Patent ID: 8430999
Filing Date: 2013-04-30
Classification: G01N

Abstract:
1. An analytical tool comprising a flow path for moving a sample introduced through a sample introduction port, and a working electrode and a counter electrode for applying a voltage to the sample supplied to the flow path, each of the working electrode and the counter electrode including a contact end for external connection to an analytical apparatus and an active region for coming into contact with the sample; wherein the active region of one of the working electrode and the counter electrode includes a first active portion and a second active portion divided within the flow path, the first and second active portions of said one electrode being located farther from the sample introduction port than the active region of the other of the working electrode and the counter electrode; wherein the second active portion of said one electrode is electrically separated from the first active portion of said one electrode and from the active portion of said other electrode without supply of the sample, the first active portion and the second active portion being electrically connected to each other only via a liquid junction formed by the sample for common electrical connection to the contact end of said one electrode; and wherein said one electrode includes an additional active portion located closer to the sample introduction port than the first and second active portions of said one electrode, the additional active portion of said one electrode being electrically connected to the second active portion of said one electrode without supply of the sample, the additional active portion of said one electrode being electrically separated from the first active portion and contact end of said one electrode without supply of the sample.