| Title: | Effect of Wine Matrix Composition on the Quantification of Volatile Sulfur Compounds by Headspace Solid-Phase Microextraction-Gas Chromatography-Pulsed Flame Photometric Detection |
| Address: | "Department of Food Science & Technology, Oregon State University, Corvallis, OR 97331, USA. yungdoufu@gmail.com. Department of Food Science & Technology, Oregon State University, Corvallis, OR 97331, USA. Michael.qian@oregonstate.edu. Oregon Wine Research Institute, Oregon State University, Corvallis, OR 97331, USA. Michael.qian@oregonstate.edu" |
| DOI: | 10.3390/molecules24183320 |
| ISSN/ISBN: | 1420-3049 (Electronic) 1420-3049 (Linking) |
| Abstract: | "The analysis of volatile sulfur compounds using headspace solid-phase microextraction (HS-SPME) is heavily influenced by matrix effects. The effects of a wine matrix, both non-volatile and volatile components (other than ethanol) were studied on the analysis of several common sulfur volatiles found in wine, including hydrogen sulfide (H(2)S), methanethiol (MeSH), dimethyl sulfide (DMS), dimethyl disulfide (DMDS), dimethyl trisulfide (DMTS), diethyl disulfide (DEDS), methyl thioacetate (MeSOAc), and ethyl thioacetate (EtSOAc). Varying levels of devolatilized wine and common wine volatiles (acids, esters, alcohols) were added to synthetic wine samples to act as matrices. Sulfur standards were added and analyzed using gas chromatography with pulsed-flame photometric detection (GC-PFPD). Five internal standards were used to find best representatives of each compound despite matrix effects. Sensitivity remained stable with the addition of devolatilized wine, while addition of volatile components decreased sensitivity. DMS was found to be best measured against EMS; DMDS and the thioacetates were best measured against DES; H(2)S, MeSH, DEDS, and DMTS were best measured against DIDS. The method was used to quantitate the volatile sulfur compounds in 21 wines with various ethanol contents and volatile profiles" |
| Keywords: | "Chromatography, Gas/methods Disulfides/analysis Food Analysis/methods Hydrogen Sulfide/analysis Photometry/methods Sensitivity and Specificity Solid Phase Microextraction/*methods Sulfhydryl Compounds/analysis Sulfides/analysis Sulfur Compounds/*analysis/;" |
| Notes: | "MedlineDavis, Peter M Qian, Michael C eng Switzerland 2019/09/25 Molecules. 2019 Sep 12; 24(18):3320. doi: 10.3390/molecules24183320" |
