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Food Res Int

Title:		Light-induced alterations of pineapple (Ananas comosus [L.] Merr.) juice volatiles during accelerated ageing and mass spectrometric studies into their precursors
Author(s):		Steingass CB; Glock MP; Lieb VM; Carle R;
Address:		"Institute of Food Science and Biotechnology, Chair Plant Foodstuff Technology and Analysis, University of Hohenheim, Garbenstrasse 25, 70599 Stuttgart, Germany. Electronic address: christof.steingass@uni-hohenheim.de. Institute of Food Science and Biotechnology, Chair Plant Foodstuff Technology and Analysis, University of Hohenheim, Garbenstrasse 25, 70599 Stuttgart, Germany. Institute of Food Science and Biotechnology, Chair Plant Foodstuff Technology and Analysis, University of Hohenheim, Garbenstrasse 25, 70599 Stuttgart, Germany; Biological Science Department, Faculty of Science, King Abdulaziz University, P.O. Box 80257, Jeddah 21589, Saudi Arabia"
Journal Title:		Food Res Int
Year:		2017
Volume:		20170619
Issue:		Pt 3
Page Number:		366 - 374
DOI:		10.1016/j.foodres.2017.06.030
ISSN/ISBN:		1873-7145 (Electronic) 0963-9969 (Linking)
Abstract:		"Alterations of volatiles during accelerated light-induced ageing of pineapple juice were assessed by HS-SPME-GC-MS in a non-targeted profiling analysis over a 16-week period. Multivariate statistics permitted to reveal substantial chemical markers generally describing the effect of light storage. Volatiles generated comprised phenylpropenes, carbonyls, 2-methylthiophene, toluene, and furfural, while concentrations of methyl and ethyl esters, terpenes, and furanones decreased. In addition, the qualitative composition of phenolic compounds and glycoside-bound volatiles in selected samples was characterized by HPLC-DAD-ESI-MS(n) as well as HR-ESI-MS. The fresh juice contained unique pineapple metabolites such as S-p-coumaryl, S-coniferyl, S-sinapylglutathione, and structurally related derivatives. Among others, the presence of p-coumaroyl, feruloyl, and caffeoylisocitrate as well as three 4-hydroxy-2,5-dimethyl-3(2H)-furanone glycosides in pineapples could be substantiated by the HR-ESI-MS experiment. Mass spectrometric assignments of selected metabolites are presented, and putative linkages between volatiles and their precursors are established"
Keywords:		Ananas/*chemistry/metabolism Food Handling/*methods Fruit and Vegetable Juices/*analysis *Light Mass Spectrometry/*methods Volatile Organic Compounds/analysis/chemistry/*metabolism HDMF precursors High-resolution mass spectrometry Light-induced volatiles;
Notes:		"MedlineSteingass, Christof Bjorn Glock, Mona Pia Lieb, Veronika Maria Carle, Reinhold eng Canada 2017/10/02 Food Res Int. 2017 Oct; 100(Pt 3):366-374. doi: 10.1016/j.foodres.2017.06.030. Epub 2017 Jun 19"