title: Differentiation Using Microwave Plasma Torch Desorption Mass Spectrometry of Navel Oranges Cultivated in Neighboring Habitats.
abstract: The molecular fingerprinting of intact fruit samples combined with statistical data analysis can allow the assessment of fruit quality and location of origin. Herein, microwave plasma torch desorption ionization mass spectrometry (MPT-MS) was applied to produce molecular fingerprints for the juice sac and exocarp of navel oranges cultivated in three closely located habitats, and the mass spectrometric fingerprints were differentiated by principal component analysis (PCA). Because of the relatively high temperature and high ionization efficiency of MPT, the volatile aroma compounds and semivolatile chemicals in the navel oranges were sensitively detected and confidently identified by collision induced dissociation (CID). The limit of detection (LOD) of MPT-MS for vanillin was 0.119 μg/L, with the relative standard deviation (RSD, n = 10) of 1.7%. The results showed that MPT-MS could be a powerful analytical platform for the sensitive molecular analysis of fruits at molecular level with high chemical specificity, allowing differentiation between the same sorts grown in neighboring habitats.
authors.affiliation: Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China University of Technology , Nanchang 330013, People's Republic of China.
authors.forename: Xinchen
authors.initials: X
authors.lastname: Wang
authors.affiliation: Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China University of Technology , Nanchang 330013, People's Republic of China.
authors.forename: Meiling
authors.initials: M
authors.lastname: Yang
authors.affiliation: Nanchang County the First Secondary School in Liantang , Nanchang 330046, People's Republic of China.
authors.forename: Zhiyuan
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China University of Technology , Nanchang 330013, People's Republic of China.
authors.forename: Hua
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China University of Technology , Nanchang 330013, People's Republic of China.
authors.forename: Guofeng
authors.initials: G
authors.lastname: Wang
authors.affiliation: School of Life Sciences, Nanchang University , Nanchang 330031, People's Republic of China.
authors.forename: Min
authors.initials: M
authors.lastname: Deng
authors.affiliation: Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China University of Technology , Nanchang 330013, People's Republic of China.
authors.forename: Huanwen
authors.initials: H
authors.lastname: Chen
authors.affiliation: School of Life Sciences, Nanchang University , Nanchang 330031, People's Republic of China.
authors.forename: Liping
authors.identifier: http://orcid.org/0000-0002-6510-8421
authors.initials: L
authors.lastname: Luo
mesh_terms: D032084:Citrus sinensis / Q000737:chemistry* / Q000145:classification / Q000528:radiation effects; D016002:Discriminant Analysis; D017753:Ecosystem; D005638:Fruit / Q000737:chemistry* / Q000528:radiation effects; D013058:Mass Spectrometry / Q000295:instrumentation / Q000379:methods*; D008872:Microwaves
keywords: ambient mass spectrometry; desorption ionization; microwave plasma torch; navel orange; principal component analysis