Rabiej-Kozioł Dobrochna, Krzemiński Marek P, Szydłowska-Czerniak Aleksandra
Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Toruń, Poland.
Materials (Basel). 2021 Jun 4;14(11):3092. doi: 10.3390/ma14113092.
In recent years, steryl esters have become an attractive for the cosmetic, pharmaceutical, and food industries. Hence, the effect of exogenous antioxidant, β-sitosteryl sinapate on oxidative stability and antioxidant activity (AA) of refined rapeseed oil was evaluated by the accelerated shelf-life test. Oxidative parameters of refined rapeseed oil-peroxide value (PV), anisidine value (-AnV), acid value (AV), and spectrophotometric indices (K, K)-increased during storage. However, the addition of β-sitosteryl sinapate caused a decrease of the primary and secondary oxidation products in the supplemented oils in comparison with the control sample. Moreover, oils with steryl ester had higher AA than oil without the synthetic antioxidant. The accelerated storage negatively affected the antioxidant potential of refined and enriched oils causing the AA decrease by 25-54% and 7-15%, respectively. Studies have consistently demonstrated beneficial associations between the presence of β-sitosteryl sinapate in oil samples and the inhibition of their oxidative degradation under the accelerated conditions. Additionally, the possibility of using the synchronous fluorescence (SF) spectroscopy and excitation-emission matrix (EEM) fluorescence spectroscopy for identification and observing changes in main fluorescent components present in non-supplemented and supplemented rapeseed oils during the accelerated storage was attempted.
近年来，甾醇酯已成为化妆品、制药和食品行业颇具吸引力的物质。因此，通过加速货架期试验评估了外源抗氧化剂芥子酸β-谷甾醇酯对精炼菜籽油氧化稳定性和抗氧化活性（AA）的影响。在储存过程中，精炼菜籽油的氧化参数——过氧化值（PV）、茴香胺值（-AnV）、酸值（AV）和分光光度指数（K、K）均有所增加。然而，与对照样品相比，添加芥子酸β-谷甾醇酯可使添加该物质的油中一级和二级氧化产物减少。此外，含有甾醇酯的油比不含合成抗氧化剂的油具有更高的抗氧化活性。加速储存对精炼油和强化油的抗氧化潜力产生了负面影响，导致其抗氧化活性分别降低了25 - 54%和7 - 15%。研究一致表明，油样中存在芥子酸β-谷甾醇酯与在加速条件下抑制其氧化降解之间存在有益关联。此外，还尝试利用同步荧光（SF）光谱和激发-发射矩阵（EEM）荧光光谱来识别和观察在加速储存过程中未添加和添加了芥子酸β-谷甾醇酯的菜籽油中主要荧光成分的变化。
