Flow injection analysis using ion-sensitive field effect transistors

Abstract

A miniaturized flow injection system yields an instant readout and requires microlitre volumes of sample and reagent solutions. Using electrode measurement as an example it is shown that the difference between discrete assays and continuous monitoring becomes so small that the same apparatus will eventually perform both functions.

Key words:

• continuous flow analysis
• nonsegmented streams
• sample injection
• pCa
• pH
• membrane electrodes
• critical patient care