title: Identification of volatile components in Chinese Sinkiang fermented camel milk using SAFE, SDE, and HS-SPME-GC/MS.
abstract: The volatile components of Chinese Sinkiang fermented camel milk were isolated by solvent assisted flavour evaporation (SAFE), simultaneous distillation extraction (SDE, dichloromethane and diethyl ether as solvent, respectively) and headspace solid-phase microextraction (HS-SPME, CAR/PDMS, PDMS/DVB and DVB/CAR/PDMS fibre extraction, respectively) and analysed by GC/MS. A total of 133 volatile components were identified under 6 different conditions, including 30 esters, 20 acids, 18 saturated alcohols, 15 unsaturated aliphatic alcohols, 8 saturated ketones, 9 saturated aldehydes, 8 unsaturated aliphatic aldehydes, 6 furans, 5 sulphur-containing compounds, 5 ethers, 5 lactones, 3 other compounds, and 1 unsaturated aliphatic ketone. Three pretreatment methods were compared, assisted by principal component analysis (PCA). The results indicated that the volatile components obtained using different methods varied greatly both in categories and in content, and therefore, a multi-pretreatment method should be adopted together with GC/MS. A total of 71 aroma-active compounds were detected by gas chromatography-olfactometry (GC-O), among which 66 aroma-active compounds were found by SDE (60, dichloromethane as solvent; 24, diethyl ether as solvent), 26 by SAFE.
authors.affiliation: College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, 710021 Xi'an, China.
authors.forename: Li
authors.initials: L
authors.lastname: Ning
authors.affiliation: School of Chemical and Environmental Engineering, Beijing Technology and Business University, 100142 Beijing, China.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Fu-Ping
authors.affiliation: School of Chemical and Environmental Engineering, Beijing Technology and Business University, 100142 Beijing, China.
authors.forename: Chen
authors.initials: C
authors.lastname: Hai-Tao
authors.affiliation: School of Chemical and Environmental Engineering, Beijing Technology and Business University, 100142 Beijing, China.
authors.forename: Liu
authors.initials: L
authors.lastname: Si-Yuan
authors.affiliation: School of Chemical and Environmental Engineering, Beijing Technology and Business University, 100142 Beijing, China.
authors.forename: Gu
authors.initials: G
authors.lastname: Chen
authors.affiliation: School of Chemical and Environmental Engineering, Beijing Technology and Business University, 100142 Beijing, China.
authors.forename: Song
authors.initials: S
authors.lastname: Zhen-Yang
authors.affiliation: College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, 710021 Xi'an, China; School of Chemical and Environmental Engineering, Beijing Technology and Business University, 100142 Beijing, China. Electronic address: Sunbg@btbu.edu.cn.
authors.forename: Sun
authors.initials: S
authors.lastname: Bao-Guo
keywords: Fermented camel milk; GC–O; HS-SPME; PCA; SAFE; SDE; Volatile components