Artur Przywara

Profile of Fatty Acids and Spectroscopic Characteristics of Selected Vegetable Oils Extracted by Cold Maceration

Abstract Biodiesel has become more attractive material for its properties such as biodegradability, renewability and very low toxicity of its combustion products. A higher quality of this fuel is essential in its potential commercialization. Analytical methods used in biodiesel analysis are constantly refined. The most popular analytical techniques include chromatography and molecular spectroscopy. The ATR-FTIR spectroscopy is one of the most important methods of spectroscopy. This paper presents the results of studies on selected oils of natural origin using ATR-FTIR infrared absorption spectroscopy. Three types of oils from pumpkin seeds and winter rapeseed were analysed. The main fatty acids were also determined in all the samples.

Comparision of Physicochemical Parameters of Rape Seeds Applying the Infrared Spectroscopy Method

Technical progression in sustainable agriculture requires the need for search more and newer analytical methods in order to reduce time of analysis and to minimize costs routine of tests for the highest accuracy of the result. Infrared (IR) and near infrared (NIR) spectroscopy provides such possibility. The paper presents a method of measuring the basic quality parameters (moisture, content of protein, fat, damage and contamination of raw material) of winter rapeseed for cultivars: Abacus, Bellevue, and Adriana+Catana concoction. Statistically significant differences resulting from various measurement systems between results obtained by means of sieve methods and infrared (IR), were observed. A three-dimensional way of measuring the seed shape used in three dimensional particle size analyzer (AWK 3D) suggests that it is more accurate than the measurement applying two-dimensional method used in the shaker with a set of sieves.