SIFT-MS quantification of several breath biomarkers of inflammatory bowel disease, IBD: A detailed study of the ion chemistry

•Inflammatory bowel diseases (IBD) are chronic relapsing disorders of the gastrointestinal tract.•The current diagnostic methods are either invasive or have limited sensitivity or specificity.•Identification of new and sensitive non-invasive markers in IBD is highly desirable.•SIFT-MS can be used for quantification of vapours of methylpentane, 1,3,5-triazine, trans-2-octene, cis-2-nonen-1-ol, 2′-methylacetophenone, 1-heptene and 2-hexanon in exhaled breath.•The primary envisaged area of application is the assessment of the value of breath concentrations for clinical diagnosis of IBD.