A low cost, disposable, ambient temperature colorimetric sensor array for detection and identification of eight toxic gases

摘要

The present invention relates to simple, fast, disposable and low cost method for sensing and identifying eight different toxic gases/vapors at ambient condition/ temperature made by using Colorimetric Sensing Array (CSA). The eight target gases considered of this invention are H2S, N2H4, NH3, NO2, Cl2, HC1, HF, and HNO3. The dots of chemo-responsive materials deposited on CSA strip are environmental friendly, do not degrade with time and works efficiently at any ambient temperature. The particular change in color coding of CSA gives the precise identification of typical toxic gas around it. Present invention does not require any expensive or specialized materials and equipments. The CSA can be made on any type of substrate, which does not react with the chosen solvents. These properties make present invention, very attractive for commercial applications for detecting and identifying hazardous toxic gases.