Citation: WEI Shou-Lian, LI Jian-Wen, YAO Su, OUYANG Zhuang, WEI Cheng-Yang. Voltammetric Sensor Based on β-Cyclodextrin-Carbon Nanosheets Modified Electrode for Rapid Determination of Sulfadiazine[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(5): 773-779. doi: 10.11895/j.issn.0253-3820.171108 shu

Voltammetric Sensor Based on β-Cyclodextrin-Carbon Nanosheets Modified Electrode for Rapid Determination of Sulfadiazine

¹ Faculty of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China;
² Guangdong Food and Drug Vocational College, Guangzhou 510620, China;
³ Institute of Zhaoqing Quality Supervision and Inspection, Zhaoqing 526070, China

Received Date: 9 July 2017
Revised Date: 2 March 2018

Carbon nanosheets load beta-cyclodextrin (β-CD-CNS) as a new modified electrode materials was reported for the electrochemical determination of sulfadiazine (SD). Carbon nanosheets (CNS) were prepared by a new method of ultrasonic electrolysis in which the β-CD was attached on CNS through ultrasonic dispersion method. The β-CD-CNS composite nanomaterials were immobilized onto glassy carbon electrodes with drops of coating method to construct an SD voltammetric sensor. The differential pulse stripping voltammetry (DPSV) was used to characterize the electrocatalytic behavior of the developed sensor. The Effects of some parameters on the response behavior of the sensor such as pH, modification amount, scanning rate, stirring speed, stirring time, deposition potential and time were investigated and optimized. The results indicated that the β-CD-CNS composite nanomaterials had excellent electroactivity for the SD in neutral solution and greatly improved the current response of SD. Under the optimal conditions, the SD had an irreversible characteristic oxidation peak around +0.87 V, and the oxidation peak current ip (μA) had a good linear relationship with the concentration C (μmol/L) of the SD in concentration range of 0.05 μmol/L-13.5 μmol/L with correlation coefficients of 0.999. The detection limit was 12.2 nmol/L (S/N=3). The sensor was successfully applied for the trace SD determination in water and milk samples and the recoveries from the spiked samples were 80.0%-102% with RSD ≤ 5.2%.
- Sulfadiazine,
- Electrochemical detection,
- Carbon nanosheets,
- β-Cyclodextrin,
- Differential pulse stripping voltammetry
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