Kinetics of Decomposition of Aspartame Hydrochloride (Usal) in Aqueous Solutions

Autor:	M. Kmínek, E. Davídková, J. Davídek, M. Prudel
Rok vydání:	1986
Předmět:	chemistry.chemical_compound Dipeptide Aqueous solution chemistry Aspartame Hydrochloride Kinetics Organic chemistry Decomposition Phenylalanine methyl ester Food Science Nuclear chemistry
Zdroj:	Journal of Food Science. 51:1393-1397
ISSN:	1750-3841 0022-1147
Popis:	A scheme of aspartame hydrochloride (Usal) decomposition in relation to the pH and temperature which takes into account the possibility of phenylalanyl-aspartic acid dipeptide formation is suggested and experimentally confirmed. Aspartyl-phenylalanine and diketopiperazine were found to be the main decomposition products. The concentration of diketopiperazine increases and that of aspartyl-phenylalanine de-creases with increasing pH. At pH 2.9 less aspartyl-phenylalanine and more diketopiperazine is formed with increase in temperature; twice the concentration of phenylalanine methyl ester was found at 80° and 90°C when 50% of the Usal present in the medium was decomposed, as compared to that determined at 25° and 40°C. The distribution of the remaining products remained constant over the entire range measured.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2ad79eb6559c1682b6221434bbde76b8 https://doi.org/10.1111/j.1365-2621.1986.tb13819.x Zobrazit plný text záznamu Plný text