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EnglishAn experimental investigation was carried out in order to evaluate the influence of deodor-ization temperature on the levels of the triacylglycerol oxidation and polymerization compounds in the deodorized oil. The deodorization was carried out at temperatures between 180 and 240°C, using a laboratory-scale pilot plant. The results showed an increase of triacylglycerol oligopolymers (PTAG) and a decrease of the levels of oxidized triacylglycerols (TAG-ox) as the deodorization temperature increased. Also a significant increase in the overall non volatile oxidation level, which can be evaluated with the sum PTAG% + TAG-ox%, was observed as a consequence of the increase of the deodorization temperature. The presence of lower levels of TAG-ox in the oils deodorized at higher temperatures may result in an improvement of oxidative stability in the resulting oil, since the pro-oxidant activity of TAG-ox has been shown to be greater than that exerted by PTAG.
| Titolo: | Influence of the deodorisation temperature on the oxidative degradation of olive oil |
| Autori: | |
| Data di pubblicazione: | 2012 |
| Rivista: | |
| Abstract: | An experimental investigation was carried out in order to evaluate the influence of deodor-ization temperature on the levels of the triacylglycerol oxidation and polymerization compounds in the deodorized oil. The deodorization was carried out at temperatures between 180 and 240°C, using a laboratory-scale pilot plant. The results showed an increase of triacylglycerol oligopolymers (PTAG) and a decrease of the levels of oxidized triacylglycerols (TAG-ox) as the deodorization temperature increased. Also a significant increase in the overall non volatile oxidation level, which can be evaluated with the sum PTAG% + TAG-ox%, was observed as a consequence of the increase of the deodorization temperature. The presence of lower levels of TAG-ox in the oils deodorized at higher temperatures may result in an improvement of oxidative stability in the resulting oil, since the pro-oxidant activity of TAG-ox has been shown to be greater than that exerted by PTAG. |
| Handle: | http://hdl.handle.net/11587/439655 |
| Appare nelle tipologie: | Articolo pubblicato su Rivista |
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