Abstract
Abstract To establish a method for fast discrimination of avocado oil for different extracted methods, the headspace-gas chromatography-ion mobility spectroscopy (HS-GC-IMS) combined with principal component analysis (PCA) was used to analyze non-target volatile organic compounds (VOCs). The results showed that 40 VOCs were identified, and the VOCs of the extraction method had a significant difference and had been well distinguished in PCA. The species and content of avocado oil obtained by squeeze method were more than the aqueous methods and supercritical carbon dioxide extraction methods (SC CO2). In addition, the different avocado oil had their characteristic compounds: the 2-acetylthiazole and ethyl propionate were the unique compounds in the avocado oil obtained by SC CO2. A rapid method for the determination of avocado oil obtained by different extraction methods based on HS-GC-IMS had been established, and the method was fast and simple and had a good application prospect in the prediction of avocado oil processing methods.
Highlights
Avocado (Persea americana Mill.) is mainly distributed in tropical and subtropical areas within north-south latitude of 30° or less
The 3D topographical visualization spectra of volatile organic compounds (VOCs) produced by different extraction methods of avocado oil are shown in Figure 1, where the X-axis represented the ion migration time used for identification, the Y-axis represented the retention time of the gas chromatograph, and the Z-axis represented the peak height used for quantification
40 VOCs were identified by gas chromatography (GC)-Ion mobility spectrometry (IMS) in avocado oil obtained from different extraction methods
Summary
Avocado (Persea americana Mill.) is mainly distributed in tropical and subtropical areas within north-south latitude of 30° or less It is a fruit and a kind of woody oil [1]. Ion mobility spectrometry (IMS) is an analytical instrument used for identifying chemical ionic species, which is based on the different migration speeds of different gas-phase ions in the gas phase. It is a fast, convenient, and low-cost analytical method. The HSGC-IMS with principal component analysis (PCA) was performed to establish a method for fast discrimination of avocado oil for different extracted methods
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