DETERMINATION OF TRACE AMOUNT OF IRON BY ADSORPTION VOLTAMMETRY

Chinese Journal of Applied Chemistry ›› 1991, Vol. 0 ›› Issue (4): 86-89.

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DETERMINATION OF TRACE AMOUNT OF IRON BY ADSORPTION VOLTAMMETRY

Zhang Xiaoli, Wang Lizeng, Wei Peiling, Chen Rongli

Department of Chemistry, Shandong University, Jinan 250100

Received:1990-07-09 Revised:1990-11-05 Published:1991-08-10 Online:1991-08-10

Abstract

Abstract: A sensitive adsorptive wave of Fe-5-Br-PADAP complex was obtained by linear sweepvoltammetry in HAc-NaAc solution.The peak potential is -0.05V (vs.SCE).The peakcurrent is directly proportional to the concentration of Fe(Ⅲ) in the range of 2.0×10^-9～1.0×10^-7mol/L, the detection limit is 4.0×10^-10 mol/L.The adsorption phenomena wereobserved, the electrode reaction appeared an irreversible reduction of the complex, whichhas a composition of 1:2 with apparent stability constant 1.3×10¹².This method has beenapplied to analysis of food, drinks and grain crops.

Key words: iron, microanalysis, adsorption voltammetry

Zhang Xiaoli, Wang Lizeng, Wei Peiling, Chen Rongli. DETERMINATION OF TRACE AMOUNT OF IRON BY ADSORPTION VOLTAMMETRY[J]. Chinese Journal of Applied Chemistry, 1991, 0(4): 86-89.

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DETERMINATION OF TRACE AMOUNT OF IRON BY ADSORPTION VOLTAMMETRY

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