology
  • Journal of Analytical Toxicology
  • Frontiers in Chemistry
  • Tobacco Control
  • Nicotine & Tobacco Research

This profile highlights a multidisciplinary approach with a strong focus on toxicological analysis related to tobacco products, environmental exposures, and public health implications. The diversity in venues and co-authors indicates active engagement within the scientific community addressing these topics.

Best Publications

  • The analysis of water‐soluble polymers by matrix‐assisted laser desorption time‐of‐flight mass spectrometry

    P. O. Danis;D. E. Karr;F. Mayer;A. Holle

  • Determination of 14 Polycyclic Aromatic Hydrocarbons in Mainstream Smoke from Domestic Cigarettes

    Yan S Ding;Jenna S Trommel;Xizheng J Yan;David Ashley

  • Chemical Composition and Evaluation of Nicotine, Tobacco Alkaloids, pH, and Selected Flavors in E-Cigarette Cartridges and Refill Solutions

    Joseph G. Lisko;Hang Tran;Stephen B. Stanfill;Benjamin C. Blount

  • Polycyclic Aromatic Hydrocarbons in the Mainstream Smoke of Popular U.S. Cigarettes.

    An T. Vu;Kenneth M. Taylor;Matthew R. Holman;Yan S. Ding

  • Global surveillance of oral tobacco products: total nicotine, unionised nicotine and tobacco-specific N-nitrosamines

    Stephen B. Stanfill;Gregory N. Connolly;Liqin Zhang;Lily T. Jia

  • Cadmium, lead, and thallium in mainstream tobacco smoke particulate.

    R.S. Pappas;G.M. Polzin;L. Zhang;C.H. Watson

  • Determination of 10 carcinogenic polycyclic aromatic hydrocarbons in mainstream cigarette smoke

    Yan S Ding;David L Ashley;Clifford H Watson

  • Determination of tar, nicotine, and carbon monoxide yields in the mainstream smoke of selected international cigarettes.

    A M Calafat;G M Polzin;J Saylor;P Richter

  • Levels of Tobacco-Specific Nitrosamines and Polycyclic Aromatic Hydrocarbons in Mainstream Smoke from Different Tobacco Varieties

    Yan S Ding;Liqin Zhang;Ram B Jain;Ntasha Jain

  • Cadmium, lead, and thallium in smoke particulate from counterfeit cigarettes compared to authentic US brands.

    R.S. Pappas;G.M. Polzin;C.H. Watson;D.L. Ashley

  • Analysis of Volatile Organic Compounds in Mainstream Cigarette Smoke

    Gregory M. Polzin;Rachel E. Kosa-Maines;David L. Ashley;Clifford H. Watson

  • FTMS studies of mass-selected, large cluster ions produced by direct laser vaporization

    Stephen W McElvany;H.H Nelson;Andrew P Baronavski;Clifford H Watson

  • Toxic Metal Concentrations in Mainstream Smoke from Cigarettes Available in the USA

    R. Steven Pappas;Mark R. Fresquez;Naudia Martone;Clifford H. Watson

  • Proton Affinities of Eight Matrices Used for Matrix‐assisted Laser Desorption/Ionization

    Richard D. Burton;Clifford H. Watson;John R. Eyler;G. Lisa Lang

  • Determination of 14 polycyclic aromatic hydrocarbons in mainstream smoke from U.S. brand and non-U.S. brand cigarettes.

    Yan S Ding;Xizheng J Yan;Ram B Jain;Eugene Lopp

  • Simultaneous determination of five tobacco-specific nitrosamines in mainstream cigarette smoke by isotope dilution liquid chromatography/electrospray ionization tandem mass spectrometry.

    Weijia Wu;David L Ashley;Clifford H Watson

  • Mainstream Smoke Levels of Volatile Organic Compounds in 50 U.S. Domestic Cigarette Brands Smoked With the ISO and Canadian Intense Protocols.

    Daniel Y. Pazo;Fallon Moliere;Maureen M. Sampson;Christopher M. Reese

  • Kinetics and mechanism of nucleophilic displacements with heterocycles as leaving groups. 26. Collisionally activated dissociation of N-alkylpyridinium cations to pyridine and alkyl cations in the gas phase

    Alan R. Katritzky;Clifford H. Watson;Zofia Dega-Szafran;John R. Eyler

  • Simultaneous determination of six mercapturic acid metabolites of volatile organic compounds in human urine.

    Yan S Ding;Benjamin C Blount;Liza Valentin-Blasini;Heather S Applewhite

  • Determination of nicotine and other minor alkaloids in international cigarettes by solid-phase microextraction and gas chromatography/mass spectrometry.

    Weijia Wu;David L Ashley;Clifford H Watson

Frequent Co-Authors

John R. Eyler
John R. Eyler University of Florida
David L. Ashley
David L. Ashley Georgia State University
Benjamin C. Blount
Benjamin C. Blount Centers for Disease Control and Prevention
Alan R. Katritzky
Alan R. Katritzky University of Florida
Dorothy K. Hatsukami
Dorothy K. Hatsukami University of Minnesota
Antonia M. Calafat
Antonia M. Calafat Centers for Disease Control and Prevention
Neal L. Benowitz
Neal L. Benowitz University of California, San Francisco
Mati Karelson
Mati Karelson University of Tartu
Brian A. King
Brian A. King Centers for Disease Control and Prevention
Eric C. Donny
Eric C. Donny Wake Forest University

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