25-08-2017, 09:32 PM
Introduction to Biosensors
biosensor.ppt (Size: 1.2 MB / Downloads: 64)
Definition of a biosensor
A biosensor:
A device that uses specific biochemical reactions mediated by isolated enzymes, immunosystems, tissues, organelles or whole cells to detect chemical compounds usually by electrical, thermal or optical signals. Source:
PAC, 1992, 64, 148 (Glossary for chemists of terms used in biotechnology.)
Common signal error sources
Inhomogenous sample
Bubbles/flow artifacts
Temperature
Electromagnetic interferance
Electronic unstability
Unstable chip/detection layer
Signal interpretation
Visual (example pregnancy test)
Automatic (Software)
Manual (Research Biosensor)