Dry chemistry utilizes solid-state reagents in a dried form, typically impregnated onto a test strip or pad. These reagents are specific to the analyte being measured and are stable until they come into contact with a liquid sample.
Substrate
The substrate serves as the solid surface on which the reagents are immobilized. Common substrates include cellulose or other porous materials that facilitate the flow and interaction of the liquid sample with the reagents.
Reaction Chambers
These are designated areas on the test strip where the chemical reaction occurs between the reagents and the sample. The reaction chambers are carefully designed to optimize the reaction and generate a measurable signal.
Detection and Measurement System
Dry chemistry typically employs various detection methods, such as colorimetry or photometry, to measure the reaction between the sample and reagents. The detection system interprets the resulting color changes or other measurable indicators to quantify the analyte.
