A New Approach for Studying the Stability and Degradation Products of Ascorbic acid in Solutions
نویسندگان
چکیده
The potentiometric titration (PT) method has been applied for the first time to investigate stability of l-ascorbic acid (H2Asc) and determine its degradation products in aqueous solutions. presented electrochemical procedures can be considered a fast, simple inexpensive way control H2Asc regular analytical practice as well chemical pharmaceutical industries. Experimental data modeling suggest that enolic form 2,3-diketogulonic predominates solution main product dehydroascorbate degradation. Furthermore, PT results supported by conductometric measurements electrospray ionization mass spectrometry enable us propose putative mechanism decomposition. Moreover, it proven among different types investigated electrolytes (KNO3, KClO4 KSCN), thiocyanate ions (SCN−) reveal stabilizing effect against H2Asc. Thus, presence SCN− is proposed an alternative some organic solvents earlier used. Finally, new paraffin-protection-layer procedure recommended studying storage solutions comprising components sensitive external factors (e.g. O2, CO2) evaporation.
منابع مشابه
a synchronic and diachronic approach to the change route of address terms in the two recent centuries of persian language
terms of address as an important linguistics items provide valuable information about the interlocutors, their relationship and their circumstances. this study was done to investigate the change route of persian address terms in the two recent centuries including three historical periods of qajar, pahlavi and after the islamic revolution. data were extracted from a corpus consisting 24 novels w...
15 صفحه اولa frame semantic approach to the study of translating cultural scripts in salingers franny and zooey
the frame semantic theory is a nascent approach in the area of translation studies which goes beyond the linguistic barriers and helps us to incorporate cognitive and cultural factors to the study of translation. based on rojos analytical model (2002b), which centered in the frames or knowledge structures activated in the text, the present research explores the various translation problems that...
15 صفحه اولA new approach on studying the stability of evolutionary game dynamics for financial systems
Financial market modeling and prediction is a difficult problem and drastic changes of the price causes nonlinear dynamic that makes the price prediction one of the most challenging tasks for economists. Since markets always have been interesting for traders, many traders with various beliefs are highly active in a market. The competition among two agents of traders, namely trend follo...
متن کاملa fundamental study of "histiriographic metafiction", and "literary genres", as introduced in "new historical philosophy", and tracing them in the works of julian barnes.
abstract a fundamental study of “historio-graphic metafiction” and “literary genres”, as introduced in “new historical philosophy”, and tracing them in the works of julian barnes having studied the two novels, the porcupine and arthur & george, by julian barnes, the researcher has applied linda hutcheon’s historio-graphic metafictional theories to them. the thesis is divided into five cha...
15 صفحه اولAn Investigation into the Degradation of Ascorbic Acid in Solutions
Accepted: 27/08/2014 Abstract The kinetics of the degradation of ascorbic acid (AA) in solution during heating at 30, 50, 70 and 90°C for 180 min and during 7 weeks of storage at 4°C and 20°C were investigated. The concentration of AA in solution was determined by the fluorimetric method before heating and storing the samples under different conditions. The retention of AA after heating at 30, ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Solution Chemistry
سال: 2023
ISSN: ['0095-9782', '1572-8927']
DOI: https://doi.org/10.1007/s10953-023-01260-9