|
| Contents of different structure esters in re-esterified triglyceride type fish oil and its stability |
| |
| DOI： |
| KeyWord:fish oil re-esterified triglyceride different structure ester stability |
| FundProject: |
|
| Hits: 3657 |
| Download times: 3159 |
| Abstract: |
| Re-esterified triglyceride (rTG) type fish oil is a mixture of triglycerides (TG), diglycerides (DG), monoglycerides (MG) and ethyl esters (EE). In order to learn about the distribution of different structural esters in rTG type fish oil and their effects on product stability, 18 batches of rTG type fish oil from 10 factories in domestic and abroad were collected, the contents of different structure esters were determined by HPLC-differential refractive index detector and compared to nature TG type fish oil and EE type fish oil, and effect of TG content on the stability of fish oil product was investigated. The results showed that the TG content in rTG type fish oil was 52.17%-94.80%, among which only 4 batches samples were higher than 90%. The content of partial glycerides ranged from 4.96% to 38.97%, and the EE content ranged from 028% to 13.10%, with 7 batches samples exceeding 5%, which did not meet the requirements of European Pharmacopoeia(EP10.3). The TG content in natural TG type fish oil was above 97%, and the EE content in EE type fish oil was above 99%. Compared with rTG type fish oil products with low TG content (64.09%), rTG type fish oil products with high TG content (90.80%) had relatively small changes in acid value and peroxide value compared to raw materials. During the accelerated oxidation process, the acid value of rTG type fish oil products with high TG content was stable, while the acid value of rTG type fish oil products with low TG content significantly increased. TG content may be related to the stability of rTG type fish oil, and rTG type fish oil with high TG content has better stability than rTG type fish oil with low TG content. |
| View full text View/Add Comment Download reader |
| Close |
|
|
|
