Determination of the Degree of Unsaturation in Essential Oils

Being widely used, medicinal products based on vegetable oils require strict regulation and evaluation of quality attributes, determination shelf-life periods, monitoring storage conditions. The most common testing method for unsaturated compounds in is the iodine value determination, which has a range limitations. An alternative determining degree unsaturation epoxidation. aim study was to evaluate possibility terpenoids essential using peroxycarboxylic acids. Materials methods . authors performed epoxidation linalool, myrcene, lemon oil with peroxydecanoic peroxyoctanoic acids, followed by iodometric titration excess acid. Results demonstrated measuring selected peracid developed procedure calculated values oil. Epoxidation proceeded as second-order reaction. obtained following reaction rate constants: 3.9 L×mol –1 ×min linalool (298 К), 1.76 myrcene converting monoxide 0.044 epoxide diepoxide (297 К). Conclusions suggested involving rapid efficient (iodine value) provides potential basis developing quantification total bioactive oils.