Voltammetric Determination of Sinomenine at Glassy Carbon Electrode Modified by Cysteic Acid based on Electrochemical Oxidation of L-cysteine
Cysteic acid based on electrochemical oxidation of L-cysteine (CySH) form a novel thin film material at a glassy carbon electrode (GCE) for electroanalytical determination of sinomenine. The determination of sinomenine at the modified electrode with strongly accumulation was studied by differential...
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| Published in | International journal of electrochemical science Vol. 2; no. 8; pp. 572 - 582 |
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| Main Authors | , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier B.V
01.08.2007
Elsevier |
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| Abstract | Cysteic acid based on electrochemical oxidation of L-cysteine (CySH) form a novel thin film material at a glassy carbon electrode (GCE) for electroanalytical determination of sinomenine. The determination of sinomenine at the modified electrode with strongly accumulation was studied by differential pulse voltammetry (DPV). The peak current obtained at + 0.650 V (vs. SCE) from DPV was linearly dependent on the sinomenine concentration in the range of 1.0 × 10-6 ~ 1.0 × 10-4 M in a B-R buffer solution (0.04 M, pH 1.81) with a correlation coefficient of 0.999. The detection limit (S/N = 3) was found to be 6.0 × 10-7 M. The low-cost modified electrode showed good sensitivity, selectivity, stability and had been applied to the determination of sinomenine in pharmaceutical formulations with satisfactory results. The electrochemical reaction mechanism of sinomenine was also discussed firstly. |
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| AbstractList | Cysteic acid based on electrochemical oxidation of L-cysteine (CySH) form a novel thin film material at a glassy carbon electrode (GCE) for electroanalytical determination of sinomenine. The determination of sinomenine at the modified electrode with strongly accumulation was studied by differential pulse voltammetry (DPV). The peak current obtained at + 0.650 V (vs. SCE) from DPV was linearly dependent on the sinomenine concentration in the range of 1.0 × 10-6 ~ 1.0 × 10-4 M in a B-R buffer solution (0.04 M, pH 1.81) with a correlation coefficient of 0.999. The detection limit (S/N = 3) was found to be 6.0 × 10-7 M. The low-cost modified electrode showed good sensitivity, selectivity, stability and had been applied to the determination of sinomenine in pharmaceutical formulations with satisfactory results. The electrochemical reaction mechanism of sinomenine was also discussed firstly. |
| Author | Hu, Xiaoya Wang, Zhixian Qu, Qishu Yang, Gongjun Guan, Jun Wang, Chengyin |
| Author_xml | – sequence: 1 givenname: Jun surname: Guan fullname: Guan, Jun organization: Subei Hospital, Yangzhou 225002, China – sequence: 2 givenname: Zhixian surname: Wang fullname: Wang, Zhixian organization: College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China – sequence: 3 givenname: Chengyin surname: Wang fullname: Wang, Chengyin email: yzswcy@yzcn.net organization: College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China – sequence: 4 givenname: Qishu surname: Qu fullname: Qu, Qishu organization: College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China – sequence: 5 givenname: Gongjun surname: Yang fullname: Yang, Gongjun organization: College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China – sequence: 6 givenname: Xiaoya surname: Hu fullname: Hu, Xiaoya email: xyhu@yzu.edu.cn organization: College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China |
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| Keywords | L-cysteine voltammetry cysteic acid sinomenine human serum |
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| Title | Voltammetric Determination of Sinomenine at Glassy Carbon Electrode Modified by Cysteic Acid based on Electrochemical Oxidation of L-cysteine |
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