| 摘要 |
The sensor comprises an ion-sensitive electrode ("ISE") 2, 3 and a reference electrode 4, 5, 6 in combination with a permeable barrier 8 enclosing the ISE - and preferably enclosing both electrodes - to interface with samples under examination so that the sample itself no longer provides the main bridging contact between the ISE and reference electrode to complete the measuring circuit. The permeable barrier controls diffusion of analyte and impurities and preferably may also be selective. Diffusion can be controlled to regulate flow of components in either direction through the barrier. Various forms are described which can facilitate more rapid identification of the analyte content in a sample. |
