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Alan R. Lightfield
Researcher at United States Department of Agriculture
Publications - 35
Citations - 1584
Alan R. Lightfield is an academic researcher from United States Department of Agriculture. The author has contributed to research in topics: Veterinary drug & Supercritical fluid extraction. The author has an hindex of 17, co-authored 32 publications receiving 1398 citations. Previous affiliations of Alan R. Lightfield include Agricultural Research Service.
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Journal ArticleDOI
Use of Buffering and Other Means to Improve Results of Problematic Pesticides in a Fast and Easy Method for Residue Analysis of Fruits and Vegetables
TL;DR: Independent of the original sample pH, the use of buffering during the extraction yields pH <4 in the MeCN extract and >5 in the water phase, which increases recoveries of both acid- and base-sensitive pesticides.
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New method for the analysis of flukicide and other anthelmintic residues in bovine milk and liver using liquid chromatography–tandem mass spectrometry
Brian Kinsella,Steven J. Lehotay,Katerina Mastovska,Alan R. Lightfield,Ambrose Furey,Martin Danaher +5 more
TL;DR: A liquid chromatographic-tandem mass spectrometric (LC-MS/MS) multi-residue method for the simultaneous quantification and identification of 38 residues of the most widely used anthelmintic veterinary drugs in milk and liver has been developed and validated.
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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
Lucía Geis-Asteggiante,Steven J. Lehotay,Alan R. Lightfield,Terry Dutko,Chilton Ng,Louis Bluhm +5 more
TL;DR: Optimization, extension, and validation of a streamlined, qualitative and quantitative multiclass, multiresidue method to monitor >100 veterinary drug residues in meat using ultrahigh-performance liquid chromatography-tandem mass spectrometry found end-capped C18 and post-column infusion of ammonium formate as an ionization enhancer for the late-eluting anthelmintics were found to give improved qualitative results for greater analytical scope.
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Streamlining methodology for the multiresidue analysis of β-lactam antibiotics in bovine kidney using liquid chromatography–tandem mass spectrometry
TL;DR: A previously reported multiresidue method for the analysis of 11 important beta-lactams in bovine kidney has been further streamlined and methanol has been eliminated from the entire method, including the LC-MS/MS analysis.
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Multi-analyst, multi-matrix performance of the QuEChERS approach for pesticide residues in foods and feeds using HPLC/MS/MS analysis with different calibration techniques.
TL;DR: In this article, three different calibration approaches were applied in HPLC/MS/MS using electrospray ionization for the determination of 14 diverse pesticide residues at different levels in a variety of food matrixes.