Chinese Journal of Applied Chemistry ›› 2019, Vol. 36 ›› Issue (7): 847-854.DOI: 10.11944/j.issn.1000-0518.2019.07.190047

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Hydrogen Peroxide and Glucose Sensitive Colorimetric Method Based on Deuterohemin-Ala His Thr Val Glu Lys

Xin SHI,Chuanzhi LIU,Ping GONG,wei LI,Yue HOU()   

  1. School of Life Science and Technology,Changchun University of Science and Technology,Changchun 130022,China
  • Received:2019-02-21 Accepted:2019-04-30 Published:2019-07-01 Online:2019-07-02
  • Contact: Yue HOU
  • Supported by:
    Supported by the Scientific and Technological Research Project Foundation of Jilin Provincial Science and Technology Department(No.20170204029SF)

Abstract:

A simple colorimetric method for determination of H2O2 and glucose was established based on the peroxidase-like activity of deuterohemin-Ala His Thr Val Glu Lys(DhHP-6) to catalyze the oxidation of 4-aminoantipyrine(4-APP)-chlorophenol color reaction system in the presence of H2O2. The effects of pH, substrate concentration and DhHP-6 concentration were observed, and the reaction linearity, stability, correlation and recovery rate of the colorimetric method were detected. Under optimal reaction conditions, the activity of DhHP-6 is superior to that of peroxidase(POD) under different temperatures and times; the Michaelis constant(Km) and maximum reaction rate(vmax) of DhHP-6 catalyzing H2O2 are 0.171 mmol/L and 4.22×10-6 mol/s, respectively; the linearity range of H2O2 response is 0.39~25.0 mmol/L, the coefficient of variation(CV) and spiked recovery of the high, medium and low levels are between 1.29%~2.16% and 94.5%~101.1%, respectively; and correlation coefficient with the commercial kit is 0.9946; the concentration of glucose in 36 blood samples are 4.26~17.48 mmol/L. There is no significant difference between the two sets of data for glucose assay kit(P>0.05). Therefore, this is a simple, cheap, convenient and sensitive colorimetric determination method.

Key words: hydrogen peroxide, deuterohemin-Ala His Thr Val Glu Lys, mimetic enzyme, colorimetric analysis