Qualitative characteristics and comparison of volatile fraction of vodkas made from different botanical materials by comprehensive two-dimensional gas chromatography and the electronic nose based on the technology of ultra-fast gas chromatography

2016 ◽  
Vol 97 (4) ◽  
pp. 1316-1325 ◽  
Author(s):  
Paulina Wiśniewska ◽  
Magdalena Śliwińska ◽  
Tomasz Dymerski ◽  
Waldemar Wardencki ◽  
Jacek Namieśnik
Keyword(s):  
Gas Chromatography ◽  
Electronic Nose ◽  
Volatile Fraction ◽  
Two Dimensional ◽  
Fast Gas Chromatography ◽  
Qualitative Characteristics

scholarly journals Comparison of an Electronic Nose Based on Ultrafast Gas Chromatography, Comprehensive Two-Dimensional Gas Chromatography, and Sensory Evaluation for an Analysis of Type of Whisky

2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Paulina Wiśniewska ◽  
Magdalena Śliwińska ◽  
Tomasz Dymerski ◽  
Waldemar Wardencki ◽  
Jacek Namieśnik
Keyword(s):  
Gas Chromatography ◽  
Sensory Evaluation ◽  
Electronic Nose ◽  
Quality Evaluation ◽  
Consumer Preferences ◽  
Function Analysis ◽  
Alcoholic Beverages ◽  
Two Dimensional ◽  
The Usa ◽  
Fast Gc

Whisky is one of the most popular alcoholic beverages. There are many types of whisky, for example, Scotch, Irish, and American whisky (called bourbon). The whisky market is highly diversified, and, because of this, it is important to have a method which would enable rapid quality evaluation and authentication of the type of whisky. The aim of this work was to compare 3 methods: an electronic nose based on the technology of ultrafast gas chromatography (Fast-GC), comprehensive two-dimensional gas chromatography (GC × GC), and sensory evaluation. The selected whisky brands included 6 blended whiskies from Scotland, 4 blended whiskies from Ireland, and 4 bourbons produced in the USA. For data analysis, peak heights of chromatograms were used. The panelists who took part in sensory evaluations included 4 women and 4 men. The obtained data were analyzed by 2 chemometric methods: partial least squares discriminant analysis (PLS-DA) and discrimination function analysis (DFA). E-nose and GC × GC allowed for differentiation between whiskies by type. Sensory analysis did not allow for differentiation between whiskies by type, but it allowed giving consumer preferences.

Differentiation of chill-stored and frozen pork necks using electronic nose with ultra-fast gas chromatography

2017 ◽  
Vol 40 (5) ◽  
pp. e12540 ◽  
Author(s):  
Elżbieta Górska-Horczyczak ◽  
Iwona Wojtasik-Kalinowska ◽  
Dominika Guzek ◽  
Da-Wen Sun ◽  
Agnieszka Wierzbicka
Keyword(s):  
Gas Chromatography ◽  
Electronic Nose ◽  
Fast Gas Chromatography

scholarly journals Unraveling the acetals as ageing markers of Chinese Highland Qingke Baijiu using comprehensive two-dimensional gas chromatography–time-of-flight mass spectrometry combined with metabolomics approach

2021 ◽  
Vol 5 ◽  
Author(s):  
Wang Xinlei ◽  
Song Xuebo ◽  
Zhu Lin ◽  
Geng Xiaojie ◽  
Zheng Fuping ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Time Of Flight ◽  
Untargeted Metabolomics ◽  
Volatile Fraction ◽  
Reference Scenario ◽  
Two Dimensional ◽  
Targeted Metabolomics ◽  
Flight Mass Spectrometry ◽  
Liquid Liquid Extraction

Abstract Objectives The ageing process has a significant impact on the aroma of Chinese Baijiu, which could strengthen the desirable flavor characteristics and reduce the undesirable ones. The aim of this study was to observe the initiation of meaningful changes in volatile fraction and locate the ageing markers during ageing storage of Chinese Highland Qingke Baijiu. Materials and Methods Samples of Chinese Qingke Baijiu were aged for 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and 11 months before analysis. The samples were isolated by liquid–liquid extraction and then analyzed by comprehensive two-dimensional gas chromatography–time-of-flight mass spectrometry. The acquired data were processed by untargeted and targeted metabolomics approach to locate the ageing markers. Results The untargeted metabolomics analysis (hierarchical clustering analysis, HCA) shows that the chemical composition of Qingke Baijiu presents a statistically significant deviation from the reference scenario after 5 months. Subsequently, supervised statistics analysis (orthogonal partial least squares discrimination analysis) was performed to locate the markers, which changed significantly during ageing. Fifteen markers were located, and seven of them were acetals. Notably, 1,1-diethoxy-propane, 1,1-diethoxy-butane, and 1,1-diethoxy-3-methyl-butane are important contributors to the flavor of Chinese Baijiu. The identified markers were applied for the untargeted metabolomics (HCA), and the results revealed that these markers could divide the Qingke Baijiu into two ageing stages, 0–5 months and 6–11 months. Conclusion The results suggest that it is a valuable tool for monitoring the changes of volatile compounds and locating the age markers in Chinese Baijiu.

scholarly journals Poultry meat freshness evaluation using electronic nose technology and ultra-fast gas chromatography

2017 ◽  
Vol 148 (9) ◽  
pp. 1631-1637 ◽  
Author(s):  
Wojciech Wojnowski ◽  
Tomasz Majchrzak ◽  
Tomasz Dymerski ◽  
Jacek Gębicki ◽  
Jacek Namieśnik
Keyword(s):  
Gas Chromatography ◽  
Electronic Nose ◽  
Poultry Meat ◽  
Fast Gas Chromatography ◽  
Electronic Nose Technology

scholarly journals Highly Informative Fingerprinting of Extra-Virgin Olive Oil Volatiles: The Role of High Concentration-Capacity Sampling in Combination with Comprehensive Two-Dimensional Gas Chromatography

Separations ◽  
2019 ◽  
Vol 6 (3) ◽  
pp. 34 ◽  
Author(s):  
Federico Stilo ◽  
Chiara Cordero ◽  
Barbara Sgorbini ◽  
Carlo Bicchi ◽  
Erica Liberto
Keyword(s):  
Gas Chromatography ◽  
Olive Oil ◽  
Solid Phase ◽  
Virgin Olive Oil ◽  
Extra Virgin Olive Oil ◽  
Volatile Fraction ◽  
Relative Distribution ◽  
Two Dimensional ◽  
High Concentration ◽  
Sorptive Extraction

The study explores the complex volatile fraction of extra-virgin olive oil by combining high concentration-capacity headspace approaches with comprehensive two-dimensional gas chromatography, which is coupled with time of flight mass spectrometry. The static headspace techniques in this study are: (a) Solid-phase microextraction, with multi-polymer coating (SPME- Divinylbenzene/Carboxen/Polydimethylsiloxane), which is taken as the reference technique; (b) headspace sorptive extraction (HSSE) with either a single-material coating (polydimethylsiloxane—PDMS) or a dual-phase coating that combines PDMS/Carbopack and PDMS/EG (ethyleneglycol); (c) monolithic material sorptive extraction (MMSE), using octa-decyl silica combined with graphite carbon (ODS/CB); and dynamic headspace (d) with either PDMS foam, operating in partition mode, or Tenax TA™, operating in adsorption mode. The coverage of both targeted and untargeted 2D-peak-region features, which corresponds to detectable analytes, was examined, while concentration factors (CF) for a selection of informative analytes, including key-odorants and off-odors, and homolog-series relative ratios were calculated and the information capacity was discussed. The results highlighted the differences in concentration capacities, which were mainly caused by polymer-accumulation characteristics (sorptive/adsorptive materials) and its amount. The relative concentration capacity for homologues and potent odorants was also discussed, while headspace linearity and the relative distribution of analytes, as a function of different sampling amounts, was examined. This last point is of particular interest in quantitative studies where accurate data is needed to derive consistent conclusions.

Sign in / Sign up

Export Citation Format

Share Document