Zinc layered hydroxide-2(3-chlorophenoxy)propionate modified multi-walled carbon nanotubes paste electrode for the determination of nano-molar levels copper(II)

2014 ◽  
Vol 198 ◽  
pp. 243-248 ◽  
Author(s):  
Nur Indah Wardani ◽  
Illyas Md Isa ◽  
Norhayati Hashim ◽  
Sulaiman Ab Ghani
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotubes Paste Electrode ◽  
Multi Walled Carbon Nanotubes ◽  
Zinc Layered Hydroxide ◽  
Walled Carbon Nanotubes ◽  
Paste Electrode

scholarly journals Electrochemical Method for Ease Determination of Sodium Diclofenac Trace Levels in Water Using Graphene—Multi-Walled Carbon Nanotubes Paste Electrode

2021 ◽  
Vol 19 (1) ◽  
pp. 29
Author(s):  
Sorina Motoc ◽  
Florica Manea ◽  
Anamaria Baciu ◽  
Corina Orha ◽  
Aniela Pop
Keyword(s):  
Carbon Nanotubes ◽  
Limit Of Detection ◽  
Tap Water ◽  
Operating Conditions ◽  
Carbon Nanotubes Paste Electrode ◽  
Sodium Diclofenac ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Paste Electrode

Sodium diclofenac (DCF) presence reported in water use cycle at various concentrations including trace levels necessitates continuous development of advanced analytical method for its determination. In this work, ease electrochemical methods for DCF determination based on voltammetric and amperometric techniques were proposed using a simple combination of graphene with multi-walled carbon nanotubes as paste electrode. Integration of the graphene with multi-walled carbon nanotubes enlarged the electroactive surface area of the electrode and implicitly enhanced the electrochemical response for DCF determination. On the basis of the sorption autocatalytic effect manifested at low concentration of DCF, we found that the preconcentration step applied prior to differential-pulsed voltammetry (DPV) and multiple-pulsed amperometry (MPA) allowed for the enhancement of the electroanalytical performance of the DCF electrochemical detections, which were validated by testing in tap water. The lowest limit of detection (LOD) of 1.40 ng·L−1 was found using preconcentration prior to DPV under optimized operating conditions, which is better than that reached by other carbon-based electrodes reported in the literature.

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