Letertre, MarineMarineLetertreMunjoma, Nyasha CNyasha CMunjomaSlade, Susan ESusan ESladePlumb, Robert SRobert SPlumbSwann, JonJonSwannCoen, MuireannMuireannCoenNicholson, Jeremy KJeremy KNicholsonWilson, Ian DIan DWilson2020-09-042020-09-042020-07-01Chromatographia, 2020, 83, pp.853-8610009-5893http://hdl.handle.net/10044/1/82149A rapid reversed-phase gradient method employing a 50 mm × 1 mm i.d., C18 microbore column, combined with ion mobility and high-resolution mass spectrometry, was applied to the metabolic phenotyping of urine samples obtained from rats receiving different diets. This method was directly compared to a “conventional” method employing a 150 × 2.1 mm i.d. column packed with the same C18 bonded phase using the same samples. Multivariate statistical analysis of the resulting data showed similar class discrimination for both microbore and conventional methods, despite the detection of fewer mass/retention time features by the former. Multivariate statistical analysis highlighted a number of ions that represented diet-specific markers in the samples. Several of these were then identified using the combination of mass, ion-mobility-derived collision cross section and retention time including N-acetylglutamate, urocanic acid, and xanthurenic acid. Kynurenic acid was tentatively identified based on mass and ion mobility data.© The Author(s) 2020. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.Science & TechnologyLife Sciences & BiomedicinePhysical SciencesBiochemical Research MethodsChemistry, AnalyticalBiochemistry & Molecular BiologyChemistryMicrobore columnsIon mobilityMetabolite identificationMetabolic phenotypingMOBILITY-MASS-SPECTROMETRYHPLC-MSPREDICTIONAnalytical Chemistry0301 Analytical Chemistry0399 Other Chemical SciencesJournal Articlehttps://www.dx.doi.org/10.1007/s10337-020-03900-41612-1112