Technology Of Drying Ways And Peel Of Hazelnut And Different Antioxidant Ways Influence The Quality Of Hazelnut Oil

Hazelnut enjoyed "king of nuts" reputation, has a high nutritional value.However, hazelnut oil contains large amount of unsaturated fatty acids, and it iseasily oxidized or prolonged contact with air, caused oil quality dropped and theshelf life shortened. In addition, now with clothing hazelnuts press, hazelnut oilshowed a deep yellow orange. Therefore, it is necessary to study this precious oiland to extend the shelf life. This article aims to study the picked hazelnut storage,hazelnuts strip, methods of pressing and adding antioxidants.(1) Different ways of drying fruit influence quality of hazelnutIt is very essential for new picked hazelnuts to be well stored. The hazel dryway and the effect are determined by nuclear magnetic resonance (NMR) test,peroxide value and moisture content. The hazel nuclear magnetic resonance ofparameters will be determined after drying of the hazel in NMR CPMG experiment.To T2inversion, T22, T23after T21ratio change. Hazel T21the range of0.10~0.70ms, the T22range of0.75~5ms, T23range for5ms above; The way to dry onhazel peroxide value on the effects of: drying oven drying hazel> vacuum dryingof hazel> microwave drying hazel> natural dry hazel> frozen dry hazel; The bestway to dry-freezing drying the parameters are: the frozen5h, frozen24h, vacuumdegree1.0Pa, the moisture content8.62%, peroxide value0.65mmol/Kg. Afterdrying the hazel will be filled with nitrogen in order to improve the quality of thehazelnut bouquet.(2) Hazel nuts strip influences colour and lustre of hazel oil.Hazel nuts are stripped by the methods of alkaline process, heat bilges coldshrink and water enzymatic strip. Alkaline process strip rate was100%, the heatbilges cold shrink method and water enzymatic strip rate were50%and12% respectively. Strip make hazel oil chroma of the yellow value lower from23.42to16.40; Chroma green value from3.50to3.01.(3) Different antioxidant ways influence the quality of hazel oil.In peroxide value, acid value, the content and benzodiazepines acid value andcarbonyl value as the index, to accelerate oxidation experiment to see differentantioxidants to hazel oxidation resistance of oil. TBHQ antioxidant effect theoptimal, vitamin E is the second smallest, and tea polyphenol and nitrogen fillingeffect is poorer; Different drying methods to hazel oil peroxide value influence for:drying oven drying> vacuum drying> microwave drying natural drying> freezingdrying; The influence of high temperature against antioxidant for: tea polyphenols> vitamin E> TBHQ;2mg/kg Fe3+against antioxidant effects: tea polyphenols>TBHQ> vitamin E,0.2mg/kg Cu2+against antioxidant effects: tea polyphenols>vitamin E> TBHQ. So, choose TBHQ or vitamin E.