This work first describes a simple approach for the untargeted profiling of volatile compounds for distinguishing between white duck down (WDD) and white goose down (WGD) based on resolution-optimized GC-IMS combined ...This work first describes a simple approach for the untargeted profiling of volatile compounds for distinguishing between white duck down (WDD) and white goose down (WGD) based on resolution-optimized GC-IMS combined with optimized chemometric techniques, namely PCA. The detection method for down samples was established by using GC-IMS. Meanwhile, the reason of unpleasant odors caused by WDD was explained on the basis of the characteristic volatile compounds identification. GC-IMS fingerprinting can be considered a revolutionary approach for a truly fully automatable, cost-efficient, and in particular highly sensitive method. A total of 22 compounds were successfully separated and identified through GC-IMS method, and the significant differences in volatile compounds were observed in three parts of WDD and WGD samples. The most characteristic volatile compounds of WGD belong to aldehydes, whereas carboxylic acids from WDD were detected generated by autoxidation reaction. Meanwhile, the main reason of unpleasant odor generation was possibly attributed to the high concentration of volatile carboxylic acids of WDD. Therefore, the constructed model presents a simple and efficient method of analysis and serves as a basis for down processing and quality control.展开更多
The volatile compounds variation of Malus asiatica Nakai under different drying methods is still blank now.In this paper,drying methods of freeze drying(FD),microwave vacuum drying(MVD),microwave freeze drying(MFD),an...The volatile compounds variation of Malus asiatica Nakai under different drying methods is still blank now.In this paper,drying methods of freeze drying(FD),microwave vacuum drying(MVD),microwave freeze drying(MFD),and hot air drying(HAD)were employed to dry fresh M.asiatica Nakai,headspace-gas chromatography-ion mobility spectrometry was adopted to identify volatile compounds in M.asiatica Nakai,principal component analysis(PCA)and the Euclidean distance were used to distinguish the samples.Results showed that 81 peaks were detected,70 volatile compounds were identified,drying makes obvious differences of volatile compounds in M.asiatica Nakai,and drying methods with microwave heating makes most of volatile compounds vanished.Compared to MFD and MVD,FD and HAD were more appropriate to be adopted to dry M.asiatica Nakai due to volatile compounds reserved more in FD and HAD.The results could provide a scientific data basis to help future dried M.asiatica Nakai production.展开更多
文摘This work first describes a simple approach for the untargeted profiling of volatile compounds for distinguishing between white duck down (WDD) and white goose down (WGD) based on resolution-optimized GC-IMS combined with optimized chemometric techniques, namely PCA. The detection method for down samples was established by using GC-IMS. Meanwhile, the reason of unpleasant odors caused by WDD was explained on the basis of the characteristic volatile compounds identification. GC-IMS fingerprinting can be considered a revolutionary approach for a truly fully automatable, cost-efficient, and in particular highly sensitive method. A total of 22 compounds were successfully separated and identified through GC-IMS method, and the significant differences in volatile compounds were observed in three parts of WDD and WGD samples. The most characteristic volatile compounds of WGD belong to aldehydes, whereas carboxylic acids from WDD were detected generated by autoxidation reaction. Meanwhile, the main reason of unpleasant odor generation was possibly attributed to the high concentration of volatile carboxylic acids of WDD. Therefore, the constructed model presents a simple and efficient method of analysis and serves as a basis for down processing and quality control.
基金supported by the national natural Science Foundation of China(52006109).
文摘The volatile compounds variation of Malus asiatica Nakai under different drying methods is still blank now.In this paper,drying methods of freeze drying(FD),microwave vacuum drying(MVD),microwave freeze drying(MFD),and hot air drying(HAD)were employed to dry fresh M.asiatica Nakai,headspace-gas chromatography-ion mobility spectrometry was adopted to identify volatile compounds in M.asiatica Nakai,principal component analysis(PCA)and the Euclidean distance were used to distinguish the samples.Results showed that 81 peaks were detected,70 volatile compounds were identified,drying makes obvious differences of volatile compounds in M.asiatica Nakai,and drying methods with microwave heating makes most of volatile compounds vanished.Compared to MFD and MVD,FD and HAD were more appropriate to be adopted to dry M.asiatica Nakai due to volatile compounds reserved more in FD and HAD.The results could provide a scientific data basis to help future dried M.asiatica Nakai production.
