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Simultaneous Measurement of Key Odorants at their Sensory Thresholds in Juice Grapes

Author
Bates, Terry
Abstract
Methyl anthranilate (MA), ortho-aminoacetophenone (o-AAP), and furaneol contribute to the characteristic “native grape” and “cotton candy” aromas of Vitis labruscana grapes and their hybrids, e.g. ‘Concord’ and ‘Niagara’. Convenient measurement of these compounds is of interest to grape breeders who wish to either increase or decrease their concentrations in grape varieties. Previous approaches for measurement of these odorants either cannot measure all compounds in a single analysis, or else have detection limits above the sensory thresholds for the odorants (low µg/L). We evaluated the use of an optimized reverse phase solid phase extraction (SPE) approach prior to selected ion monitoring (SIM) GC-MS to achieve low µg/L detection limits for MA, o-AAP, and furaneol in a single analysis.
Date Issued
2019-05-30Subject
gas chromatography mass spectrometry; methyl anthranilate; ortho-aminoacetophenone; Solid phase extraction; Analytical chemistry; Chemistry; furaneol
Committee Chair
Sacks, Gavin Lavi
Committee Member
Cadle-Davidson, Lance E.; Nugen, Sam Rasmussen
Degree Discipline
Chemistry and Chemical Biology
Degree Name
M.S., Chemistry and Chemical Biology
Degree Level
Master of Science
Type
dissertation or thesis