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ARS Home » Northeast Area » Wyndmoor, Pennsylvania » Eastern Regional Research Center » Microbial and Chemical Food Safety » People & Locations » Alan Lightfield
Alan Lightfield
Microbial and Chemical Food Safety
Chemist

Phone: (215) 233-6768
Fax:

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Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Comparison of filter membranes in the analysis of 183 veterinary and other drugs by liquid chromatography-tandem mass spectrometry Reprint Icon - (Peer Reviewed Journal)
Michlig, N., Lehotay, S.J., Lightfield, A.R. 2024. Comparison of filter membranes in the analysis of 183 veterinary and other drugs by liquid chromatography-tandem mass spectrometry. Journal of Separation Science. 47:2300696. https://doi.org/10.1002/jssc.202300696.
Stability study of selected veterinary drug residues spiked into extracts from different food commodities Reprint Icon - (Peer Reviewed Journal)
Lehotay, S.J., Le Floch, M., Lightfield, A.R., Couëdor, P., Hurtaud-Pessel, D., Michlig, N., Verdon, E. 2023. Stability study of selected veterinary drug residues spiked into extracts from different food commodities. Food Additives & Contaminants. Part A: Chemistry, Analysis, Control, Exposure & Risk Assessment. 40:1198-1217. https://doi.org/10.1080/19440049.2023.2240444.
Linking soil health to human health: Arbuscular mycorrhizae play a key role in plant uptake of the antioxidant ergothioneine from soils Reprint Icon - (Peer Reviewed Journal)
Carrara, J.E., Lehotay, S.J., Lightfield, A.R., Sun, D., Richie Jr., J.P., Smith, A.H., Heller, W. 2023. Linking soil health to human health: Arbuscular mycorrhizae play a key role in plant uptake of the antioxidant ergothioneine from soils. Plants, People, Planet. 5:449-458. https://doi.org/10.1002/ppp3.10365.
Analysis of pesticides, veterinary drugs, and environmental contaminants in goat and lamb by the QuEChERSER mega-method Reprint Icon - (Peer Reviewed Journal)
Ninga, E., Lehotay, S.J., Sapozhnikova, Y.V., Lightfield, A.R., Strahan, G.D., Monteiro, S.H. 2022. Analysis of pesticides, veterinary drugs, and environmental contaminants in goat and lamb by the QuEChERSER mega-method. Analytical Methods. 14:2761-2770. https://doi.org/10.1039/D2AY00713D.
Validation of the QuEChERSER mega-method for the analysis of pesticides, veterinary drugs, and environmental contaminants in tilapia (Oreochromis Niloticus) Reprint Icon - (Peer Reviewed Journal)
Monteiro, S.H., Lehotay, S.J., Sapozhnikova, Y.V., Ninga, E., Moura Andrade, G.C., Lightfield, A.R. 2022. Validation of the QuEChERSER mega-method for the analysis of pesticides, veterinary drugs, and environmental contaminants in tilapia (Oreochromis Niloticus). Food Additives & Contaminants. Part A. 39:699-709. https://doi.org/10.1080/19440049.2021.2020911.
Validation of a high-throughput method for analysis of pesticide residues in hemp and hemp products Reprint Icon - (Peer Reviewed Journal)
Michlig, N., Lehotay, S.J., Lightfield, A.R., Beldomenico, H., Repetti, M.R. 2021. Validation of a high-throughput method for analysis of pesticide residues in hemp and hemp products. Journal of Chromatography A. 1645:462097. https://doi.org/10.1016/j.chroma.2021.462097.
Comparison of four different multiclass, multiresidue sample preparation methods in the analysis of veterinary drugs in fish and other food matrices Reprint Icon - (Peer Reviewed Journal)
Lehotay, S.J., Lightfield, A.R. 2021. Comparison of four different multiclass, multiresidue sample preparation methods in the analysis of veterinary drugs in fish and other food matrices. Analytical and Bioanalytical Chemistry. 413:3223–3241. https://doi.org/10.1007/s00216-021-03259-x.
High-throughput mega-method for the analysis of pesticides, veterinary drugs, and environmental contaminants by UHPLC-MS/MS and robotic mini-SPE cleanup + LPGC-MS/MS. Part 2: Catfish Reprint Icon - (Peer Reviewed Journal)
Ninga, E., Sapozhnikova, Y.V., Lehotay, S.J., Lightfield, A.R., Monteiro, S. 2020. High-throughput mega-method for the analysis of pesticides, veterinary drugs, and environmental contaminants by ultra-high-performance liquid chromatography-tandem mass spectrometry and robotic mini-solid-phase extraction cleanup + low-pressure gas chromatography-tandem mass spectrometry, Part 2: Catfish. Journal of Agricultural and Food Chemistry. 69:1169-1174. https://doi.org/10.1021/acs.jafc.0c00995.
High-throughput mega-method for analysis of pesticides, veterinary drugs, and environmental contaminants by ultra-high-performance LC-TMS and robotic mini-solid-phase extraction cleanup + low-pressure GC-TMS, Part 1: Beef Reprint Icon - (Peer Reviewed Journal)
Monteiro, S.H., Lehotay, S.J., Sapozhnikova, Y.V., Ninga, E., Lightfield, A.R. 2020. High-throughput mega-method for the analysis of pesticides, veterinary drugs, and environmental contaminants by ultra-high-performance liquid chromatography-tandem mass spectrometry and robotic mini-solid-phase extraction cleanup + low-pressure gas chromatography-tandem mass spectrometry, Part 1: Beef. Journal of Agricultural and Food Chemistry. 69:1169-1174. https://doi.org/10.1021/acs.jafc.0c00710?ref=pdf
Assessment of test portion sizes after sample comminution with liquid nitrogen in the high-throughput analysis of pesticide residues in fruits and vegetables Reprint Icon - (Peer Reviewed Journal)
Lehotay, S.J., Michlig, N., Lightfield, A.R. 2020. Assessment of test portion sizes after sample comminution with liquid nitrogen in the high-throughput analysis of pesticide residues in fruits and vegetables. Journal of Agricultural and Food Chemistry. 68:1468-1479. https://doi.org/10.1021/acs.jafc.9b07685.
Extract-and-inject analysis of veterinary drug residues in catfish and ready-to-eat meats by ultrahigh-performance liquid chromatography – tandem mass spectrometry Reprint Icon - (Peer Reviewed Journal)
Lehotay, S.J., Lightfield, A.R. 2020. Extract-and-inject analysis of veterinary drug residues in catfish and ready-to-eat meats by ultrahigh-performance liquid chromatography – tandem mass spectrometry. Journal of AOAC International. 103(2): 584-606. https://doi.org/10.1093/jaoacint/qsz036.
Simultaneous analysis of aminoglycosides with many other classes of drug residues in bovine tissues by ultra high-performance liquid chromatography-tandem mass spectrometry using an ion-pairing reagent added to final extracts - (Peer Reviewed Journal)
Lehotay, S.J., Lightfield, A.R. 2018. Simultaneous analysis of aminoglycosides with many other classes of drug residues in bovine tissues by ultra high-performance liquid chromatography-tandem mass spectrometry using an ion-pairing reagent added to final extracts. Analytical and Bioanalytical Chemistry. 410:195-1109.
Structural characterization of product ions of regulated veterinary drugs by electrospray ionization and quadrupole time-of-flight mass spectrometry (part 3) Anthelmintics, thyreostats, and flukicides - (Peer Reviewed Journal)
Nunez, A., Lehotay, S.J., Lightfield, A.R. 2016. Structural characterization of product ions of regulated veterinary drugs by electrospray ionization and quadrupole time-of-flight mass spectrometry (part 3) Anthelmintics, thyreostats, and flukicides. Journal of Rapid Communications in Mass Spectroscopy. 30:813-822.
Validation of a streamlined multiclass, multiresidue method for determination of veterinary drug residues in bovine muscle by liquid chromatography-tandem mass spectrometry Reprint Icon - (Peer Reviewed Journal)
Schneider, M.J., Lehotay, S.J., Lightfield, A.R. 2014. Validation of a streamlined multiclass, multiresidue method for determination of veterinary drug residues in bovine muscle by liquid chromatography-tandem mass spectrometry. Analytical and Bioanalytical Chemistry. DOI:10.1007/s00216-014-8386-3.
Structural characterization of fragment ions by electrospray ionization and Q-TOF mass spectrometry to support regulatory analysis of veterinary drug residues in foods Reprint Icon - (Peer Reviewed Journal)
Nunez, A., Geis-Asteggiante, L., Lehotay, S.J., Lightfield, A.R. 2014. Structural characterization of fragment ions by electrospray ionization and Q-TOF mass spectrometry to support regulatory analysis of veterinary drug residues in foods. Rapid Communications in Mass Spectrometry. 28(10):1061-1081.
Rapid analysis of aminoglycoside antibiotics in bovine tissues using disposable pipette extraction and ultrahigh performance liquid chromatography - tandem mass spectrometry Reprint Icon - (Peer Reviewed Journal)
Lehotay, S.J., Mastovska, K., Lightfield, A.R., Nunez, A., Dutko, T., Ng, C., Bluhm, L. 2013. Rapid analysis of aminoglycoside antibiotics in bovine tissues using disposable pipette extraction and ultrahigh performance liquid chromatography - tandem mass spectrometry. Journal of Chromatography A. 1313:103-112.
Hot study: Investigating the risk for violative meat residues in bob veal calves fed colostrum from cows treated at dry-off with cephapirin benzathine - (Peer Reviewed Journal)
Hausler, K., Godden, S.M., Schneider, M.J., Lightfield, A.R., Bulthaus, M., Haines, D. 2013. Hot study: Investigating the risk for violative meat residues in bob veal calves fed colostrum from cows treated at dry-off with cephapirin benzathine. Journal of Dairy Science. 96(4):2349-2355.
Ruggedness testing and validation of a practical analytical method for > 100 veterinary drug residues in bovine muscle by ultrahigh performance liquid chromatography – tandem mass spectrometry - (Peer Reviewed Journal)
Geis-Asteggiante, L., Lehotay, S.J., Lightfield, A.R., Dutko, T., Ng, C., Bluhm, L. 2012. Ruggedness testing and validation of a practical analytical method for > 100 veterinary drug residues in bovine muscle by ultrahigh performance liquid chromatography – tandem mass spectrometry. Journal of Chromatography A. 1258:43-54.
Evaluation of a multiclass, multiresidue liquid chromatography-tandem mass spectrometry method for analysis of 120 veterinary drugs in bovine kidney - (Peer Reviewed Journal)
Schneider, M.J., Lehotay, S.J., Lightfield, A.R. 2012. Evaluation of a multiclass, multiresidue liquid chromatography-tandem mass spectrometry method for analysis of 120 veterinary drugs in bovine kidney. Drug Testing and Analysis Journal. 4(1):91-102.
Development and validation of a streamlined method designed to detech residues of 62 veterinary drugs in bovine kidney using ultrahigh performance liquid chromatography - tandem mass spectrometry - (Peer Reviewed Journal)
Lehotay, S.J., Lightfield, A.R., Geis-Asteggiante, L., Schneider, M.J., Dutko, T., Ng, C., Bluhm, L., Mastovska, K. 2012. Development and validation of a streamlined method designed to detech residues of 62 veterinary drugs in bovine kidney using ultrahigh performance liquid chromatography - tandem mass spectrometry. Drug Testing and Analysis Journal. 4:75-90.
A multiclass multiresidue LC-MS/MS method for analysis of veterinary drugs in bovine kidney - (Proceedings)
Schneider, M.J., Lehotay, S.J., Lightfield, A.R. 2012. A multiclass multiresidue LC-MS/MS method for analysis of veterinary drugs in bovine kidney. Euroresidue Conference Proceedings. 2:515.
Multi-Analyst, Multi-Matrix Performance of the QuEChERS Approach for Pesticide Residues in Foods and Feeds Using LC-MS/MS Analysis with Different Calibration Techniques - (Peer Reviewed Journal)
Lehotay, S.J., Mastovska, K., Lightfield, A.R., Gates, R.A. 2010. Multi-Analyst, Multi-Matrix Performance of the QuEChERS Approach for Pesticide Residues in Foods and Feeds Using LC-MS/MS Analysis with Different Calibration Techniques. Journal of Association of Official Analytical Chemists International. 93(2):355-367.
Comparison of screening methods for antibiotics in beef kidney juice and serum - (Peer Reviewed Journal)
Schneider, M.J., Mastovska, K., Lehotay, S.J., Lightfield, A.R., Kinsella, B., Shultz, C.2009. Comparison of screening methods for antibiotics in beef kidney juice and serum. Analytica Chimica Acta. 637:290-297.
New Method for the Analysis of Flukicide and Other Anthelmintic Residues in Bovine Milk and Liver using LC-MS/MS - (Peer Reviewed Journal)
Kinsella, B., Lehotay, S.J., Mastovska, K., Lightfield, A.R., Furey, A., Danaher, M. 2009. New Method for the Analysis of Flukicide and Other Anthelmintic Residues in Bovine Milk and Liver using Liquid Chromatography - Tandem Mass Spectrometry. Anal. Chim. Acta. (637):196-207.
Streamlining methodology for the multiresidue analysis of beta-lactam antibiotics in bovine kidney using liquid chromatography-tandem mass spectrometry - (Peer Reviewed Journal)
Mastovska, K., Lightfield, A.R. 2008. Streamlining methodology for the multiresidue analysis of beta-lactam antibiotics in bovine kidney using liquid chromatography-tandem mass spectrometry. Journal of Chromatography A. 1202:118-123.
Reversed phase and aqueous normal phase retention in multiclass LC-MS analysis of antibiotics - (Trade Journal)
Mastovska, K., Lightfield, A.R. 2008. Reversed phase and aqueous normal phase retention in multiclass LC-MS analysis of antibiotics. American Laboratory.
New Method for Analysis of Multiple Anthelmintic Residues in Animal Tissue - (Proceedings)
Kinsella, B., Lehotay, S.J., Lightfield, A.R., Mastovska, K., Furey, A., Danaher, M. 2008. New Method for Analysis of Multiple Anthelmintic Residues in Animal Tissue. Euroresidue Conference Proceedings. p.1147-1152.
A Comparison of the FAST, Premi® and KIS (TradeMark) Tests for Detection of Antibiotics in Beef Kidney Juice and Serum - (Proceedings)
Schneider, M.J., Lehotay, S.J., Mastovska, K., Lightfield, A.R., Kinsella, B., Shultz, C. 2008. A comparison of the fast, premi® and kis (trademark) tests for detection of antibiotics in beef kidney juice and serum. Proceedings of Euroresidue VI - Residues of Veterinary Drugs in Food Conference. p.389-394.
CONFIRMATORY AND QUANTITATIVE ANALYSIS OF B-LACTAM ANTIBIOTICS IN BOVINE KIDNEY TISSUE BY DISPERSIVE SOLID-PHASE EXTRACTION AND LIQUID CHROMATOGRAPHY-TANDEM MASS SPECTROMETRY - (Peer Reviewed Journal)
Fagerquist, C.K., Lightfield, A.R., Lehotay, S.J. 2005. Confirmatory and quantitative analysis of b-lactam antibiotics in bovine kidney tissue by dispersive solid-phase extraction and liquid chromatography-tandem mass spectrometry. Analytical Chemistry 5(77).1473-1482.
USE OF BUFFERING TO IMPROVE RESULTS OF PROBLEMATIC PESTICIDES IN A FAST AND EASY METHOD FOR RESIDUE ANALYSIS OF FRUITS AND VEGETABLES - (Peer Reviewed Journal)
Lehotay, S.J., Mastovska, K., Lightfield, A.R. 2005. Use of buffering to improve results of problematic pesticides in a fast and easy method for residue analysis of fruits and vegetables. Journal of Association of Official Analytical Chemists International. 88.pp. 615-629.
ANALYSIS FOR B-LACTAM ANTIBIOTICS IN KIDNEY TISSUE BY LIQUID CHROMATOGRAPHY WITH ELECTROSPRAY IONIZATION AND SELECTIVE REACTION MONITORING/TANDEM ION TRAP MASS SPECTROMETRY - (Peer Reviewed Journal)
FAGERQUIST, C.K., LIGHTFIELD, A.R. ANALYSIS FOR B-LACTAM ANTIBIOTICS IN KIDNEY TISSUE BY LIQUID CHROMATOGRAPHY WITH ELECTROSPRAY IONIZATION AND SELECTIVE REACTION MONITORING/TANDEM ION TRAP MASS SPECTROMETRY. RAPID COMMUNICATIONS IN MASS SPECTROMETRY. 2003.
APPROACHES AND RECOMMENDATIONS TO VALIDATE MS CONFIRMATION CRITERIA FOR VETERINARY DRUG RESIDUES IN FOOD - (Abstract Only)
LEHOTAY, S.J., SCHNEIDER, M.J., FAGERQUIST, C.K., LIGHTFIELD, A.R. APPROACHES AND RECOMMENDATIONS TO VALIDATE MS CONFIRMATION CRITERIA FOR VETERINARY DRUG RESIDUES IN FOOD. 116TH AOAC INTERNATIONAL ANNUAL MEETING. ABSTRACT. 2002. P. 80.
AN SPE COLUMN/TEFLON SLEEVE ASSEMBLY FOR THE IN-LINE RETENTION DURING SUPERCRITICAL FLUID EXTRACTION OF TRACE LEVEL ANALITIES FROM BIOLOGICAL MATRICES - (Peer Reviewed Journal)