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1982•Acta Chimica SinicaRequires access

INVESTIGATION ON DIFFERENTIAL PULSE POLAROGRAPHY IV. THE EQUATION OF ADSORPTION-COMPLEX WAVE

Z Zhang

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Abstract

In this paper the equation of adsorption-complex wave in differential pulse polarography is described.According to the reaction scheme M+xL■ML_x ML_x■(ML_x)_(ads) (ML_x)_(ads)■(NL_x)_(ads) (NL_x)_(ads)■NL_x the current controlled by both adsorption and diffusion obeys the following equation: i=0.412nFm~(2/3)t_1~(2/3)D~(1/2)C_M~*(1/δ~(1/2))·(ξ(θ_1-θ_2)/(1+ξθ_2)(1+ξθ_1))·(θ_1-θ_2)/(1+θ_1)(1+θ_2) where θ_1=exp(nF/RT)(E_1-E~0) θ_2=exp(nF/RT)(E_1-E~0+△E) ξ=b_(ML_x)Γ_(ML_(x■m))/b_(NL_x)Γ_(NL_(x,m)) Experiments were carried out on a pulse polarograph to verify the theory. The theoretical conclusion is in good agreement with experimental data for the reduction of U(Ⅵ) in 0.1M HOAc-0.1M NaOAc-0.001% Cupferron solution.

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In this paper the equation of adsorption-complex wave in differential pulse polarography is described.According to the reaction scheme M+xL■ML_x ML_x■(ML_x)_(ads) (ML_x)_(ads)■(NL_x)_(ads) (NL_x)_(ads)■NL_x the current controlled by both adsorption and diffusion obeys the following equation: i=0.412nFm~(2/3)t_1~(2/3)D~(1/2)C_M~*(1/δ~(1/2))·(ξ(θ_1-θ_2)/(1+ξθ_2)(1+ξθ_1))·(θ_1-θ_2)/(1+θ_1)(1+θ_2) where θ_1=exp(nF/RT)(E_1-E~0) θ_2=exp(nF/RT)(E_1-E~0+△E) ξ=b_(ML_x)Γ_(ML_(x■m))/b_(NL_x)Γ_(NL_(x,m)) Experiments were carried out on a pulse polarograph to verify the theory. The theoretical conclusion is in good agreement with experimental data for the reduction of U(Ⅵ) in 0.1M HOAc-0.1M NaOAc-0.001% Cupferron solution.

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Available abstract

In this paper the equation of adsorption-complex wave in differential pulse polarography is described.According to the reaction scheme M+xL■ML_x ML_x■(ML_x)_(ads) (ML_x)_(ads)■(NL_x)_(ads) (NL_x)_(ads)■NL_x the current controlled by both adsorption and diffusion obeys the following equation: i=0.412nFm~(2/3)t_1~(2/3)D~(1/2)C_M~*(1/δ~(1/2))·(ξ(θ_1-θ_2)/(1+ξθ_2)(1+ξθ_1))·(θ_1-θ_2)/(1+θ_1)(1+θ_2) where θ_1=exp(nF/RT)(E_1-E~0) θ_2=exp(nF/RT)(E_1-E~0+△E) ξ=b_(ML_x)Γ_(ML_(x■m))/b_(NL_x)Γ_(NL_(x,m)) Experiments were carried out on a pulse polarograph to verify the theory. The theoretical conclusion is in good agreement with experimental data for the reduction of U(Ⅵ) in 0.1M HOAc-0.1M NaOAc-0.001% Cupferron solution.

Key concepts: Polarography, Chemistry, Analytical Chemistry (journal), Pulse (music), Diffusion, Adsorption, Thermodynamics, Physical chemistry

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INVESTIGATION ON DIFFERENTIAL PULSE POLAROGRAPHY IV. THE EQUATION OF ADSORPTION-COMPLEX WAVE — Research Paper | ScholarLens