Download or read book Applications of Mass Spectrometric Profiling Methods for Grape, Juice, and Wine Analysis written by Joshua Godshaw and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Wine is a complex mixture of ethanol, organic acids, esters, polyphenols, and minerals derived from the fermentation of grapes. The chemical composition of wine is often investigated to assess the flavor, quality, authenticity, and safety characteristics via advanced analytical chemistry techniques. This thesis describes the application of two analytical approaches to the characterization of grapes and wine. The first section compares sample preparation methods for the elemental analysis of wine. It presents the analytical challenge of the wine matrix in multielement analysis by plasma based technologies (ICP-MS) and details the use of different sample pretreatments and standardization techniques to mitigate these challenges, including internal standardization and isotope dilution calibration. Chapters 2-4 focus on the application of an UHPLC-qTOF-MS analytical method to study non-volatile precursors to aroma compounds, specifically monoterpenyl glycosides, in grapes and wine. The first analysis details the expansion and use of a putative compound database and library to study monoterpenyl glycoside composition during grape berry maturation in six different grape cultivars. The next experiment applies the same library and method to track changes in monoterpenyl glycoside composition throughout winemaking from grapes to finished wine. Finally, this method and library are used to compare the impact of a viral grapevine disease, grapevine red blotch virus (GRBV), on the monoterpenyl glycoside profile of diseased and healthy grapes and wines.