Дослідження показників безпеки та окиснювальної стабільності сафлорової олії

Abstract

This paper presents scientific research results of safflower oil safety attributes. The maintenance of toxic elements (lead, cadmium, copper, zinc, iron) was determined via available method, including product (safflower oil) mineralization through the instrumentality of dry or wet combustion and measuring element concentration in mineralization solution by flame atomic absorption. In the tested sample of safflower oil we also determined such characteristics as: content of pesticides, heptachlorine and mycotoxins. Content of pesticides and heptachlorine was determined in accordance wi th procedures presented in the international standard using gas chromatography method. Availability and quantitative determination of aflatoxins was realized by dimeric thin-layer chromatography and by highyield liquid chromatography respectively. Contentof benz(a)pyrene was determined using spectrofluorimetry (under conditions of low and room temperature) and highyield liquid chromatography with fluorescent detector. Oxidative stability of safflower oil has been investigated by differential scanning cal orimetry according to method well-tested in instrumental research laboratory of Ukrainian research institute of vegetable oils and fats of the National academy of agricultural sciences of Ukraine. Oxidation DSC-grams of pressed safflower oil with addition of antioxidants and a sample of first rateunrefined chilled cold-pressed sunflower oil were also given. DSC-grams obtained for safflower oil with a mixture of tocopherols, aqueous alcoholic extracts of oak bark, green tea and eucalyptus leaves are presented. The uppermost oxidative stability was found in safflower oil with the addition of green tea leaves extract. The lowest effectivity among studied antioxidants was found in aqueous alcoholic extract of eucalyptus leaves. The conducted research of safflower oil oxidative stability with determination of induction period allows to forecast its shelf-life and to offer antioxidants for increasing antioxidant capacity of oil.