DEVELOPMENT OF A METHOD FOR HYDROLYTIC CLEAVAGE OF MOLECULES SAPONINS – DERIVATIVES OF QUILLAJA ACID
UDC 54.052
Abstract
The possibility of hydrolytic decomposition of glycosides soap tree Qullaja. The conditions for the complete hydrolysis of saponins: a mixture of hydrochloric acid, water, ethanol in a ratio of 4 :7.35 : 6.65, heating time – at least 6 hours. The composition of the carbohydrate part of saponins was established – xylose, glucuronic acid, galactose, arabinose were identified in all hydrolysates. The analysis of the obtained fraction of aglycone – willieboy acid physico-chemical methods. Based on the calculation results of chromatographic characteristics (mobility, number and height of theoretical plates), a system for elution of aglycone of the following composition is recommended: petroleum ether–chloroform–acetone (20 : 20 : 5). By the method of potentiometric titration in a non-aqueous solvent medium, the percentage of aglycone in the selected fractions was determined-88.23%. A comparative study of the aqueous solution of aglycone and saponins by UV spectrophotometry. A decrease in the intensity of absorption bands in the 230, 290 nm region responsible for the absorption of carbonyl structures is shown. Analyzed the IR spectra of saponins and willieboy acid identified bands assigned to the vibrations of functional groups of the aglycone and the carbohydrate residue.
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