title: Mass spectrometry imaging for visualizing organic analytes in food.
abstract: The demand for rapid chemical imaging of food products steadily increases. Mass spectrometry (MS) is featured by excellent molecular specificity of analysis and is, therefore, a very attractive method for chemical profiling. MS for food imaging has increased significantly over the past decade, aided by the emergence of various ambient ionization techniques that allow direct and rapid analysis in ambient environment. In this article, the current status of food imaging with MSI is reviewed. The described approaches include matrix-assisted laser desorption/ionization (MALDI), but emphasize desorption atmospheric pressure photoionization (DAPPI), electrospray-assisted laser desorption/ionization (ELDI), probe electrospray ionization (PESI), surface desorption atmospheric pressure chemical ionization (SDAPCI), and laser ablation flowing atmospheric pressure afterglow (LA-FAPA). The methods are compared with regard to spatial resolution; analysis speed and time; limit of detection; and technical aspects. The performance of each method is illustrated with the description of a related application. Specific requirements in food imaging are discussed.
authors.affiliation: Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, Department of Applied Chemistry, East China Institute of Technology, Nanchang, 330013, P.R. China.
authors.forename: Eric
authors.initials: E
authors.lastname: Handberg
authors.affiliation: Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, Department of Applied Chemistry, East China Institute of Technology, Nanchang, 330013, P.R. China.
authors.forename: Konstantin
authors.initials: K
authors.lastname: Chingin
authors.affiliation: Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, Department of Applied Chemistry, East China Institute of Technology, Nanchang, 330013, P.R. China.
authors.forename: Nannan
authors.initials: N
authors.lastname: Wang
authors.affiliation: Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, Department of Applied Chemistry, East China Institute of Technology, Nanchang, 330013, P.R. China.
authors.forename: Ximo
authors.initials: X
authors.lastname: Dai
authors.affiliation: Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, Department of Applied Chemistry, East China Institute of Technology, Nanchang, 330013, P.R. China.
authors.forename: Huanwen
authors.initials: H
authors.lastname: Chen
keywords: ambient ionization; antioxidant; chemical imaging; food; food safety; vitamin