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March 2018 (published: 31.03.2018)
Home > Issue > The study of vegetable oils and their blends by methods of reflection spectroscopy and refractometry
The study of vegetable oils and their blends by methods of reflection spectroscopy and refractometry
Alla P. Nechiporenko, Liudmila V. Plotnikova, Nechiporenko U., Mel’nikova M.I., Uspenskaya Maya Valerievna
Methods of refractometry and infrared spectroscopy frustrated total internal reflection investigation of a series of 4 groups of industrial vegetable oils, classified according to the iodine number, and a number of two-component blends of oils from different groups with variable ratio and order of mixing the components, based on the data of refractometric analysis. Thus, it is noted that the change in intensity of characteristic bands in the IR spectra of oils (722, 1653, 3008, 2923 and 2853 cm-1) from different groups and their blends, depending upon composition, meets the character of changes of the refractive index profile refractive index, iodine value and % (relative.) fat in the test series. The intensity of the monitored spectral bands andri indices of the individual oils and blended systems are linked by a linear dependence. It is shown that when blending oils, depending on the type, ratio and order of mixing the components vary greatly correlated parameters from both methods, which allow to talk about changing the structure and size of the newly formed associates of triglycerides. This is especially noticeable when blending oils I (oleic) and III (linolenic) groups. The data obtained can be useful for Oracle production and science, which uses the properties of the blended oil systems, such as medicine, cosmetology, farmacevtika, herbal medicine, food industry.
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Keywords: spectral analysis; electronic spectroscopy of reflection; refractometry; infrared spectroscopy; oil blends.
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