Publication: A new electrochemical paper platform for detection of 8-hydroxyquinoline in cosmetics using a cobalt phthalocyanine-modified screen-printed carbon electrode
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Issued Date
2019
Resource Type
File Type
application/pdf
ISSN
15726657
Other identifier(s)
2-s2.0-85058175798
Rights Holder(s)
Scopus
Bibliographic Citation
Journal of Electroanalytical Chemistry. Vol 832, (2019), p.480-485
Suggested Citation
Nantaphol S., Jesadabundit W., Chailapakul O., Siangproh W. A new electrochemical paper platform for detection of 8-hydroxyquinoline in cosmetics using a cobalt phthalocyanine-modified screen-printed carbon electrode. Journal of Electroanalytical Chemistry. Vol 832, (2019), p.480-485. doi:10.1016/j.jelechem.2018.11.055 Retrieved from: https://hdl.handle.net/20.500.14740/5604
Abstract
An electrochemical paper-based analytical device (ePAD) using an electrocatalytic cobalt(II) phthalocyanine-modified screen-printed carbon electrode (CoPc-SPCE) was first developed for the determination of 8-hydroxyquinoline (8-HQ). The electrochemical behavior of 8-HQ on the CoPc-modified electrode was investigated by cyclic voltammetry (CV) and square-wave voltammetry (SWV). The obtained results demonstrated that the CoPc-SPCE shows high electrocatalytic activity toward the oxidation of 8-HQ. The oxidation potential was shifted to a negative value compared to those obtained from the unmodified electrode. Under the optimized experimental conditions, a good linear relationship between the 8-HQ concentration and the peak current was obtained within the range of 10–250 μM with a detection limit of 0.89 μM. Furthermore, the method was successfully applied for the determination of 8-HQ in cosmetic samples. According to a paired t-test, the results were in good agreement with results from the standard HPLC-UV method. The benefits of this proposed device are that it is easily fabricated, low cost, disposable, highly sensitive and reproducible. © 2018 Elsevier B.V.