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2011•Journal of Shaanxi University of TechnologyRequires access

Determination of Phenol in water samples by cyclic voltammetry on SWCNT modified electrode

Gong Qiaojuan

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Abstract

Researching the electrochemical behavior of phenol at the Single walled Carbon Nanotube modified electrode was condcted by Cyclic Voltammetry.The experiment results showed in the pH=6.0 HAc-NaAc buffer solution,the oxidation peak current increased linearly with the concentration of phenol in a range of 2.5×10-7～5.0×10-4 mol·L-1 and its regression equation ipa(mA)=1.098c-3.04×10-3(R= 0.9988,c: mmol·L-1) with its detection limit of 8.0×10-8 mol·L-1(RSN =3) at the scan rate of 100mV/s.The modified electrode has been applied to determine phenol in water and its recovery range was 96.7%～105% with satisfactory results.

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What this paper is about

Researching the electrochemical behavior of phenol at the Single walled Carbon Nanotube modified electrode was condcted by Cyclic Voltammetry.The experiment results showed in the pH=6.0 HAc-NaAc buffer solution,the oxidation peak current increased linearly with the concentration of phenol in a range of 2.5×10-7～5.0×10-4 mol·L-1 and its regression equation ipa(mA)=1.098c-3.04×10-3(R= 0.9988,c: mmol·L-1) with its detection limit of 8.0×10-8 mol·L-1(RSN =3) at the scan rate of 100mV/s.The modified electrode has been applied to determine phenol in water and its recovery range was 96.7%～105% with satisfactory results.

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Available abstract

Researching the electrochemical behavior of phenol at the Single walled Carbon Nanotube modified electrode was condcted by Cyclic Voltammetry.The experiment results showed in the pH=6.0 HAc-NaAc buffer solution,the oxidation peak current increased linearly with the concentration of phenol in a range of 2.5×10-7～5.0×10-4 mol·L-1 and its regression equation ipa(mA)=1.098c-3.04×10-3(R= 0.9988,c: mmol·L-1) with its detection limit of 8.0×10-8 mol·L-1(RSN =3) at the scan rate of 100mV/s.The modified electrode has been applied to determine phenol in water and its recovery range was 96.7%～105% with satisfactory results.

Key concepts: Phenol, Cyclic voltammetry, Electrode, Horizontal scan rate, Detection limit, Electrochemistry, Buffer solution, Analytical Chemistry (journal)

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