| Title: | "Identification and Quantitative Analysis of 2-Methyl-4-propyl-1,3-oxathiane in Wine" |
| Author(s): | Chen L; Capone DL; Jeffery DW; |
| Address: | "Department of Wine and Food Science , The University of Adelaide (UA) , PMB 1 , Glen Osmond , South Australia 5064 , Australia. The Australian Wine Research Institute (AWRI) , P.O. Box 197, Glen Osmond , South Australia 5064 , Australia" |
| ISSN/ISBN: | 1520-5118 (Electronic) 0021-8561 (Linking) |
| Abstract: | "On the basis of the chemistry of wine and the co-occurrence of 3-sulfanylhexan-1-ol (3-SH) and acetaldehyde, we investigated the existence of 2-methyl-4-propyl-1,3-oxathiane (1) and identified the presence of a single detectable geometric isomer, cis-1, in wines for the first time. A stable isotope dilution assay (SIDA) using headspace-solid-phase microextraction (HS-SPME) and gas chromatography-mass spectrometry (GC-MS) was developed and validated, and used to quantitate cis-1 in a survey of wines, revealing a range from undetectable (limit of detection = 2.6 ng/L) to 460 ng/L. The odor detection threshold of 1 (using a standard comprising 85% cis-1 and 15% trans-1) in neutral white wine was determined to be 7.1 mug/L. Despite cis-1 not appearing above the determined sensory threshold in the studied wines, the findings demonstrated the presence of a new volatile sulfur compound with a strong correlation to 3-SH concentration ( r = 0.72), showing that cis-1 has potential implications for the fate of the important wine aroma compound 3-SH" |
| Keywords: | Acetaldehyde/chemistry Calibration Gas Chromatography-Mass Spectrometry/methods Hexanols/chemistry Isomerism Limit of Detection Odorants/*analysis Solid Phase Microextraction/methods Sulfhydryl Compounds/chemistry Sulfur/analysis Volatile Organic Compound; |
| Notes: | "MedlineChen, Liang Capone, Dimitra L Jeffery, David W eng 2018/10/06 J Agric Food Chem. 2018 Oct 17; 66(41):10808-10815. doi: 10.1021/acs.jafc.8b04027. Epub 2018 Oct 5" |
