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| Effect of drying method of Idesia polycarpa fresh fruit on the quality of Idesia polycarpa oil |
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| DOI： |
| KeyWord:drying method Idesia polycarpa Idesia polycarpa oil oil quality volatile substance |
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| Abstract: |
| Aiming to provide a reference for the selection of suitable drying methods for Idesia polycarpa, hot air drying(HD), vacuum microwave drying(VMD), vacuum freeze drying(VFD) were used respectively to dry the Idesia polycarpa fresh fruit and the oil was prepared by solvent extraction. The yield, acid value, peroxide value, fatty acid composition, squalene content and volatile substances composition of Idesia polycarpa oil (IPO) were determined to investigate the effects of three drying methods on the quality of IPO. The results showed that the order of the oil yield of the three drying methods was VFD＞HD＞VMD, the order of the acid value and peroxide value of IPO was VMD＞HD＞VFD (none of them exceeded the requirements of the national standard), there was no differences in fatty acid composition of IPO of the three drying methods, the order of the squalene content was VFD＞VMD＞HD, and the major volatile substances were alkanes of the three drying methods. By comprehensive comparison, IPO extracted after drying by VFD has the best quality and VFD is suitable for a few experiments. The drying efficiency of VMD is high, which is suitable for rapid drying.The quality of IPO extracted after drying by HD is between VMD and VFD, but HD is simple and suitable for processing materials in large quantities. |
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