Comparative Study on Electroanalysis of Fenthion Using Silver Amalgam Film Electrode and Glassy Carbon Electrode Modified with Reduced Graphene Oxide

Abstract

Oxidation and reduction processes of the insecticide fenthion was comparatively investigated at a reduced graphene oxide modified glassy carbon electrode (RGO‐GCE) and a cyclic renewable silver amalgam film electrode (Hg(Ag)FE) using square wave stripping voltammetry (SWSV). The influence of pH and SW parameters was investigated. The linear concentration ranges were found to be 1 × 10−6 – 2 × 10−5 and 1 × 10−7 – 2 × 10−5 mol L−1 for Hg(Ag)FE and RGO‐GCE, respectively. The detection and quantification limits were calculated as 1.3 × 10−7 and 4.5 × 10−7 mol L−1 for Hg(Ag)FE and 7.6 × 10−9 and 2.5 × 10−8 mol L−1 for RGO‐GCE. Both of the developed electroanalytical methods offer rapid and simple detection of fenthion and were used on spiked tap and river water and apple juice samples. Scanning electron microscopy was used for RGO‐GCE surface characterization.

Lactofen – Electrochemical Sensing and Interaction with dsDNA

“…The evaluated detection and quantitation limits were 0.28 mM and 0.95 mM, respectively. As these result were unsatisfactory (due to high LOD, LOQ values and narrow linear concentration range) and introduction of stripping step did not give any improvement, we decided to check whether better analytical characteristics might be obtained with the silver amalgam film electrode, as many literature positions report excellent usefulness of this electrode in biologically active compounds determination [1,[19][20][21].…”

“…Therefore, the demand for methods of determination and monitoring of hazardous compounds in environmental samples and for studies of their interaction with important biological molecules, such as DNA, is increasing. Electrochemical techniques offer inexpensive methods for environmental analysis [1][2][3]. There are several methods for the investigation of interaction between DNA and organic compounds [4][5][6][7].…”

Analytical Performance of Clay Paste Electrode and Graphene Paste Electrode-Comparative Study

“…The performance of chemically modified carbon paste electrodes depends on the properties of the modifier, which affect the selectivity of the electrodes, kinetics of an electrochemical reaction, and sometimes even the electrode reaction product [ 13 , 14 ]. Nowadays, graphene and its derivatives are one of the most popular working electrodes modifiers used in electrochemical studies [ 15 , 16 , 17 , 18 , 19 ]. Graphene is a two-dimensional, sp 2 hybridized carbon sheet, where atoms are arranged in a honeycomb-shaped lattice [ 20 , 21 ].…”

Preparation of a New Copper/Mercury‐Based Amalgam Electrode with Minimal Mercury Content and Its Application for the Determination of Azathioprine in Biological Fluids

“…These electrodes are solid, small and have lower mercury content and at the same time, many properties of the mercury drop electrode have been retained. Various types of metals with varying percentages are used to make these electrodes [26–29] . The most common type of these electrodes is obtained by mixing various powdered metals such as gold, silver, copper, and platinum with mercury [30,31] .…”