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Citation: LI Li-Yang, LI Jin-Zhou, LI Ying-Ying. Adsorptive Wave of Triple Complex of Lead with Furoylpyrazolone and 2,2'-Dipyridine[J]. Chinese Journal of Applied Chemistry, ;2007, 24(1): 71-75. shu

Adsorptive Wave of Triple Complex of Lead with Furoylpyrazolone and 2,2'-Dipyridine

1.
Department of Chemsitry, Harbin Normal University, Harbin 150025

Corresponding author: LI Jin-Zhou,
Received Date: 30 January 2006
Available Online: 16 August 2006
Fund Project: 黑龙江省自然科学基金(B01-07) (B01-07)黑龙江省教育厅科研基金(10541082)资助项目 (10541082)

In a medium of HAc-NaAc(pH=3.51), a triple complex is formed via Pb(Ⅱ) reacting with 1-phenyl-3-methyl-4-(α-furoyl) pyrazolone-5 (HPMαFP) and 2, 2'-dipyridine (dipy), and there appears a sensitive polarographic wave at -0.73 V(vs.SCE) for the triple complex.The peak current exhibits linear relation with the concentration of Pb(Ⅱ) from 2×10^-9 g/mL to 9×10^-6 g/mL.The detection limit is 2×10^-9 g/mL.By using different electrochemical methods, the properties of the polarographic wave and the mechanism of electrode reaction were studied.The results indicate that the polarographic wave at-0.73 V is an adsorptive wave of the complex.The peak current is produced by the reduction of the Pb (Ⅱ) ion.The molar ratio of Pb(Ⅱ) with dipy to HPMaFP in the complex is 1:1:1; and the conditional formation constant of the complex is 5.06×10⁶.The method was used to determine lead in thick salt, cane sugar and comestic samples.The recovery is 99.3%~100.4%.
- furoylpyrazolone,
- dipyridine,
- lead,
- adsorptive wave of complex
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