Electrocatalytic performance of a zinc sulphide nanoparticles-modified carbon paste electrode for the simultaneous determination of acetaminophen, guanine and adenine†,Analytical Methods

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Electrocatalytic performance of a zinc sulphide nanoparticles-modified carbon paste electrode for the simultaneous determination of acetaminophen, guanine and adenine†
Analytical Methods ( IF 2.7 ) Pub Date : 2018-02-19 00:00:00 , DOI: 10.1039/c8ay00007g
Mallappa Mahanthappa _{1,

2,

3,

4,

5} , Nagaraju Kottam _{1,

4,

6,

7} , Shivaraj Yellappa _{1,

2,

3,

4}

Affiliation

The simultaneous electroanalysis of acetaminophen (AC), guanine (G) and adenine (A) was successfully achieved on the zinc sulphide nanoparticles-modified carbon paste electrode (ZnS NPs/CPE) in phosphate buffer solution (PBS). Zinc sulphide nanoparticles (ZnS NPs) were prepared through a simple co-precipitation method and characterized via various spectroscopic techniques. The detailed studies confirmed that the as-synthesized ZnS NPs grew as high-density crystalline structures and they exhibit good electrocatalytic properties. The proposed method is selective and sensitive toward the development of an electrochemical sensor. The modified electrode showed acceptable reproducibility and stability under optimal conditions with high-accessible surface area and antifouling properties. The as-synthesized ZnS NPs enhanced the oxidation peak current and reduced the peak potential of AC, G and A. Furthermore, the sensor showed two linear ranges over the concentration from 1 to 15 μM and 15 to 120 μM. Based on the calibration plot, the limit of detection (LOD) was calculated and found to be 0.041, 0.036 and 0.031 μM for AC, G and A, respectively.

中文翻译：

硫化锌纳米粒子修饰的碳糊电极同时测定对乙酰氨基酚，鸟嘌呤和腺嘌呤的电催化性能†

对乙酰氨基酚（AC），鸟嘌呤（G）和腺嘌呤（A）的同时电分析已在磷酸盐缓冲溶液（PBS）中的硫化锌纳米粒子修饰的碳糊电极（ZnS NPs / CPE）上成功实现。通过简单的共沉淀方法制备硫化锌纳米颗粒（ZnS NPs），并通过各种光谱技术。详细的研究证实，合成后的ZnS NPs以高密度的晶体结构生长，并且具有良好的电催化性能。所提出的方法是选择性的并且对电化学传感器的发展敏感。改性电极在最佳条件下显示出可接受的重现性和稳定性，并具有较高的表面积和防污性能。合成后的ZnS NPs增强了氧化峰值电流，降低了AC，G和A的峰值电势。此外，传感器在1至15μM和15至120μM的浓度范围内显示出两个线性范围。根据校准图，计算出检出限（LOD），对于AC，G和A，分别为0.041、0.036和0.031μM。

更新日期：2018-02-19

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