Molecularly imprinted polymer of p-amino thiophenol for a 3-monochloropropane-1,2-diol impedance-based sensor

Imia R. Banurea, Afiten R. Sanjaya, Noverra M. Nizardo, Tribidasari A. Ivandini

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


A sensor of 3-monochloropropane-1,2-diol (3-MCPD) has been developed using molecularly imprinted polymer (MIP) technique. The sensor was prepared from graphite pencil electrodes modified with gold particles and polymer of p-amino thiophenol as the membrane to form a self-assembled MIP with 3-MCPD. The signal of the sensor was obtained using electrochemical impedance spectroscopy calculated by the difference resistances before and after interaction between the sensor and 3-MCPD. A linear calibration curve was obtained in the 3-MCPD concentration range 0.12–1.11 ppm. The estimated limits of detection and quantification of 0.12 ppm and 0.39 ppm, respectively, could be achieved. Good stability of the responses was shown with a relative standard deviation of 4.44% (n = 9) for signals repeatability in the same day and 4.20% in the different days, while it was 5.62% (n = 7) for reproducibility. The developed sensor also showed excellent selectivity for the interferences of 2-MCPD, glycerol, palmitic acid, vitamin A, and β-carotene. Furthermore, an example application of the sensor for the detection of 3-MCPD in real cooking oil samples was also successfully demonstrated, indicating the developed sensor is promising for real applications of 3-MCPD detection.

Original languageEnglish
Article number127613
JournalMaterials Chemistry and Physics
Publication statusPublished - 1 Jun 2023


  • 3-monochloropropane-1,2-diol
  • Electrochemical impedance spectroscopy
  • Molecularly imprinted polymer
  • P-amino thiophenol
  • Pencil graphite electrode


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