title: Recent developments of proton-transfer reaction mass spectrometry (PTR-MS) and its applications in medical research.
abstract: Proton-transfer reaction mass spectrometry (PTR-MS) allows for real-time, on-line determination of absolute concentrations of volatile organic compounds (VOCs) with a high sensitivity and low detection limits (in the pptv range). The technique utilizes H₃O⁺ ions for proton-transfer reactions with many common VOCs while having little to no reaction with any constituents commonly present in air. Over the past decades, research has greatly improved the applications and instrumental design of PTR-MS. In this article, we give an overview of the development of PTR-MS in recent years and its application in medical research. The theory of PTR-MS and various methods for discriminating isobaric VOCs are also described. We also show several specialized designs of sample inlet system, some of those may make PTR-MS suitable for the detection of aqueous solution and/or non-volatile samples.
authors.affiliation: Research Center of Analytical Instrumentation, Analytical & Testing Center, College of Chemistry, Sichuan University, Chengdu, China.
authors.forename: Xuefang
authors.initials: X
authors.lastname: Zhan
authors.forename: Jiana
authors.initials: J
authors.lastname: Duan
authors.forename: Yixiang
authors.initials: Y
authors.lastname: Duan
mesh_terms: D000818:Animals; D035843:Biomedical Research / Q000379:methods; D001944:Breath Tests; D006801:Humans; D013058:Mass Spectrometry / Q000295:instrumentation; D009861:Onium Compounds / Q000737:chemistry; D055549:Volatile Organic Compounds / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism
chemical_list: D009861:Onium Compounds; D055549:Volatile Organic Compounds; C027727:hydronium ion