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

Tracey E Siebert; Alice Barker; Sheridan R Barter; Miguel A de Barros Lopes; Markus J Herderich; I Leigh Francis

doi:10.1016/j.foodchem.2018.02.094

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

Food Chem. 2018 Aug 1:256:85-90. doi: 10.1016/j.foodchem.2018.02.094. Epub 2018 Feb 17.

Authors

Tracey E Siebert¹, Alice Barker², Sheridan R Barter², Miguel A de Barros Lopes³, Markus J Herderich², I Leigh Francis⁴

Affiliations

¹ 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. Electronic address: tracey.siebert@awri.com.au.
² The Australian Wine Research Institute, PO Box 197, Glen Osmond (Adelaide), SA 5064, Australia.
³ University of South Australia, School of Pharmacy and Medical Science, GPO Box 2471, Adelaide, SA 5001, Australia.
⁴ 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.

PMID: 29606476
DOI: 10.1016/j.foodchem.2018.02.094

Abstract

(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.

Keywords: (Z)-6-Dodeceno-γ-lactone; (Z)-6-Dodeceno-γ-lactone (PubChem CID: 5352428); (Z)-Dairy lactone; Analysis; Aroma; GC-MS/MS; Wine.

MeSH terms

Gas Chromatography-Mass Spectrometry
Indicator Dilution Techniques
Lactones / analysis*
Lactones / isolation & purification
Limit of Detection
Odorants / analysis
Solid Phase Microextraction
Wine / analysis*

Substances

Lactones