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Citation: Li Nan-Qiang, Chen Jian-Hong. Studies on the Polarographic Behaviors of Quercetin and the Catalytic Hydrogen Waves of Heavy Rare Earth Ions-quercetin System[J]. Acta Physico-Chimica Sinica, ;1994, 10(06): 489-494. doi: 10.3866/PKU.WHXB19940603 shu

Studies on the Polarographic Behaviors of Quercetin and the Catalytic Hydrogen Waves of Heavy Rare Earth Ions-quercetin System

1.
Department of Chemistry, Peking University, Beijing 100871

Received Date: 3 December 1992
Available Online: 15 June 1994

The electrochendcal behavior of quercetin among the pH range from 1.5 to 9.5 was studied. In the pH 1.5 to 4.5 and 4.2 to 9.5, two reducing waves were obtained respectively. The former is an irreversible adsorptive wave of molecular quercetin and the latter is an irreversible wave of anodic ion of quercetin.
In the buffer sohition of 0.1 mol·L~(-1) HAc-NaAc, at pH 6.1, the surface catalytic hydrogen waves of the complexes of heavy rare earth ions-quercetin were obtained by single-sweep polarography. The compositions of adsorptive complexes were determined as PE(III):Qu=1:3 by using polarography. In the solution, the compositions of the complexes were determined as RE(III):Qu=1:2 by using photometry. This means that the adsorption of the complex is the pattern of induced adsorption.
- Quercetin,
- Heavy rare earth,
- Polarographic catalytic hydrogen wave,
- Voltammetry
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