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| 对乙酞氨基酚和色氨酸存在下采用改进的碳纳米管糊电极伏安法测定抗坏血酸(英文) | |
| 引用本文： | Hadi BEITOLLAHI,Somayeh MOHAMMADI. 对乙酞氨基酚和色氨酸存在下采用改进的碳纳米管糊电极伏安法测定抗坏血酸(英文)[J]. 催化学报, 2013, 34(6): 1098-1104. DOI: 10.1016/S1872-2067(12)60544-0 |
| 作者姓名： | Hadi BEITOLLAHI Somayeh MOHAMMADI |
| 作者单位： | a Environment Department, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran; b Department of Chemistry, Payame Noor University, 19395-4697, Tehran, Iran |
| 摘 要： | A carbon paste electrode (CPE) modified with carbon nanotubes and 5‐amino‐3’,4’‐dimethyl‐ bi‐ phenyl‐2‐ol (5ADB) is prepared. Under the optimum pH of 7.0, the oxidation of ascorbic acid (AA) on the modified CPE occurs at a potential about 280 mV less positive than that on the unmodified CPE. Some kinetic and thermodynamic parameters for electrocatalytic oxidation of AA, including electron transfer coefficient (α = 0.58) and diffusion coefficient (D = 2.2 × 10-6 cm2/s), are also determined. AA, acetaminophen (AC), and tryptophan (TRP) were detected simultaneously using the modified CPE. The peak potentials recorded using the modified CPE in phosphate‐buffered solution at pH 7.0 were 265, 465, and 780 mV for AA, AC, and TRP, respectively. The modified CPE was successfully used to determine the concentrations of AA, AC, and TRP in real samples. |
| 关 键 词： | Ascorbic acid Acetaminophen Tryptophan Carbon nanotube paste electrode Electrocatalysis |
| 收稿时间： | 2012-11-04 |
Voltammetric determination of ascorbic acid in the presence of acetaminophen and tryptophan using an improved carbon nanotube paste electrode |
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| Hadi BEITOLLAHI a,Somayeh MOHAMMADI b a Environment Department. Voltammetric determination of ascorbic acid in the presence of acetaminophen and tryptophan using an improved carbon nanotube paste electrode[J]. Chinese Journal of Catalysis, 2013, 34(6): 1098-1104. DOI: 10.1016/S1872-2067(12)60544-0 | |
| Authors: | Hadi BEITOLLAHI a Somayeh MOHAMMADI b a Environment Department |
| Affiliation: | a Environment Department, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran; b Department of Chemistry, Payame Noor University, 19395-4697, Tehran, Iran |
| Abstract: | A carbon paste electrode (CPE) modified with carbon nanotubes and 5-amino-3'',4''-dimethyl- biphenyl-2-ol (5ADB) is prepared. Under the optimum pH of 7.0, the oxidation of ascorbic acid (AA) on the modified CPE occurs at a potential about 280 mV less positive than that on the unmodified CPE. Some kinetic and thermodynamic parameters for electrocatalytic oxidation of AA, including electron transfer coefficient (α = 0.58) and diffusion coefficient (D=2.2×10-6 cm2/s), are also determined. AA, acetaminophen (AC), and tryptophan (TRP) were detected simultaneously using the modified CPE. The peak potentials recorded using the modified CPE in phosphate-buffered solution at pH 7.0 were 265, 465, and 780 mV for AA, AC, and TRP, respectively. The modified CPE was successfully used to determine the concentrations of AA, AC, and TRP in real samples. |
| Keywords: | Ascorbic acid Acetaminophen Tryptophan Carbon nanotube paste electrode Electrocatalysis |
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