Спектрофотометричне визначення аскорбінової кислоти з використанням бісмутовмісного 18-молібдодифосфату
作者： Galina A. Petrushina , Juliya V. Mekh , Ludmila P. Tsiganok , Andriy B. Vishnikin , Darya V. Podgornaya
DOI: 10.15421/081405
关键词: Keggin structure 、 Nuclear chemistry 、 Inorganic chemistry 、 Absorption (chemistry) 、 Ascorbic acid 、 Reagent 、 Detection limit 、 Bismuth 、 Reduction rate 、 Chemistry
摘要: Reactions of formation and reduction bismuth substituted 18-molybdophosphate (18-MBPC) with ascorbic acid (Asc) have been investigated. 18-MBPC is reduced by Asc in the presence Bi(III) ions at ratio Asc:18-MBPC 1:1 2:1 of, respectively, two- four-electron heteropoly blues. Their spectra are similar to metalsubstituted blues Keggin structure an absorption maximum 690 nm. Selective, rapid simple method was developed for determination Asc. Benefits using 18-MPBC as analytical reagent high sensitivity rate rate, including behavior solutions. The limit detection 2.6·10 –6 mol/l ( l = 1 cm ), e 1.15·10 4 mol –1 ·l·cm .
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