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| Determination method of acid value and peroxide value of vegetable oil |
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| DOI： |
| KeyWord:vegetable oil acid value peroxide value petroleum ether dichloromethane |
| FundProject:云南省重大专项（202002AA1000055， 202002AA100007， 202102AE090031,202204BI090014）；云南省科技厅-云南中医药大学联合专项重点项目（2019FF002-006） |
| Author Name | Affiliation | | YANG Dingfa1,2, NIU Ruonan1,2, ZHAO Shenglan1,2 | 1.Traditional Chinese Medicine College, Yunnan University of Traditional Chinese Medicine,
Kunming 650500, China
2.Yunnan Key Laboratory of Topical Drug Delivery System and
Formulation Technology Research in Universities and Colleges of Yunnan Province,
Kunming 650500, China |
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| Abstract: |
| In order to solve the problem of solvent safety in the determination of acid value and peroxide value of vegetable oil by national standard method, using walnut oil as experimental material, a method was established to determine the acid value and peroxide value of vegetable oil by replacing ethyl ether and trichloromethane in GB 5009.229-2016 and GB 5009.227-2016 with petroleum ether and dichloromethane, which were safer and easily available, respectively. The precision of the method was investigated.The acid values and peroxide values of four vegetable oils were determined by national standard method and the established method, and the results were subjected to t-test to examine the accuracy of the method. The results showed that the acid value and peroxide value of walnut oil were determined 6 times in parallel, the RSD values of the established methods were 2.055% and 1.318%, respectively.The p-values of acid values and peroxide values of the four vegetable oils by national standard method and the established method were all greater than 0.05, showing no significant difference between the two methods. The established method is characterized by better precision and accuracy, and improves assay safety, so it can be used for the determination of acid value and peroxide value of vegetable oil. |
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