Patent ID: 6210907
Filing Date: 2001-04-03
Classification: C12Q,G01N,Y10S

Abstract:
A measuring device which comprises a porous membrane substrate having a lower part, center part, and upper part in which a sample can migrate chromatographically from the lower part in the direction of the upper part; pretreatment bands constructed in the lower part of the porous membrane substrate; and electrodes constructed in the upper part of the porous membrane substrate, the electrodes comprise a working electrode, a counter electrode and a reference electrode, and a connection pad for connecting the electrodes with a circuit electrometer and having an insulating layer which prevents short circuit of the electrodes, wherein the porous membrane substrate is selected from the group consisting of nitrocellulose paper, filter paper, organic polymers comprising a hydrophilic polymer, and inorganic polymers comprising a hygroscopic ceramic and has first and second insulating layers provided in the center part and the lower part of the porous membrane substrate, respectively; the pretreatment bands comprise (1) a layer for removing interferents, (2) a layer for converting a sample material to be detected by the electrodes, and (3) a layer for detecting the sample material by the electrodes by at least one of controlling the pH and dispersing the sample material to be detected.