Personal Use Colorimetric Fumigant Sensors
Colorimetric Wearable Paper-based Cheap Rapid and Sensitive Detection at levels below PEL
Fumigant and gaseous toxic chemical detector
Detection of fumigants, or dilute toxic chemicals widely used in agriculture and soil, have high vapor pressures, allowing them to easily escape from the soil to the atmosphere, posing a concern to health. Current detection methods include the use of detector tubes which are effective but deteriorate with wage, are temperature and light sensitive, and cross-sensitive to gases other than those for which they are designed. Other methods include infra-red analyzers which, although sensitive and robust, are very expensive. There is a need for a sensor that is cheap, rapid, sensitive, and easy to use. Researchers at the University of California, Davis have developed highly sensitive, wearable and disposable colorimetric sensors for rapid detection of fumigants below their corresponding permissible exposure levels (PEL) in air. This new approach uses glutathione based reactions to detect several fumigants simultaneously, making it more efficient than previous methods. This same reaction also provides the capability to fabricate sensors selective to different fumigants. The sensors have already been used and were successfully able to detect methyl isocyanate (MITC), chloropicrin, 1,3-dichloropropene (1,3-D), sulfuryl fluoride, and methyl Iodide (MeI) at levels lower than the PEL of each chemical respectively.
Additional Technologies by these Inventors Tech ID/UC Case 27575/2017-736-0 Related Cases 2017-736-0
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