Simultaneously determination of bisphenol a and uric acid by zinc/aluminum-layered double hydroxide 2(2,4-dichlorophenoxy) propionate paste electrode
The purpose of this study was to determine simultaneously of bisphenol A and uric acid byzinc/aluminium-layered double hydroxide 2(2,4-dichlorophenoxy)propionate paste electrode. Themorphology of the electrode materials was performed by using scanning electron microscopy and transmission electro...
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| Format: | thesis |
| Language: | eng |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://ir.upsi.edu.my/detailsg.php?det=6671 |
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| Summary: | The purpose of this study was to determine simultaneously of bisphenol A and uric acid byzinc/aluminium-layered double hydroxide 2(2,4-dichlorophenoxy)propionate paste electrode. Themorphology of the electrode materials was performed by using scanning electron microscopy and transmission electron microscopy. The electrochemical performance of modified pasteelectrode was studied by using cyclic voltammetry, square wave voltammetry, electrochemicalimpedance spectroscopy and chronocoulometry. Special importance effecting sensitivity andselectivity of the modified electrode must evaluated via optimization conditions which includeeffect of modifier composition percentage (15%), types of supporting electrolyte (PBS), pH ofelectrolyte (6.0) and square wave voltammetry parameters that encompassed of frequency(180Hz), pulse size (80mV) and step increment (7mV). The square wave voltammetry studies at anapplied potential of -0.30 V to + 1.0V, showed fast response within 1 second and detectedat high sensitivity. The modified sensor had showed a linear range from 5.0 M to 0.7 mM withdetection limit of 0.871 M and 0.795 M for bisphenol A and uric acid, respectively. Themodified sensors also exhibited good anti-interferences towards nitrate, chloride, sulphate, captopril, phthaldialdehyde, aspartic acid, glycine and fructose. In conclusion,the modified electrodes have been developed are able to detect bisphenol A and uricacid. By implication, the electrodes have been developed can be used as a suitable alternative forthe determination of bisphenol A and uric acid because it has characteristics suchas high sensitivity, reproducibility, repeatability and stability. |
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