The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 29, 2014
Filed:
Oct. 29, 2009
Yu Ishige, Tokyo, JP;
Masao Kamahori, Kokubunji, JP;
Kuniaki Nagamine, Sendai, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Provided is a potentiometric sensor chip in which the positional relationship among a reference electrode, a measurement electrode, and a sample inlet which enables measurement from the start of a reaction is defined, and further provided is a method for detecting the start time of the reaction. A very small amount of sample is measured with high accuracy. The very small quantity of sample is measured by a rate assay. When a reference electrode () is disposed between a sample inlet () and a measurement electrode (), a sample solution arrives at the reference electrode () earlier than at the measurement electrode (), whereby the surface potential of the measurement electrode () can be measured simultaneously when the sample solution arrives at the measurement electrode () and dissolves a reagent and thereby a reaction starts. The arrival of the sample solution at the measurement electrode () can be sensed by detecting the discontinuous change of the voltage observed by a voltmeter () at this time.