| Autor: |
Petrova, E., Borisenkova, S., Kaliya, O. |
| Zdroj: |
Russian Chemical Bulletin; October 2004, Vol. 53 Issue: 10 p2322-2326, 5p |
| Abstrakt: |
The products of ascorbic acid oxidation in the presence of cobalt octa-4,5-carboxy-phthalocyanine sodium salt (TPH) were identified. These include the ascorbate radical (A·), hydroxyl radical (OH·), and hydrogen peroxide (H2O2). The kinetics of accumulation and consumption of the reaction products was studied. For the concentration ranges of ascorbic acid $$C_{AH_2 }$$ = 0–2.5 ⋅ 10−3mol L−1and the catalyst CTPH= 0–3.5 ⋅ 10−5mol L−1, the the highest possible concentration of the ascorbate radical is ∼10−7mol L−1, the concentration of H2O2is 7 ⋅ 10−4(30% of the starting concentration of ascorbic acid) and the concentration of the hydroxyl radical is at most 10−6mol L−1. |
| Databáze: |
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