Analysis, potency and occurrence of (Z)-6-dodeceno-γ-lactone in white wine.

Food Chem

The Australian Wine Research Institute, PO Box 197, Glen Osmond (Adelaide), SA 5064, Australia; University of South Australia, School of Pharmacy and Medical Science, GPO Box 2471, Adelaide, SA 5001, Australia.

Published: August 2018

(Z)-6-Dodeceno-γ-lactone is a potent aroma compound that has been little studied and its prevalence in wines is unknown. An efficient stable isotope dilution assay was developed using a simple, direct immersion solid-phase microextraction and gas chromatography-tandem mass spectrometry method suitable for routine use with a low ng/L limit of quantitation. Using this method, 99 out of 104 young white wines analysed were found to contain detectable (Z)-6-dodeceno-γ-lactone. The highest concentrations were found in Riesling and Viognier wines. (Z)-6-Dodeceno-γ-lactone was found to have an aroma detection threshold of 700 ng/L in a neutral white wine. This study established that (Z)-6-dodeceno-γ-lactone is widely present in Australia's most popular white wine varieties, but generally at concentrations below its aroma detection threshold.

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http://dx.doi.org/10.1016/j.foodchem.2018.02.094DOI Listing

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