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Citation: Zhang Fayi, Zhang Yibao, Liu Jian, Zhao Xuezhuang*. STUDY OF ASCORBIC ACID OXIDATION REACTION——KINETICS OF OXIDATION BY MOLECULAR OXYGEN[J]. Acta Physico-Chimica Sinica, ;1986, 2(04): 335-341. doi: 10.3866/PKU.WHXB19860412 shu

STUDY OF ASCORBIC ACID OXIDATION REACTION——KINETICS OF OXIDATION BY MOLECULAR OXYGEN

1.
Department of Chemistry & Test and Computation Center, Nankai University, Tianjin

Received Date: 16 August 1985
Available Online: 15 August 1986

In this paper, the kinetics and mechanism of the copper( Ⅱ )-catalysed oxidation of ascorbic acid(vitamine C, H2A) by molecular oxygen have been analyzed in detail, and the oscillatory phenomenon of this reaction was discussed.
Young et al~[9] found chemical oscillatory phonomenon of this reaction. In this paper, the oscillatory phonomenon was studied at pH 6-8, The oscillatory phonomenon take place easily in the range of such pH value(as Fig.1). However, the exact number andamplitude of the oscillations could not be exactly duplicated.
The kinetics and mechanism of the reaction on nonoscillatory condition vere studied in detail.
Experimental condition: Phosphate buffer pH=6.0—7.5.......
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