Polyurethane Application to Transform Screen-Printed Electrode for Rapid Identification of Histamine Isolated from Fish

Figure 4

(a) The FTIR spectrum of the MIP film. (b) The voltammograms of DPV after analyzing histamine in various concentrations (1–1000 nmol) in PBS (100 mmol·L⁻¹) at pH 7 on NIP/SPE/PU/LiClO₄. (c) The voltammograms of DPV after analyzing histamine (1–50 nmol) in various concentrations in PBS (100 mmol·L⁻¹) at pH 7 on MIP/SPE/PU/LiClO₄. (d) Calibration curves of NIP/SPE/PU/LiClO₄ and MIP/SPE/PU/LiClO₄ between the current (µA) and concentration (nmol·L⁻¹) in various histamine concentrations (1–1000 nmol·L⁻¹).

(a)

(b)

(c)

(d)