Chem. J. Chinese Universities ›› 2004, Vol. 25 ›› Issue (7): 1257.

• Articles • Previous Articles     Next Articles

Application of Capillary Enzyme Column Enhancd by Using Nanoparticles for Glucose Biosensor Based on Liquid Droplets

FENG Feng1,2, WANG Ke-Min1, CHEN Qi-Ting1, XIANG Qiu-Fen1, CHEN Ze-Zhong1,2, HUANG Hong-Mei1, HUANG Shan-Sheng1, HUO Xi-Qin1   

  1. 1. State Key Lab of Chem-Biological Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China;
    2. Department of Chemistry, Shanxi Yanbei Normal Institute, Datong 037000, China
  • Received:2003-05-05 Online:2004-07-24 Published:2004-07-24

Abstract: An effective and fast method for assay of micro-amounts of glucose was set up. A new technique for preparation of enzyme columns based on enzyme immobilization by sol-gel was investigated. Glucose oxidase(GOD) and horseradish peroxidase(HRP) mixed with SiO2 nanoparticles and polyvinyl butyral(PVB) medium were immobilized on the surface of capillary tube, respectively. The experimental results show that nanoparticles can significantly enhance the catalytic activity of immobilized enzyme. Based on GOD column and HRP column, a liquid droplet sensor was developed for the determination of glucose solution. The effect of separated columns and mixed columns on the response of glucose sensor was investigated. The sensor showed a linear response in a range of 2-400 ng/mL with a detection limit of 0.3 ng/mL under the optimum conditions. The characteristics of the sensor including effect of flow-rate, pH and temperature were discussed.

Key words: Nanoparticle, Capillary enzyme column, Liquid drop sensor, Fluorometry

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