二酸化マンガン固定化膜を用いた過酸化水素センサの性質

概要

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Particles of MnO_2 were immobilized in poly vinyl chloride membrane. A hydrogen peroxide sensor(H_2O_2 sensor) was set up by attaching the MnO_2 - immobilized membrane to the top of a dissolved oxygen sensor. For comparison, H_2O_2 sensors using catalase were also set up, using catalase - immobilized membrane and particles respectively. First, the selectivity was examined of the H_2O_2 sensor using MnO_2 - immobilized membrane. Next, the concentration response characteristics of three kinds of H_2O_2 sensors was examined. The obtained results are summarized as follows. Steady response values of the H_2O_2 sensor using MnO_2 - immobilized membrane for each oxygen compound solution were remarkably smaller than steady response values for H_2O_2 solution of the concentration of about 1/100, and they could be approximately negligible. All the three kinds of response speed of H_2O_2 sensors for H_2O_2 solution were approximately equal. The three kinds of H_2O_2 sensors were able to measure H_2O_2 indifferent solutions. The H_2O_2 sensor using MnO_2 - immobilized membrane was stable in the widest range for pH and temperature of the three kinds of H_2O_2 sensors. The sensor using MnO_2 - immobilized membrane and catalase - immobilized particles showed a long - term stability.
2004-01-30