Characterization and discrimination of Chinese marinated pork hocks by volatile compound profiling using solid phase microextraction gas chromatography-mass spectrometry/olfactometry, electronic nose and chemometrics
[en] The primary aim of this study was to investigate volatile constituents for the differentiation
of Chinese marinated pork hocks from four local brands, Dahongmen (DHM), Daoxiangcun (DXC), Henghuitong (HHT) and Tianfuhao (TFH). To this end the volatile constituents were evaluated by gas chromatography-mass spectrometry/olfactometry (GC-MS/O), electronic nose (E-nose) and chemometrics. A total of 62 volatile compounds were identified and quantified in all pork hocks, and 24 of them were considered as odour-active compounds because their odour activity values (OAVs) were greater than 1. Hexanal (OAV at 3.6–20.3), octanal (OAV at 30.3–47.5), nonanal (OAV at 68.6–166.3), 1,8-cineole (OAV at 36.4–133.3), anethole (OAV at 5.9–28.3) and 2-pentylfuran (OAV at 3.5–29.7) were the key odour-active compounds contributing to the integral flavour of the marinated pork hocks. According to principal component analysis (PCA) and partial least squares-discriminant analysis (PLS-DA) of GC-MS/O and E-nose data, the results showed that the marinated pork hocks were clearly separated into three groups: DHM, HHT, and DXC-TFH. Nine odour-active compounds, heptanal, nonanal, 3-carene, D-limonene, -phellandrene, p-cymene, eugenol, 2-ethylfuran and 2-pentylfuran, were determined to represent potential flavour markers for the discrimination of marinated pork hocks. This study indicated the feasibility of using GC-MS/O coupled with the E-nose method for the differentiation of the volatile profile in different brands of marinated pork hocks.
Zhang, Chun ; Université de Liège - ULiège > Gembloux Agro-Bio Tech
Li, Juan
Song, Huan-Lu
Fauconnier, Marie-Laure ; Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Chimie des agro-biosystèmes
Tyteca, Eva
Language :
English
Title :
Characterization and discrimination of Chinese marinated pork hocks by volatile compound profiling using solid phase microextraction gas chromatography-mass spectrometry/olfactometry, electronic nose and chemometrics
Publication date :
April 2019
Journal title :
Molecules
eISSN :
1420-3049
Publisher :
Multidisciplinary Digital Publishing Institute (MDPI), Switzerland
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