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Title
Verfahren und Vorrichtung zur Bestimmung eines Stroemungspotentials
Date Issued
1996
Author(s)
Koch, S.
Woias, P.
Patent No
1994-4442685
Abstract
A process and a device serve to determine the streaming potential, in particular to record the surface characteristics of a sample or to record a component contained in a sample fluid. The device comprises a flow section, a reference electrode which is in contact with the fluid, a first ion-sensitive field effect transistor which generates a first measuring signal, a second ion-sensitive field effect transistor which generates a second measuring signal and an evaluating device which determines the streaming potential from the difference of the measuring signals. The flow section to determine the surface characteristics of a sample is designed in such as way that fluid is caused to flow past the surface of a sample, or the flow section is designed to detect components contained in a sample fluid in such as way that a coating is provided at the section of the inner wall of the flow section, to which said coating components contained in the sample fluid can adhere.
Language
de
Patenprio
DE 1994-4442685 A: 19941130