Please use this identifier to cite or link to this item:
http://archive.cmb.ac.lk:8080/xmlui/handle/70130/6234
Title: | Low Cost Paper-based Electrochemical Sensing Platform for the Determination of Hydrogen Peroxide |
Authors: | Kaumal, M. N. Perera, L Hasini R Nissanka, N. A. A. Buddhini |
Keywords: | low-cost device H2O2 detection paper-based device electrochemical device modified graphite-based electrode |
Issue Date: | 2021 |
Publisher: | King Mongkut's Institute of Technology Ladkrabang (KMITL), Thailand |
Abstract: | A rapid, precise, low cost, selective and sensitive paper-based
electrochemical device for the determination of H2O2 in milk is
described here. Commercially available varnish and a simple hand
drawing method were used to develop the hydrophobic pattern to
generate a hydrophilic detection zone on the filter paper. The
electrode system was fabricated on the detection zone in order to
detect H2O2 electrochemically. A commercially available graphite
pencil and conductive silver ink were used to fabricate the counter
electrode and pseudo-reference electrode, respectively. A paste of
Prussian blue (PB) modified graphite, unmodified graphite and
phenol-formaldehyde polymer were used to fabricate a PB modified
graphite working electrode on paper. This modified electrode
showed electrocatalytic activity towards the reduction of H2O2 and
it was successfully used for the chronoamperometric detection of
H2O2 at 0 V vs Ag reference electrode in 0.1 mol l
-1 phosphate
buffer, buffered at pH 6.0 in 0.1 mol l
-1 KCl. Under optimum
conditions, the calibration curve for the H2O2 determination was
linear from 5 to 50 mmol l
-1 with a detection limit (LoD = 𝑥̅+ 3SD)
of 4.0 mmol l
-1
. In addition, the PB modified graphite electrode
showed selectivity for H2O2 detection in the presence of ascorbic
acid, sucrose and citric acid. Abstract A rapid, precise, low cost, selective and sensitive paper-based electrochemical device for the determination of H2O2 in milk is described here. Commercially available varnish and a simple hand drawing method were used to develop the hydrophobic pattern to generate a hydrophilic detection zone on the filter paper. The electrode system was fabricated on the detection zone in order to detect H2O2 electrochemically. A commercially available graphite pencil and conductive silver ink were used to fabricate the counter electrode and pseudo-reference electrode, respectively. A paste of Prussian blue (PB) modified graphite, unmodified graphite and phenol-formaldehyde polymer were used to fabricate a PB modified graphite working electrode on paper. This modified electrode showed electrocatalytic activity towards the reduction of H2O2 and it was successfully used for the chronoamperometric detection of H2O2 at 0 V vs Ag reference electrode in 0.1 mol l -1 phosphate buffer, buffered at pH 6.0 in 0.1 mol l -1 KCl. Under optimum conditions, the calibration curve for the H2O2 determination was linear from 5 to 50 mmol l -1 with a detection limit (LoD = 𝑥̅+ 3SD) of 4.0 mmol l -1 . In addition, the PB modified graphite electrode showed selectivity for H2O2 detection in the presence of ascorbic acid, sucrose and citric acid. |
URI: | http://archive.cmb.ac.lk:8080/xmlui/handle/70130/6234 |
ISSN: | 2586-9396 (Online) |
Appears in Collections: | Department of Chemistry |
Files in This Item:
File | Description | Size | Format | |
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251624-Article Text-888639-1-10-20210721.pdf | 353.74 kB | Adobe PDF | View/Open |
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