Stephan Walker

1.7k total citations
42 papers, 1.4k citations indexed

About

Stephan Walker is a scholar working on Spectroscopy, Food Science and Molecular Biology. According to data from OpenAlex, Stephan Walker has authored 42 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 25 papers in Spectroscopy, 19 papers in Food Science and 17 papers in Molecular Biology. Recurrent topics in Stephan Walker's work include Analytical Chemistry and Chromatography (18 papers), Pesticide Residue Analysis and Safety (18 papers) and Mass Spectrometry Techniques and Applications (17 papers). Stephan Walker is often cited by papers focused on Analytical Chemistry and Chromatography (18 papers), Pesticide Residue Analysis and Safety (18 papers) and Mass Spectrometry Techniques and Applications (17 papers). Stephan Walker collaborates with scholars based in United States and Switzerland. Stephan Walker's co-authors include Anton Kaufmann, Patrick Butcher, Mirjam Widmer, Kathryn Maden, David C. Muddiman, Daniel L. Comins, Januka Budhathoki-Uprety, Bruce M. Novak, Laura M. Lilley and Brian N. Papas and has published in prestigious journals such as Analytical Chemistry, Journal of Chromatography A and Analytica Chimica Acta.

In The Last Decade

Stephan Walker

41 papers receiving 1.3k citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Stephan Walker United States	21	702	593	508	237	189	42	1.4k
Eric Gremaud Switzerland	23	291 0.4×	507 0.9×	579 1.1×	278 1.2×	207 1.1×	28	1.8k
Lukáš Václavík Czechia	23	699 1.0×	697 1.2×	656 1.3×	473 2.0×	96 0.5×	31	1.9k
Byungjoo Kim South Korea	25	376 0.5×	322 0.5×	408 0.8×	296 1.2×	71 0.4×	97	1.4k
Helga Trufelli Italy	14	669 1.0×	344 0.6×	502 1.0×	380 1.6×	115 0.6×	21	1.4k
Maurizio Quinto Italy	25	277 0.4×	525 0.9×	527 1.0×	349 1.5×	111 0.6×	98	2.0k
Teresa Cecchi Italy	19	487 0.7×	255 0.4×	311 0.6×	430 1.8×	87 0.5×	73	1.5k
D. Courtheyn Belgium	23	469 0.7×	334 0.6×	548 1.1×	239 1.0×	733 3.9×	67	1.6k
Hu Zhang China	21	368 0.5×	205 0.3×	458 0.9×	290 1.2×	84 0.4×	62	1.2k
R.W. Stephany Netherlands	23	486 0.7×	395 0.7×	493 1.0×	215 0.9×	604 3.2×	83	1.7k
Ziling Lu United States	17	748 1.1×	419 0.7×	429 0.8×	391 1.6×	119 0.6×	27	1.9k

Countries citing papers authored by Stephan Walker

Since Specialization

Citations

This map shows the geographic impact of Stephan Walker'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 Stephan Walker with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Stephan Walker more than expected).

Fields of papers citing papers by Stephan Walker

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Stephan Walker. 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 Stephan Walker. The network helps show where Stephan Walker may publish in the future.

Co-authorship network of co-authors of Stephan Walker

This figure shows the co-authorship network connecting the top 25 collaborators of Stephan Walker. A scholar is included among the top collaborators of Stephan Walker 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 Stephan Walker. Stephan Walker is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Kaufmann, Anton, et al.. (2024). Improved method robustness and ruggedness in liquid chromatography–mass spectrometry by increasing the acid content of the mobile phase. Journal of Chromatography A. 1717. 464694–464694. 2 indexed citations

Kaufmann, Anton, Patrick Butcher, Kathryn Maden, Stephan Walker, & Mirjam Widmer. (2023). Assessment and validation of the p-QuEChERS sample preparation methodology for the analysis of >200 veterinary drugs in various animal-based food matrices. Food Additives & Contaminants Part A. 40(3). 356–372. 12 indexed citations

Kaufmann, Anton, Patrick Butcher, Kathryn Maden, Stephan Walker, & Mirjam Widmer. (2022). Improving the QuEChERS Liquid/Liquid Extraction of Analytes With Widely Varying Physicochemical Properties: Example of 201 Veterinary Drugs in Milk. Journal of AOAC International. 105(4). 1030–1042. 18 indexed citations

Kaufmann, Anton, Patrick Butcher, Kathryn Maden, Stephan Walker, & Mirjam Widmer. (2022). Simplifying Nontargeted Analysis of PFAS in Complex Food Matrixes. Journal of AOAC International. 105(5). 1280–1287. 29 indexed citations

Kaufmann, Anton, et al.. (2020). Does the ion mobility resolving power as provided by commercially available ion mobility quadrupole time-of-flight mass spectrometry instruments permit the unambiguous identification of small molecules in complex matrices?. Analytica Chimica Acta. 1107. 113–126. 19 indexed citations

Kaufmann, Anton, Patrick Butcher, Kathryn Maden, Stephan Walker, & Mirjam Widmer. (2020). Optimized multimatrix calibration concept for liquid chromatography mass spectrometry-based bioanalysis methods. Journal of Chromatography B. 1159. 122393–122393. 2 indexed citations

Kaufmann, Anton, Mirjam Widmer, Kathryn Maden, Patrick Butcher, & Stephan Walker. (2018). Analysis of a variety of inorganic and organic additives in food products by ion-pairing liquid chromatography coupled to high-resolution mass spectrometry. Analytical and Bioanalytical Chemistry. 410(22). 5629–5640. 12 indexed citations

Kaufmann, Anton, et al.. (2018). High-resolution mass spectrometry–based multi-residue method covering relevant steroids, stilbenes and resorcylic acid lactones in a variety of animal-based matrices. Analytica Chimica Acta. 1054. 59–73. 15 indexed citations

Kaufmann, Anton & Stephan Walker. (2016). Nested data independent MS/MS acquisition. Analytical and Bioanalytical Chemistry. 408(18). 5031–5040. 6 indexed citations

10.

Hecht, Elizabeth S., Elizabeth H. Scholl, Stephan Walker, et al.. (2015). Relative Quantification and Higher-Order Modeling of the Plasma Glycan Cancer Burden Ratio in Ovarian Cancer Case-Control Samples. Journal of Proteome Research. 14(10). 4394–4401. 17 indexed citations

11.

Kaufmann, Anton, Patrick Butcher, Kathryn Maden, Stephan Walker, & Mirjam Widmer. (2014). Multi-residue quantification of veterinary drugs in milk with a novel extraction and cleanup technique: Salting out supported liquid extraction (SOSLE). Analytica Chimica Acta. 820. 56–68. 49 indexed citations

12.

Kaufmann, Anton, et al.. (2014). Determination of nitrofuran and chloramphenicol residues by high resolution mass spectrometry versus tandem quadrupole mass spectrometry. Analytica Chimica Acta. 862. 41–52. 94 indexed citations

13.

Kaufmann, Anton, et al.. (2014). Reliability of veterinary drug residue confirmation: High resolution mass spectrometry versus tandem mass spectrometry. Analytica Chimica Acta. 856. 54–67. 39 indexed citations

14.

Kaufmann, Anton & Stephan Walker. (2012). Post-run target screening strategy for ultra high performance liquid chromatography coupled to Orbitrap based veterinary drug residue analysis in animal urine. Journal of Chromatography A. 1292. 104–110. 26 indexed citations

15.

Kaufmann, Anton, et al.. (2012). Study of High-Resolution Mass Spectrometry Technology as a Replacement for Tandem Mass Spectrometry in the Field of Quantitative Pesticide Residue Analysis. Journal of AOAC International. 95(2). 528–548. 29 indexed citations

16.

Kaufmann, Anton, et al.. (2011). Quantitative and confirmative performance of liquid chromatography coupled to high‐resolution mass spectrometry compared to tandem mass spectrometry. Rapid Communications in Mass Spectrometry. 25(7). 979–992. 83 indexed citations

17.

Kaufmann, Anton, Patrick Butcher, Kathryn Maden, Stephan Walker, & Mirjam Widmer. (2011). Quantification of anthelmintic drug residues in milk and muscle tissues by liquid chromatography coupled to Orbitrap and liquid chromatography coupled to tandem mass spectrometry. Talanta. 85(2). 991–1000. 51 indexed citations

18.

Kaufmann, Anton, et al.. (2011). Semi-targeted residue screening in complex matrices with liquid chromatography coupled to high resolution mass spectrometry: current possibilities and limitations. The Analyst. 136(9). 1898–1898. 40 indexed citations

19.

Kaufmann, Anton, et al.. (2010). Development of an improved high resolution mass spectrometry based multi-residue method for veterinary drugs in various food matrices. Analytica Chimica Acta. 700(1-2). 86–94. 111 indexed citations

20.

Kaufmann, Anton, Patrick Butcher, Kathryn Maden, Stephan Walker, & Mirjam Widmer. (2010). Comprehensive comparison of liquid chromatography selectivity as provided by two types of liquid chromatography detectors (high resolution mass spectrometry and tandem mass spectrometry): “Where is the crossover point?”. Analytica Chimica Acta. 673(1). 60–72. 153 indexed citations

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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