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  • 1
    Online Resource
    Online Resource
    Sensitive determination of uric acid at zinc layered hydroxide-sodium dodecyl sulphate-propoxur nanocomposites : Original scientific paper
    International Association of Physical Chemists (IAPC) ; 2022
    In:  Journal of Electrochemical Science and Engineering ( 2022-02-26)
    Details
    In: Journal of Electrochemical Science and Engineering, International Association of Physical Chemists (IAPC), ( 2022-02-26)
    Abstract: An electrochemical chemical sensor for determination of uric acid (UA) with highly sensitive and widely working range was fabricated using zinc layered hydroxide-sodium dodecyl sulphate-propoxur (ZLH-SDS-PRO) nanocomposites modified with multiwall carbon nanotubes (MWCNT). Introduction of the ZLH-SDS-PRO as a conducting matrix has enhanced the conductivity of MWCNT. The ZLH-SDS-PRO/MWCNT morphology was characterized by transmission electron microscopy (TEM) and scanning electron microscopy (SEM), meanwhile the electrochemical behaviour of UA and K3[Fe(CN)6] at ZLH-SDS-PRO/MWCNT paste electrode was studied by square wave voltammetry (SWV) and cyclic voltammetry (CV), respectively. Under the optimized experimental conditions, the electrode established linear plot for UA from 7.0 µmol/L to 0.7 mmol/L (R2 = 0.9920) and the LOD was calculated to be 4.28 µm ol/L (S/N = 3). The fabricated electrochemical electrode was successfully applied to urine samples and exhibit excellent stability and reproducibility, which made it worthwhile to be explored for analytical applications.
    Type of Medium: Online Resource
    ISSN: 1847-9286
    URL: Article
    DOI: 10.5599/jese.1237
    Language: Unknown
    Publisher: International Association of Physical Chemists (IAPC)
    Publication Date: 2022
    detail.hit.zdb_id: 2688382-X
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  • 2
    Online Resource
    Online Resource
    Electrochemical sensor of multiwalled carbon nanotube electrode modified by 1-phenyl-3-methyl-4-orthofluoro benzoyl-5-pyrazolone for sensing dopamine
    African Journals Online (AJOL) ; 2023
    In:  Bulletin of the Chemical Society of Ethiopia Vol. 37, No. 4 ( 2023-05-12), p. 845-857
    Details
    In: Bulletin of the Chemical Society of Ethiopia, African Journals Online (AJOL), Vol. 37, No. 4 ( 2023-05-12), p. 845-857
    Abstract: ABSTRACT. This work explicates a simple, rapid, and sensitive method for the electrochemical detection of dopamine (DOP) utilising 1-phenyl-3-methyl-4-orthofluorobenzoyl-5-pyrazolone (HPMoFBP)/multiwalled carbon nanotube (MWCNT) carbon paste electrode (CPE). The electrochemical behaviour of DOP was performed through cyclic voltammetry and square wave voltammetry. HPMoFBP/MWCNT showed a higher current at the lower potential for the oxidation of DOP compared to bare MWCNT. The sensor's improved electrocatalytic activity was observed to detect in a 1.0 x 10-1 M phosphate buffer saline (PBS) solution at pH 8.0. A good linear regression analysis was observed between electrical response and the concentration of DOP in the range of 1 to 1000 µM. Under optimized experimental conditions, 1.0 x 10-7 M has been determined as the limit of detection (LOD). The sensor has expressed considerable sensitivity towards DOP detection without interference and is successfully used to determine DOP in dopamine hydrochloride injection.   KEY WORDS: Electrochemical sensor, Dopamine, Pyrazolone, MWCNT, Voltammetry Bull. Chem. Soc. Ethiop. 2023, 37(4), 845-857.                                                             DOI: https://dx.doi.org/10.4314/bcse.v37i4.4
    Type of Medium: Online Resource
    ISSN: 1726-801X , 1011-3924
    URL: Article
    DOI: 10.4314/bcse.v37i4.4
    Language: Unknown
    Publisher: African Journals Online (AJOL)
    Publication Date: 2023
    detail.hit.zdb_id: 2097332-9
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