University, Subject, Country, Region, World
US Environmental Protection Agency 34 Scientists Subject Rankings - 2025
The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 197 sub-branches at global, national, and regional levels. These analyses are based on indicators such as the H-index, i10-index, and citation count, including their values from the last 6 years. As of Feb 03, 2025, the rankings are determined according to the Total H Index. BETA VERSION: The subject field rankings for the world, regions, countries, and universities are currently in their Beta phase. This is due to the exclusion of (870.053) scientists categorized under ‘Others’, whose profiles have yet to be determined, edited, or classified. As updates are made to these fields, the rankings will be adjusted accordingly. Note: Please keep this in mind while reviewing the rankings. For further details, explore our [University Subject Rankings].
* Total H IndexRankings
Ranking Based On Selection: 1
Chemistry
Cheminformatics
Nuclear Magnetic Resonance
Drug Discovery
Metrics
H-Index
i10 Index
Citation Counts
71
265
19,101
* Total H IndexRankings
Ranking Based On Selection: 2
Computational chemistry
cheminformatics
toxicology
Metrics
H-Index
i10 Index
Citation Counts
66
113
17,002
* Total H IndexRankings
Ranking Based On Selection: 3
Atmospheric Chemistry
Metrics
H-Index
i10 Index
Citation Counts
59
91
11,861
* Total H IndexRankings
Ranking Based On Selection: 4
Aerosol physics and chemistry
Air quality
Metrics
H-Index
i10 Index
Citation Counts
46
68
8,533
* Total H IndexRankings
Ranking Based On Selection: 5
drinking water corrosion
aquatic chemistry of inorganics
lead
copper
geochemical equilibria
Metrics
H-Index
i10 Index
Citation Counts
42
87
6,270
* Total H IndexRankings
Ranking Based On Selection: 6
Nanotechnolgy
water pollution
green chemistry
Metrics
H-Index
i10 Index
Citation Counts
41
108
5,217
* Total H IndexRankings
Ranking Based On Selection: 7
Sustainable Chemistry
Metrics
H-Index
i10 Index
Citation Counts
34
66
6,446
* Total H IndexRankings
Ranking Based On Selection: 8
Mass Spectrometry
Environmental Chemistry
PFAS
Non-Targeted Analysis
Metrics
H-Index
i10 Index
Citation Counts
27
44
3,613
* Total H IndexRankings
Ranking Based On Selection: 9
geochemistry
soils
Nanoparticles
X-ray Absorption Spectroscopy
Heavy Metals
Metrics
H-Index
i10 Index
Citation Counts
27
47
5,088
* Total H IndexRankings
Ranking Based On Selection: 10
Computational toxicology
alternatives assessment
QSAR
Metrics
H-Index
i10 Index
Citation Counts
27
34
4,227
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* Total H IndexRankings
Ranking Based On Selection: 11
Environmental chemistry and toxicology
Metrics
H-Index
i10 Index
Citation Counts
26
44
2,169
* Total H IndexRankings
Ranking Based On Selection: 12
wetland and sea level rise
Metrics
H-Index
i10 Index
Citation Counts
26
62
7,923
* Total H IndexRankings
Ranking Based On Selection: 13
atmospheric chemistry
analytical chemistry
Metrics
H-Index
i10 Index
Citation Counts
24
30
3,275
* Total H IndexRankings
Ranking Based On Selection: 14
Atmospheric Chemistry
Metrics
H-Index
i10 Index
Citation Counts
23
27
2,251
* Total H IndexRankings
Ranking Based On Selection: 15
Atmospheric Chemistry
Aerosols
Air Quality
Metrics
H-Index
i10 Index
Citation Counts
23
29
2,178
* Total H IndexRankings
Ranking Based On Selection: 16
environmental analytical chemistry
Metrics
H-Index
i10 Index
Citation Counts
23
30
3,898
* Total H IndexRankings
Ranking Based On Selection: 17
Environmental Chemistry
Analytical Chemistry
High Resolution Mass Spectrometry
Perfluoroalkyl
Metrics
H-Index
i10 Index
Citation Counts
22
26
2,212
* Total H IndexRankings
Ranking Based On Selection: 18
environmental chemistry
mass spectometry
Metrics
H-Index
i10 Index
Citation Counts
21
26
2,067
* Total H IndexRankings
Ranking Based On Selection: 19
Environmental Analytical Chemistry
Metrics
H-Index
i10 Index
Citation Counts
20
25
4,467
* Total H IndexRankings
Ranking Based On Selection: 20
Sustainable Chemistry
Medicinal Chemistry
Organic Chemistry
Metrics
H-Index
i10 Index
Citation Counts
20
24
1,949
* Total H IndexRankings
Ranking Based On Selection: 21
Environmental Toxicology
Environmental chemistry
Risk assessment
Metrics
H-Index
i10 Index
Citation Counts
19
21
1,378
* Total H IndexRankings
Ranking Based On Selection: 22
Environmental Chemistry
Analytical Chemistry
Non-Targeted Analysis
Metrics
H-Index
i10 Index
Citation Counts
18
23
1,247
* Total H IndexRankings
Ranking Based On Selection: 23
Atmospheric Chemistry
Isotope Geochemistry
Environmental Chemistry
Metrics
H-Index
i10 Index
Citation Counts
18
23
1,059
* Total H IndexRankings
Ranking Based On Selection: 24
environmental analytical chemistry
Metrics
H-Index
i10 Index
Citation Counts
18
22
2,822
* Total H IndexRankings
Ranking Based On Selection: 25
environmental chemistry
Metrics
H-Index
i10 Index
Citation Counts
18
20
894
Antony John Williams
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
71
265
19,101
Chemistry
Cheminformatics
Nuclear Magnetic Resonance
Drug Discovery
Ann M Richard
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
66
113
17,002
Computational chemistry
cheminformatics
toxicology
John H Offenberg
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
59
91
11,861
Havala Ot Pye
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
46
68
8,533
Aerosol physics and chemistry
Air quality
Michael Schock
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
42
87
6,270
drinking water corrosion
aquatic chemistry of inorganics
lead
copper
geochemical equilibria
Endalkachew Sahle-Demessie
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
41
108
5,217
Nanotechnolgy
water pollution
green chemistry
Michael Gonzalez
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
34
66
6,446
James Mccord
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
27
44
3,613
Mass Spectrometry
Environmental Chemistry
PFAS
Non-Targeted Analysis
Todd Luxton
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
27
47
5,088
geochemistry
soils
Nanoparticles
X-ray Absorption Spectroscopy
Heavy Metals
Todd Martin
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
27
34
4,227
Computational toxicology
alternatives assessment
QSAR
Enroll all your faculty members with discounted institutional membership to showcase your institution's academic strength to the world in the best way possible – join now and achieve results fast!
Brett R Blackwell
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
26
44
2,169
Environmental chemistry and toxicology
Roxanne Johnson
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
26
62
7,923
Theran Riedel
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
24
30
3,275
atmospheric chemistry
analytical chemistry
Emma D'Ambro
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
23
27
2,251
Brett Gantt
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
23
29
2,178
Atmospheric Chemistry
Aerosols
Air Quality
Susan T Glassmeyer
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
23
30
3,898
environmental analytical chemistry
Seth R Newton
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
22
26
2,212
Environmental Chemistry
Analytical Chemistry
High Resolution Mass Spectrometry
Perfluoroalkyl
Allison L Phillips
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
21
26
2,067
environmental chemistry
mass spectometry
Angela Batt
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
20
25
4,467
Environmental Analytical Chemistry
Buchi Reddy Vaddula
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
20
24
1,949
Sustainable Chemistry
Medicinal Chemistry
Organic Chemistry
Shibin Li
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
19
21
1,378
Environmental Toxicology
Environmental chemistry
Risk assessment
Hannah K Liberatore
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
18
23
1,247
Environmental Chemistry
Analytical Chemistry
Non-Targeted Analysis
Andrew Whitehill
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
18
23
1,059
Atmospheric Chemistry
Isotope Geochemistry
Environmental Chemistry
Elin Ulrich
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
18
22
2,822
environmental analytical chemistry
David Katz
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
18
20
894