John A. G. Roach

3.3k total citations
69 papers, 2.5k citations indexed

About

John A. G. Roach is a scholar working on Nutrition and Dietetics, Spectroscopy and Food Science. According to data from OpenAlex, John A. G. Roach has authored 69 papers receiving a total of 2.5k indexed citations (citations by other indexed papers that have themselves been cited), including 27 papers in Nutrition and Dietetics, 24 papers in Spectroscopy and 14 papers in Food Science. Recurrent topics in John A. G. Roach's work include Fatty Acid Research and Health (25 papers), Analytical Chemistry and Chromatography (21 papers) and Advanced Chemical Sensor Technologies (11 papers). John A. G. Roach is often cited by papers focused on Fatty Acid Research and Health (25 papers), Analytical Chemistry and Chromatography (21 papers) and Advanced Chemical Sensor Technologies (11 papers). John A. G. Roach collaborates with scholars based in United States, Canada and Germany. John A. G. Roach's co-authors include Magdi M. Mossoba, M. P. Yurawecz, John K. G. Kramer, Najibullah Sehat, Denis Andrzejewski, Steven M. Musser, Klaus Eulitz, Martha L. Gay, Yuoh Ku and Jan Fritsche and has published in prestigious journals such as Journal of the American Chemical Society, Analytical Chemistry and Journal of Agricultural and Food Chemistry.

In The Last Decade

John A. G. Roach

69 papers receiving 2.3k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
John A. G. Roach United States 25 1.2k 549 533 456 401 69 2.5k
Jan Fritsche Germany 28 1.4k 1.2× 473 0.9× 439 0.8× 484 1.1× 224 0.6× 85 2.6k
Gerardo Palla Italy 32 400 0.3× 153 0.3× 731 1.4× 772 1.7× 335 0.8× 77 2.7k
Franz Ulberth Belgium 27 417 0.4× 105 0.2× 736 1.4× 601 1.3× 185 0.5× 108 2.4k
Margarida A. Ferreira Portugal 31 300 0.3× 117 0.2× 758 1.4× 669 1.5× 582 1.5× 70 2.5k
R. Codony Spain 33 942 0.8× 81 0.1× 452 0.8× 687 1.5× 437 1.1× 97 3.4k
Jan Velı́šek Czechia 34 458 0.4× 82 0.1× 976 1.8× 899 2.0× 865 2.2× 118 3.4k
William Craig Byrdwell United States 29 440 0.4× 251 0.5× 282 0.5× 1.1k 2.5× 116 0.3× 73 2.4k
Jacques Vervoort Netherlands 34 469 0.4× 105 0.2× 604 1.1× 1.6k 3.5× 863 2.2× 74 3.4k
Gerhard Sontag Austria 27 270 0.2× 84 0.2× 650 1.2× 514 1.1× 647 1.6× 85 2.3k
R. A. Barford United States 17 424 0.4× 298 0.5× 349 0.7× 558 1.2× 242 0.6× 48 1.7k

Countries citing papers authored by John A. G. Roach

Since Specialization
Citations

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

Fields of papers citing papers by John A. G. Roach

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by John A. G. Roach. 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 John A. G. Roach. The network helps show where John A. G. Roach may publish in the future.

Co-authorship network of co-authors of John A. G. Roach

This figure shows the co-authorship network connecting the top 25 collaborators of John A. G. Roach. A scholar is included among the top collaborators of John A. G. Roach 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 John A. G. Roach. John A. G. Roach 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.
Roach, John A. G., et al.. (2011). Evaluation and single laboratory validation of an on-line turbulent flow extraction tandem mass spectrometry method for melamine in infant formula. Journal of Chromatography A. 1218(28). 4284–4290. 11 indexed citations
2.
Roach, John A. G., et al.. (2006). Determination of Usnic Acid in Lichen Toxic to Elk by Liquid Chromatography with Ultraviolet and Tandem Mass Spectrometry Detection. Journal of Agricultural and Food Chemistry. 54(7). 2484–2490. 28 indexed citations
3.
Andrzejewski, Denis, John A. G. Roach, Martha L. Gay, & Steven M. Musser. (2004). Analysis of Coffee for the Presence of Acrylamide by LC-MS/MS. Journal of Agricultural and Food Chemistry. 52(7). 1996–2002. 154 indexed citations
4.
Roach, John A. G., Denis Andrzejewski, Martha L. Gay, David A. Nortrup, & Steven M. Musser. (2003). Rugged LC-MS/MS Survey Analysis for Acrylamide in Foods. Journal of Agricultural and Food Chemistry. 51(26). 7547–7554. 142 indexed citations
5.
Roach, John A. G., Allan R. Brause, Thomas Eisele, & Heidi S Rupp. (2002). HPLC Detection of Patulin in Apple Juice with GC/MS Confirmation of Patulin Identity. Advances in experimental medicine and biology. 504. 135–140. 15 indexed citations
6.
Roach, John A. G.. (2001). Analysis of CLA derivatives by GC/MS. European Journal of Lipid Science and Technology. 103(9). 621–624. 1 indexed citations
7.
Roach, John A. G., et al.. (2000). Capillary Gas Chromatography/Mass Spectrometry with Chemical Ionization and Negative Ion Detection for Confirmation of Identity of Patulin in Apple Juice. Journal of AOAC International. 83(1). 104–112. 27 indexed citations
8.
Rickert, Rainer, Hans Steinhart, Jan Fritsche, et al.. (1999). Enhanced Resolution of Conjugated Linoleic Acid Isomers by Tandem-Column Silver-Ion High Performance Liquid Chromatography. Journal of High Resolution Chromatography. 22(3). 144–148. 48 indexed citations
9.
Rickert, Rainer, Hans Steinhart, Jan Fritsche, et al.. (1999). Enhanced Resolution of Conjugated Linoleic Acid Isomers by Tandem-Column Silver-Ion High Performance Liquid Chromatography. Journal of High Resolution Chromatography. 22(3). 144–148. 2 indexed citations
10.
Mossoba, Magdi M., John K. G. Kramer, M. P. Yurawecz, et al.. (1999). Impact of novel methodologies on the analysis of conjugated linoleic acid (CLA). Implications of CLA feeding studies. Fette Seifen Anstrichmittel. 101(7). 235–243. 10 indexed citations
11.
Yurawecz, M. P., et al.. (1999). Variations in isomer distribution in commercially available conjugated linoleic acid. Fette Seifen Anstrichmittel. 101(8). 277–282. 30 indexed citations
12.
Mossoba, Magdi M., M. P. Yurawecz, J. K. G. Kramer, et al.. (1999). Confirmation of conjugated linoleic acid geometric isomers by capillary gas chromatography-Fourier transform infrared spectroscopy.. 141–151. 5 indexed citations
13.
14.
Calvey, Elizabeth M., John A. G. Roach, & Eric Block. (1994). Supercritical Fluid Chromatography of Garlic (Allium sativum) Extracts with Mass Spectrometric Identification of Allicin. Journal of Chromatographic Science. 32(3). 93–96. 21 indexed citations
15.
Shaw, G. John, Denis Andrzejewski, John A. G. Roach, & James A. Sphon. (1989). Separation and identification of glucosinolates from Brassica vegetables using high-performance capillary gas chromatography (GC)-positive-ion chemical ionization mass spectrometry (PICIMS) and GC-PICIMS/MS. Journal of Agricultural and Food Chemistry. 37(2). 372–378. 10 indexed citations
16.
Brumley, William C., et al.. (1982). Negative ion chemical ionization mass spectrometry of trichothecenes: Novel fragmentation under OH− conditions. Journal of Mass Spectrometry. 9(10). 451–458. 15 indexed citations
17.
Smith, Audrey Culver, et al.. (1979). Separation and quantitation of 3,3′,4,4′-tetrachlorobiphenyl and 3,3′,4,4′,5,5′-hexachlorobiphenyl in aroclors using florisil column chromatography and gas-liquid chromatography. Bulletin of Environmental Contamination and Toxicology. 23(1). 51–56. 22 indexed citations
18.
Breder, Charles V, et al.. (1978). Headspace sampling and gas-solid chromatographic determination and confirmation of greater than or equal to 1 ppb vinyl chloride residues in polyvinyl chloride food packaging.. Munich Personal RePEc Archive (Ludwig Maximilian University of Munich). 61(4). 813–9. 4 indexed citations
19.
Yurawecz, M. P. & John A. G. Roach. (1978). Gas-Liquid Chromatographic Determination of Chlorinated Norbornene Derivatives in Fish. Journal of AOAC INTERNATIONAL. 61(1). 26–31. 4 indexed citations
20.
Roach, John A. G., et al.. (1976). Excretion of Hydroxylated Polychlorinated Biphenyl Metabolites in Cows’ Milk. Journal of AOAC INTERNATIONAL. 59(2). 273–277. 4 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Jan Fritsche Breakdown of academic impact, for papers by Gerardo Palla Breakdown of academic impact, for papers by Franz Ulberth Breakdown of academic impact, for papers by Margarida A. Ferreira Breakdown of academic impact, for papers by R. Codony Breakdown of academic impact, for papers by Jan Velı́šek Breakdown of academic impact, for papers by William Craig Byrdwell Breakdown of academic impact, for papers by Jacques Vervoort Breakdown of academic impact, for papers by Gerhard Sontag Breakdown of academic impact, for papers by R. A. Barford
Rankless by CCL
2026