Citation Rankings
Highly Cited Researchers

Helmholtz-Zentrum für Umweltforschung Highly Cited Researchers CitationNatural Sciences / Chemical Sciences Rankings 2025

Citation Rankings (Highly Cited Researchers) and the list of the most cited and influential researchers cover a wide range of scientific fields, spanning 197 main and sub-disciplines, as well as the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings, offering a unique service. Additionally, the list without CERN, Statistical Data, etc., provided exclusively by “AD Scientific Index”, is part of our effort to balance the situation created by CERN and researchers with statistical data, who have an advantage over others, especially those in the social and humanities fields. There should be new regulations for multi-author and CERN papers. Citation lists also reveal many rule violations and unethical practices. See also for more specific citation analyses: Scientists Last 6 years Citation IndexUniversities Total Citations Rankings 2025 and Universities Last 6 Years Citations Rankings 2025

* Total Citation Counts Rankings
Ranking Based On Selection :1
Germany
Urs Berger
inborn errors of metabolism
LC-MS
analytical chemistry
perfluorinated substances
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,645
8,320
0.532
* Total Citation Counts Rankings
Ranking Based On Selection :2
Germany
Tobias Schulze
Environmental Chemistry
Computational Mass Spectrometry
Non-target Screening
Data Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,319
4,618
0.731
* Total Citation Counts Rankings
Ranking Based On Selection :3
Germany
Katrin Mackenzie
environmental chemistry
environmental catalysis
PFAS
PMT
urban water quality
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,733
1,412
0.378
* Total Citation Counts Rankings
Ranking Based On Selection :4
Germany
Oliver J. Lechtenfeld
Ultra-high resolution mass spectrometry
natural organic matter
biogeochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,291
2,722
0.827
* Total Citation Counts Rankings
Ranking Based On Selection :5
Germany
Qiuguo Fu
Environmental Chemistry
Transformation and Effects
Water quality and reuse
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,612
1,351
0.838
* Total Citation Counts Rankings
Ranking Based On Selection :6
Germany
Riccardo Massei
Danio rerio
Ecotoxicology
Analytical Chemistry
Eco-neurotoxicity
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
909
823
0.905
* Total Citation Counts Rankings
Ranking Based On Selection :7
Germany
Maolida Nihemaiti
Environmental Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
724
667
0.921
* Total Citation Counts Rankings
Ranking Based On Selection :8
Germany
Veronika J Schacht
Chemical Analysis
Persistent Organic Pollutants
Human and Environmental Health
Mass Spectrometry
Gas Chromatography
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
338
225
0.666
* Total Citation Counts Rankings
Ranking Based On Selection :9
Germany
Cindy Weidauer
Analytische Chemie
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
229
150
0.655
* Total Citation Counts Rankings
Ranking Based On Selection :10
Germany
Ramamoorthi Bk
Theoretical and Computational Chemistry
Inorganic Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
53
34
0.642
* Total Citation Counts Rankings
Rankings
54,840
Germany
2,397
16
Ranking Based On Selection: 1
Urs Berger
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,645
8,320
0.532
inborn errors of metabolism
LC-MS
analytical chemistry
perfluorinated substances
* Total Citation Counts Rankings
Rankings
158,378
Germany
6,684
53
Ranking Based On Selection: 2
Tobias Schulze
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,319
4,618
0.731
Environmental Chemistry
Computational Mass Spectrometry
Non-target Screening
Data Science
* Total Citation Counts Rankings
Rankings
261,559
Germany
10,353
89
Ranking Based On Selection: 3
Katrin Mackenzie
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,733
1,412
0.378
environmental chemistry
environmental catalysis
PFAS
PMT
urban water quality
* Total Citation Counts Rankings
Rankings
291,372
Germany
11,382
91
Ranking Based On Selection: 4
Oliver J. Lechtenfeld
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,291
2,722
0.827
Ultra-high resolution mass spectrometry
natural organic matter
biogeochemistry
* Total Citation Counts Rankings
Rankings
500,037
Germany
17,988
126
Ranking Based On Selection: 5
Qiuguo Fu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,612
1,351
0.838
Environmental Chemistry
Transformation and Effects
Water quality and reuse
* Total Citation Counts Rankings
Rankings
700,498
Germany
23,943
159
Ranking Based On Selection: 6
Riccardo Massei
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
909
823
0.905
Danio rerio
Ecotoxicology
Analytical Chemistry
Eco-neurotoxicity
* Total Citation Counts Rankings
Rankings
780,796
Germany
26,314
172
Ranking Based On Selection: 7
Maolida Nihemaiti
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
724
667
0.921
* Total Citation Counts Rankings
Rankings
1,057,545
Germany
35,920
217
Ranking Based On Selection: 8
Veronika J Schacht
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
338
225
0.666
Chemical Analysis
Persistent Organic Pollutants
Human and Environmental Health
Mass Spectrometry
Gas Chromatography
* Total Citation Counts Rankings
Rankings
1,216,047
Germany
41,653
242
Ranking Based On Selection: 9
Cindy Weidauer
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
229
150
0.655
* Total Citation Counts Rankings
Rankings
1,791,057
Germany
57,628
278
Ranking Based On Selection: 10
Ramamoorthi Bk
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
53
34
0.642
Theoretical and Computational Chemistry
Inorganic Chemistry