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Author(s): Guillaume L. Erny
Tanize Acunha
Carolina Simó
Alejandro Cifuentes
Arminda Alves
Title: Background correction in separation techniques hyphenated to high-resolution mass spectrometry - Thorough correction with MS scans recorded as profile spectra
Issue Date: 2017
Abstract: Separation techniques hyphenated with high-resolution mass spectrometry have been a true revolutionin analytical separation techniques. Such instruments not only provide unmatched resolution, but theyalso allow measuring the peaks accurate masses that permit identifying monoisotopic formulae. However, data files can be large, with a major contribution from background noise and background ions.Such unnecessary contribution to the overall signal can hide important features as well as decrease theaccuracy of the centroid determination, especially with minor features. Thus, noise and baseline correction can be a valuable pre-processing step. The methodology that is described here, unlike any otherapproach, is used to correct the original dataset with the MS scans recorded as profiles spectrum. Usingurine metabolic studies as examples, we demonstrate that this thorough correction reduces the datacomplexity by more than 90%. Such correction not only permits an improved visualisation of secondarypeaks in the chromatographic domain, but it also facilitates the complete assignment of each MS scanwhich is invaluable to detect possible comigration/coeluting species.
Subject: Química analitica, Química
Analytical chemestry, Chemical sciences
Scientific areas: Ciências exactas e naturais::Química
Natural sciences::Chemical sciences
Related Information: info:eu-repo/grantAgreement/Comissão de Coordenação e Desenvolvimento Regional do Norte/P2020|Norte2020-Projetos Integrados ICDT/NORTE-01-0145-FEDER-000005/LEPABE-2-ECO-INNOVATION/LEPABE-2-ECO-INNOVATION
info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projetos Estratégicos/UID/EQU/00511/2013 - POCI-01-0145-FEDER-006939/Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia/LEPABE
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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