Geographical differentiation of Molixiang table grapes grown in China based on volatile compounds analysis by HS-GC-IMS coupled with PCA and sensory evaluation of the grapes

Tao Feng; Jiaqing Sun; Shiqing Song; Huatian Wang; Lingyun Yao; Min Sun; Kai Wang; Da Chen

doi:10.1016/j.fochx.2022.100423

Geographical differentiation of Molixiang table grapes grown in China based on volatile compounds analysis by HS-GC-IMS coupled with PCA and sensory evaluation of the grapes

Food Chem X. 2022 Aug 9:15:100423. doi: 10.1016/j.fochx.2022.100423. eCollection 2022 Oct 30.

Authors

Tao Feng¹, Jiaqing Sun¹, Shiqing Song¹, Huatian Wang¹, Lingyun Yao¹, Min Sun¹, Kai Wang², Da Chen³

Affiliations

¹ School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, China.
² Technology Center of China Tobacco Yunnan Industrial Co., Ltd., Kunming 650231, China.
³ Department of Food Science and Technology, The Ohio State University, 2015 Fyffe Rd, Columbus, OH 43210, United States.

Abstract

In this study, the volatile fingerprints of GC-IMS showed great differences on the volatile profiles of Molixiang grapes collected from three different regions of China, which suggested that aroma of table grapes could be largely impacted by origin areas. Butyl lactate, E-2-octenal and Z-2-pentanol were mainly contained in MLX-A, the grapes sampled from Ningbo, China. High contents of p-cymene, styrene and γ-terpinene were observed in MLX-B grapes sampled from Beizhen, China. In addition, benzaldehyde and methyl benzoate were major contained in MLX-C grapes sampled from Zhangzhou, China. The PCA results revealed effective differentiation of samples from different geographical origin based on the information obtained from GC-IMS. Furthermore, sensory evaluation showed that the aroma characters of grapes from different geographical origin were significantly different (P ≤ 0.05). E-2-octenal, styrene and benzaldehyde might serve as the geographical marker compounds of origin area based on the results of GC-IMS analysis and sensory evaluation.

Keywords: Gas chromatography-ion mobility spectrometry (GC-IMS); Geographical marker compounds; Table grapes; Volatile profiles.