Measuring device with electrodes fabricated on porous membrane substrate in whole
First Claim
1. 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.
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Abstract
The present invention relates to a measuring device which comprises electrodes fabricated on porous membrane substrate in which the sample migrates chromatographically; and the method of quantifying material in the sample by using the device. The sample material for measuring can be quantified by the measuring device of this invention, which is consists pretreatment bands in the lower part of porous membrane substrate and electrodes in the upper prt of pretreatment bands, by the procedure as foolows: The sample material for measuring is chromatographically migrated in the porous membrane substrate by applying the sample on the lower part of the porous membrane substrate; and then the changes of electric signal by the material at the electrode are measured to quantify the material. The analyzing method using the measuring device of this invention has merits that no additional preparation of the sample is needed, simple analyzing process, quantitative analysis of the material in a short time, and the economical efficiency because of the dispensability of skilled personnel due to easy manipulation.
51 Citations
15 Claims
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1. 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- pretreatment bands constructed in the lower part of the porous membrane substrate; and
Specification