Chinese Journal of Applied Chemistry

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Preparation and Characterization of Sudan Ⅰ-imprinted Surface Plasmon Resonance Sensor

ZHOU Chunyan, CHEN Changbao, LI Jie, SUI Hongguang, GAO Jigang*, ZHOU Jie*   

  1. (College of Chemistry and Material Science,Shandong Agricultural University,Taian 271018,China)
  • Received:2013-11-15 Revised:2014-01-08 Published:2014-09-03 Online:2014-09-03

Abstract: Based on the Sudan Ⅰ-responsive shrinkage of the Sudan Ⅰ-imprinted gel film, a new imprinted gel-surface plasmon resonance(SPR) sensor for the detection of Sudan I was prepared. The Sudan I-imprinted soft gel film was synthesized on the surface of a SPR chip. The SPR sensor was characterized with an electrochemical method and swelling measurements. The method exhibits a linear response in the range of 8.0×10-10 to 1.0×10-8 mol/L(R2=0.9987) for the detection of Sudan Ⅰ. It was used to determine Sudan I in the paprika and salted products. The detection limits are 3.4×10-10 mol/L and 2.5×10-10 mol/L, respectively, and the relative standard deviations(RSD) are 1.38% and 2.10% for two paprika samples and 1.13% for the salted product. This SPR sensor shows high sensitivity and good reproducibility.

Key words: molecularly imprinted gel film, surface plasmon resonance sensor, Sudan Ⅰ

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