Comparative Analysis of Methods for the Determination of Rosin Acids in Tall Oil
摘要
Compared in this study are methods for determining rosin acids in crude and distilled tall oils. It is shown that the determination of rosin acids using the standard titrimetric method TS 13-0281078-119-89 results in underestimated results compared to the data obtained by the GOST R 50378-92 method. The most significant factor influencing the analysis results is the type of the alcohol used as a solvent. The measured concentrations of rosin acids increase in the following order: methanol < n-butanol < isopropanol. The GOST R 50378-92 method ensures reliable results and can be recommended for routine analysis of tall oils.