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<p>In this study, we developed a sensing platform for the simultaneous determination of norepinephrine and tyrosine. This was achieved using COOH-functionalized multi-walled carbon nanotubes (COOH-f-MWCNTs) combined with a bimetallic leaf-like zeolitic imidazolate framework (ZnCo-ZIF-L)-modified carbon paste electrode (CPE). The COOH-f-MWCNTs/ZnCo-ZIF-L/CPE sensing platform demonstrated a broad linear detection range of 0.01–800.0&#xa0;μM and a low limit of detection of 0.0036&#xa0;μM for norepinephrine. Additionally, the sensor effectively facilitated the simultaneous determination of norepinephrine and tyrosine using DPV. The developed sensing platform has been successfully used to determine norepinephrine and tyrosine in different samples (norepinephrine ampoule and urine), which provides promising potential in real-time monitoring.</p> Graphical Abstract <p></p>

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Sensitive electrochemical sensor for determination of norepinephrine in the presence of tyrosine using COOH-MWCNTs/ZnCo-ZIF-L via an enhancement effect

  • 期刊论文

  • 发表日期：

    2026年1月2日

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  • Ahlam Bazrafkan,
  • Reza Zaimbashi,
  • Fariba Garkani Nejad,
  • Hadi Beitollahi

摘要

In this study, we developed a sensing platform for the simultaneous determination of norepinephrine and tyrosine. This was achieved using COOH-functionalized multi-walled carbon nanotubes (COOH-f-MWCNTs) combined with a bimetallic leaf-like zeolitic imidazolate framework (ZnCo-ZIF-L)-modified carbon paste electrode (CPE). The COOH-f-MWCNTs/ZnCo-ZIF-L/CPE sensing platform demonstrated a broad linear detection range of 0.01–800.0 μM and a low limit of detection of 0.0036 μM for norepinephrine. Additionally, the sensor effectively facilitated the simultaneous determination of norepinephrine and tyrosine using DPV. The developed sensing platform has been successfully used to determine norepinephrine and tyrosine in different samples (norepinephrine ampoule and urine), which provides promising potential in real-time monitoring.

Graphical Abstract