The present invention discloses a method for determining
pefloxacin in food. The portable sensor consists of a Th-Cu-MOF / MWCNTs / SPCE (
thiourea-doped
copper-based
metal-organic framework / multi-walled carbon nanotubes / screen-printed carbon
electrode)
electrode, a portable electrochemical
workstation, an
electrolytic cell and a
smart phone.
Sodium dodecyl
benzene sulfonate (SDBS) is added to the
electrolytic cell containing the
electrolyte solution, which can significantly improve the enrichment efficiency of
pefloxacin on the
electrode, thus realizing the efficient determination of
pefloxacin. One end of the electrode is inserted into the interface of the portable
workstation, and the other end is immersed in the
electrolytic cell solution. A portable electrochemical sensor is constructed by connecting to the
smart phone via
Bluetooth. This method has the characteristics of simple preparation, convenient and
rapid detection, easy to carry, high
mass transfer efficiency, low
detection limit and strong anti-interference ability, and can be applied to on-site
rapid detection and realize
wireless intelligent analysis of trace residues of pefloxacin in food.