Abstract
An ion-selective field effect transistor (ISFET) was applied as a potentiometric detector in liquid chromatography (LC) for the determination of organic acids. The ISFET was prepared by coating the gate insulator of the encapsulated transistor with a poly(vinyl chloride) (PVC) matrix membrane containing methyltridodecylammoniumchloride, which enables the detection of organic anions. The ISFET was tested for its applicability as detector for carboxylic acids in ion-exchange and reversed-phase chromatography. Its analytical characteristics were compared to those of a coated-wire electrode (CWE) and of a conventional type of ion-selective electrode (ISE).
Original language | English |
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Pages (from-to) | 194-299 |
Number of pages | 6 |
Journal | Sensors and Actuators B: Chemical |
Volume | 67 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2000 |