Simultaneous clean-up and determination of Cu(II), Pb(II) and Cr(III) in real water and food samples using a magnetic dispersive solid phase microextraction and differential pulse voltammetry with a green and novel modified glassy carbon electrode

2019 ◽  
Vol 147 ◽  
pp. 545-554 ◽  
Author(s):  
Mahdi Ghorbani ◽  
Toktam Pedramrad ◽  
Mohsen Aghamohammadhasan ◽  
Orkideh Seyedin ◽  
Hossien Akhlaghi ◽  
...  
Keyword(s):  
Differential Pulse Voltammetry ◽  
Glassy Carbon ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Differential Pulse ◽  
Food Samples ◽  
Carbon Electrode ◽  
Modified Glassy Carbon Electrode ◽  
Pulse Voltammetry

Voltammetric Determination of Guaifenesin in Pharmaceuticals and Urine Samples Based on Poly(Bromocresol Purple) Modified Glassy Carbon Electrode

2020 ◽  
Vol 16 (5) ◽  
pp. 633-639
Author(s):  
Fatma Ağın
Keyword(s):  
Differential Pulse Voltammetry ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Differential Pulse ◽  
Urine Samples ◽  
Bromocresol Purple ◽  
Carbon Electrode ◽  
Modified Glassy Carbon Electrode ◽  
Pulse Voltammetry

Introduction: The electro-oxidation behavior of expectorant drug Guaifenesin (GUF) was studied on poly(bromocresol purple) modified Glassy Carbon Electrode (GCE) by Cyclic Voltammetry (CV) and Differential Pulse Voltammetry (DPV) methods. Materials and Methods: GCE was modified with electropolymerization of Bromocresol Purple (BP) monomer for sensitive determination of GUF with voltammetric methods. The oxidation process of GUF showed irreversible and diffusion controlled behavior. The linearity has been obtained in the range from 1.00 × 10-7 to 2.00 × 10-5 M with the limit of detection 3.658 × 10-9 M for DPV in 0.1 M phosphate buffer solution (PBS) at pH 3.0. Results and Conclusion: Fully validated differential pulse voltammetry was successfully applied for the determination of GUF in pharmaceutical dosage forms and urine samples obtained satisfying results.

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