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Highly sensitive and disposable electrochemical nano sensor for simultaneous analysis of caffeic acid and uric acid based on halloysite nanotubes and magnetite nanoparticles

Microchemical Journal, ISSN: 0026-265X, Vol: 181, Page: 107695
2022
  • 8
    Citations
  • 0
    Usage
  • 18
    Captures
  • 0
    Mentions
  • 17
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    8
    • Citation Indexes
      8
  • Captures
    18
  • Social Media
    17
    • Shares, Likes & Comments
      17
      • Facebook
        17

Article Description

Simultaneous quantitative analysis of caffeic acid (CAFA) and uric acid (UA) in biological samples was carried out using a pencil graphite electrode (PGE) coated with a mixture of halloysite (a clay mineral) nanotubes (HNTs) and magnetite (Fe 3 O 4 ) nanoparticles. Surface morphology and electrochemical characterization of the sensor were investigated by field emission scanning electron microscopy (FE-SEM), Energy dispersive X-ray analysis (EDX), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The sensor prepared has an effective surface area 1.75 times larger than that of the corresponding bare PGE electrode. Oxidation peak currents for CAFA and UA obtained by the sensor increased by 1.4 and 2.0 times, respectively, compared to the values found with bare PGE. Under the optimal conditions, linear working ranges for CAFA and UA were found in the ranges (0.027–70.0 µM) and (0.009–70.0 µM), respectively. The respective detection limits were 0.008 µM and 0.003 µM. The sensor developed was shown to be applicable to quantifying the analytes simultaneously in human serum and urine.

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