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| Effect of triglycerides composition on solidification phenomenon of peanut oil |
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| DOI： |
| KeyWord:peanut oil solidification triglyceride |
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| Abstract: |
| Peanut oil will appear small amount of sediment at the bottom when placed at a ambient temperature fluctuated greatly, while the sediment can disappear after heating. In order to the study the reason, DSC and TAG analysis of the sediment were performed. The preliminary experiment results showed that the sediment would cause the solidification of peanut oil. Then liquid fraction and solid fraction of peanut oil were separated by fractionation, and the triglyceride composition and crystal of solid fraction were analyzed by TAG and XRD.The results showed that the liquid fraction was difficult to coagulate, indicating that the solidification of peanut oil was mainly affected by triglyceride composition in peanut oil. When peanut oil placed at temperature below 7?℃,the SU2,S2U triglycerides formed β form and β′ form ,and wrapped liquid oil around to solidify, so due to temperature fluctuations during storage, some high-melting point triglycerides, mainly were S3,S2U triglycerides, precipitated out, and sediment produced. |
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