Title: Rapid fingerprinting of grape volatile composition using secondary electrospray ionization orbitrap mass spectrometry : a preliminary study of grape ripening
Authors : Farrell, Ross R.
Fahrentrapp, Johannes
García-Gómez, Diego
Martinez-Lozano Sinues, Pablo
Zenobi, Renato
Published in : Food Control
Volume(Issue) : 81
Pages : 107
Pages to: 122
Publisher / Ed. Institution : Pergamon Press
Issue Date: Nov-2017
License (according to publishing contract) : Licence according to publishing contract
Type of review: 
Language : English
Subjects : IUNR; Wein
Subject (DDC) : 634: Orchards, fruits and forestry
Abstract: We present a rapid and sensitive method based on secondary electrospray ionization mass spectrometry (SESI-MS) for profiling volatile emissions from the intact berries of non-Muscat grape cultivars (Pinot Noir, Chardonnay and Sauvignon Blanc). The method does not require sample preparation or concentration steps. Grape volatiles were tentatively identified based on accurate mass, the related elemental composition and literature. Approximately 300 peaks were detected in positive ion mode, and fewer (70–100) in negative ion mode. We monitored changes in grape berry volatile composition during ripening to screen for potential ripeness markers and observed ten [M+H]+ peaks and two [M-H]- peaks that evolved in a significant linear trend (R2 ≥ 0.80, p < 0.05) for the combined data across all cultivars either increasing or decreasing in the final four weeks of ripening. Peaks assigned to C13-norisoprenoids and benzenoid derivatives have shown similar trends in previous studies using offline gas chromatography (GC) approaches. Principal components analysis showed that negative ion mode clearly separated each stage of grape ripeness, whilst positive ion mode only separated berries in the final stage, pre-harvest. From this preliminary study, we conclude that SESI-MS holds promise as a tool for rapid screening of grape volatiles. Some marker ions had no interfering peaks within a 1-Da window, such that they could be monitored with simple unit-resolution instruments in future studies. This implies that SESI-MS in combination with portable MS instrumentation has potential for field analysis where real-time analysis is key.
Departement: Life Sciences und Facility Management
Organisational Unit: Institute of Natural Resource Sciences (IUNR)
Publication type: Article in scientific Journal
DOI : 10.1016/j.foodcont.2017.04.041
ISSN: 0956-7135
URI: https://digitalcollection.zhaw.ch/handle/11475/4069
Appears in Collections:Publikationen Life Sciences und Facility Management

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