R.W. Frei

9.3k total citations
305 papers, 7.3k citations indexed

About

R.W. Frei is a scholar working on Spectroscopy, Analytical Chemistry and Biomedical Engineering. According to data from OpenAlex, R.W. Frei has authored 305 papers receiving a total of 7.3k indexed citations (citations by other indexed papers that have themselves been cited), including 200 papers in Spectroscopy, 112 papers in Analytical Chemistry and 92 papers in Biomedical Engineering. Recurrent topics in R.W. Frei's work include Analytical Chemistry and Chromatography (175 papers), Analytical chemistry methods development (67 papers) and Advanced Chemical Sensor Technologies (51 papers). R.W. Frei is often cited by papers focused on Analytical Chemistry and Chromatography (175 papers), Analytical chemistry methods development (67 papers) and Advanced Chemical Sensor Technologies (51 papers). R.W. Frei collaborates with scholars based in Netherlands, Canada and United States. R.W. Frei's co-authors include U.A.Th. Brinkman, James F. Lawrence, F. Erni, Gerhardus J. de Jong, C. Gooijer, N.H. Velthorst, Michel W. F. Nielen, C.E. Werkhoven-Goewie, A.H.M.T. Scholten and K. Krummen and has published in prestigious journals such as Analytical Chemistry, Analytical Biochemistry and Journal of Agricultural and Food Chemistry.

In The Last Decade

R.W. Frei

302 papers receiving 5.6k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
R.W. Frei Netherlands 43 4.6k 2.6k 2.3k 1.3k 870 305 7.3k
Jun Haginaka Japan 45 3.8k 0.8× 3.2k 1.2× 1.9k 0.8× 1.3k 1.0× 338 0.4× 240 6.5k
W. Wojnowski Poland 27 2.0k 0.4× 3.2k 1.2× 1.6k 0.7× 767 0.6× 462 0.5× 114 6.7k
Herbert H. Hill United States 55 9.2k 2.0× 2.9k 1.1× 3.4k 1.5× 2.8k 2.1× 533 0.6× 239 11.4k
Gerhardus J. de Jong Netherlands 48 4.7k 1.0× 1.9k 0.7× 3.8k 1.6× 2.2k 1.6× 307 0.4× 247 8.0k
Willie L. Hinze United States 36 2.8k 0.6× 1.5k 0.6× 1.6k 0.7× 826 0.6× 381 0.4× 80 4.8k
José Barbosa Spain 45 2.8k 0.6× 1.8k 0.7× 1.8k 0.8× 1.6k 1.2× 459 0.5× 218 7.3k
C.A.M.G. Cramers Netherlands 42 5.4k 1.2× 3.2k 1.2× 3.9k 1.7× 699 0.5× 213 0.2× 219 8.0k
Arsenio Muñoz de la Peña Spain 42 2.1k 0.5× 2.6k 1.0× 962 0.4× 978 0.7× 607 0.7× 180 5.0k
Günther K. Bonn Austria 47 2.8k 0.6× 1.7k 0.7× 3.4k 1.5× 2.3k 1.7× 615 0.7× 287 8.8k
C. Gooijer Netherlands 36 1.9k 0.4× 1.1k 0.4× 1.7k 0.7× 1.3k 1.0× 721 0.8× 268 6.2k

Countries citing papers authored by R.W. Frei

Since Specialization
Citations

This map shows the geographic impact of R.W. Frei's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by R.W. Frei with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites R.W. Frei more than expected).

Fields of papers citing papers by R.W. Frei

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by R.W. Frei. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by R.W. Frei. The network helps show where R.W. Frei may publish in the future.

Co-authorship network of co-authors of R.W. Frei

This figure shows the co-authorship network connecting the top 25 collaborators of R.W. Frei. A scholar is included among the top collaborators of R.W. Frei based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with R.W. Frei. R.W. Frei is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Gooijer, C., et al.. (1989). Lanthanide luminescence quenching as a detection method in ion chromatography. Journal of Chromatography A. 482(2). 351–359. 17 indexed citations
2.
Brinkman, U.A.Th., R.W. Frei, & H. Lingeman. (1989). Post-column reactors for sensitive and selective detection in high-performance liquid chromatography: Categorization and applications. Journal of Chromatography B Biomedical Sciences and Applications. 492. 251–298. 28 indexed citations
3.
Tarradellas, J., J. Albaigés, & R.W. Frei. (1988). Analysis and fate of pollutants. 3 indexed citations
4.
Maris, F.A., et al.. (1988). On-line post-column extraction in column liquid chromatography with electron-capture detection. Journal of Chromatography A. 435. 297–306. 7 indexed citations
5.
Ruiter, C. De, et al.. (1988). Rapid and simple dansylation of phenolic steroids using a two-phase system and phase transfer catalysis. Journal of Chromatography A. 436(3). 429–436. 36 indexed citations
6.
Šlais, Karel & R.W. Frei. (1987). Open-tubular mixer for gradient preparation in microbore high-performance liquid chromatography. Analytical Chemistry. 59(2). 376–379. 14 indexed citations
7.
Jansen, Hans J., Rolf Jansen, U.A.Th. Brinkman, & R.W. Frei. (1987). Fluorescence enhancement for aflatoxins in HPLC by post-column split-flow iodine addition from a solid-phase iodine reservoir. Chromatographia. 24(1). 555–559. 25 indexed citations
8.
Maris, F.A., et al.. (1986). On-line post-column extraction in column liquid chromatography with electron-capture detection. Chromatographia. 22(7-12). 235–240. 13 indexed citations
9.
Jansen, Hans J., et al.. (1985). Determination of urea and ammonia using ion-pair liquid chromatography with on-line post-column derivatization in an enzymatic solid-phase reactor. Journal of Chromatography A. 325. 255–263. 24 indexed citations
10.
Brinkman, U.A.Th., et al.. (1984). Liquid Chromatographic Residue Analysis of Carbaryl Based on a Post-Column Catalytic Reactor Principle and Fluorigenic Labelling. Analytical Letters. 17(10). 915–931. 24 indexed citations
11.
Veltkamp, A.C., et al.. (1983). Quenched room temperature phosphorescence detection for flow injection analysis and liquid chromatography. Analytical Chemistry. 55(12). 1886–1893. 23 indexed citations
12.
Brinkman, U.A.Th., et al.. (1983). Use of non-segmented flow, post-columns reaction detection with miniaturized HPLC systems. Chromatographia. 17(3). 125–131. 13 indexed citations
13.
14.
Gooijer, C., et al.. (1982). Sensitized room temperature phosphorescence in liquid solutions with 1,4-dibromonaphthalene and biacetyl as acceptors. Analytical Chemistry. 54(6). 891–895. 59 indexed citations
15.
Frei, R.W.. (1979). Recent advances in environmental analysis. 5 indexed citations
16.
Scholten, A.H.M.T. & R.W. Frei. (1979). Identification of ergot alkaloids with a photochemical reaction detector in liquid chromatography. Journal of Chromatography A. 176(3). 349–357. 23 indexed citations
17.
Lindner, Wolfgang & R.W. Frei. (1976). Partition high-pressure liquid-chromatographic systems for the separation of digitalis glycosides of the cardenolide group. Journal of Chromatography A. 117(1). 81–86. 31 indexed citations
18.
Frei, R.W., W. Santi, & Michael H. Thomas. (1976). Liquid chromatography of dansyl derivatives of some alkaloids and the application to the analysis of pharmaceuticals. Journal of Chromatography A. 116(2). 365–377. 40 indexed citations
19.
Pataki, G., et al.. (1969). Quantitative thin-layer chromatography. Journal of Chromatography A. 43. 457–462. 25 indexed citations
20.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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