Journal
MICROCHIMICA ACTA
Volume 186, Issue 11, Pages -Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-019-3860-4
Keywords
Silver-argentous oxide nanoparticles; MWCNTs; Histamine; Electrochemical sensing
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Funding
- Rajamangala University of Technology Isan [NKR2562REV044]
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A glassy carbon electrode (GCE) was modified with a nanocomposite consisting of multiwalled carbon nanotubes (MWCNTs) loaded with silver-argentous oxide nanoparticles (Ag-Ag2O). The electrode is shown as a viable tool for sensing histamine using differential pulse voltammetry (DPV). The modified GCE, best operated at a potential of 0.97 V (vs. Ag/AgCl) shows higher electrocatalytic activity compared to GCEs modified with MWCNTs or Ag-Ag2O only. Under the optimum conditions, the detection limit is 2 mu gL(-1) (0.18 mu M) and the response is linear in the 5 mgL(-1) to 200 mgL(-1) histamine concentration range. Sodium chloride, putrescine and cadaverine, commonly present in biological samples and foods, do not interfere. Other performance features include good recoveries, fabrication reproducibility and operational/storage stability. The modified GCE was applied for determination of histamine in fish sauce samples.
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