| Title: | Flavor components detection and discrimination of isomers in Huaguo tea using headspace-gas chromatography-ion mobility spectrometry and multivariate statistical analysis |
| Author(s): | Lu W; Chen J; Li X; Qi Y; Jiang R; |
| Address: | "Key Laboratory of Forensic Science, Ministry of Justice (Academy of Forensic Science), PR China; Key Laboratory of Evidence Identification in Universities of Shandong Province, Shandong University of Political Science and Law, Jinan, 250014, Shandong Province, PR China. Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, Shandong Province, PR China. Key Laboratory of Forensic Science, Ministry of Justice (Academy of Forensic Science), PR China; Key Laboratory of Evidence Identification in Universities of Shandong Province, Shandong University of Political Science and Law, Jinan, 250014, Shandong Province, PR China. Electronic address: lixuebo@sdupsl.edu.cn. Key Laboratory of Evidence Identification in Universities of Shandong Province, Shandong University of Political Science and Law, Jinan, 250014, Shandong Province, PR China" |
| DOI: | 10.1016/j.aca.2023.340842 |
| ISSN/ISBN: | 1873-4324 (Electronic) 0003-2670 (Linking) |
| Abstract: | "Aroma components are one of the crucial factors in dynamic processes analysis, quality control, and origin traceability. Various categories of Huaguo Tea possessed different taste due to the generation of aroma. In this study, a comprehensive analysis of volatiles was conducted for five popular Huaguo Tea samples (Lemon Slices, Bitter Gourd Slices, Citri Reticulatae Pericarpium, Red Lycium Barbarum, and Black Lycium Barbarum) via gas chromatography-ion mobility spectrometry (GC-IMS) combining with multivariate statistical strategies. Comparison analysis was achieved with the properties of visually and intuitively by drawing of topography plots. A total of one hundred and eighty volatiles were distinguished. Aliphatic isomers were identified simultaneously by fingerprint spectra. Alcohols, aldehydes, esters, and ketones were the most abundant volatiles in Huaguo Tea samples. To characterize the Huaguo Tea precisely and establish an analysis model for their classification, multivariate statistical analysis was applied to distinguish different Huaguo Tea. Satisfied discrimination was obtained by principal component analysis (PCA) and orthogonal partial least squares discrimination analysis (OPLS-DA) based on the HS-GC-IMS results with the robustness parameter (R(2)Y) of 99.4%, and prediction ability parameter (Q(2)) of 98.6%, respectively. The results provide a theoretical basis for aroma discrimination, isomer identification, and categories analysis of Huaguo Tea" |
| Keywords: | *Ion Mobility Spectrometry Gas Chromatography-Mass Spectrometry/methods *Volatile Organic Compounds/analysis Multivariate Analysis Odorants/analysis Tea/chemistry Headspace-gas chromatography-ion mobility (HS-GC-IMS) Huaguo tea Isomers Multivariate statis; |
| Notes: | "MedlineLu, Wenhui Chen, Jing Li, Xuebo Qi, Yinghua Jiang, Rui eng Netherlands 2023/01/26 Anal Chim Acta. 2023 Feb 22; 1243:340842. doi: 10.1016/j.aca.2023.340842. Epub 2023 Jan 14" |
