ThreatID: Gas Module
Gases present the greatest danger, but until now there have been few easy-to-use techniques to identify them with chemical analyzers. Gases absorb infrared light just as solids/liquids do. But the way a gas sample presents itself determines the sampling technique one would utilize.
Dilute samples require more volume to fill the gas cell. The more volatile compounds will tend to move into the gas phase (or headspace) above the liquid sample.
Headspace essentially is a separation technique in which volatile material may be extracted from a heavier sample matrix and injected into the gas module for analysis.
Only about 1mL of headspace from volatile liquids is needed to collect a good identification sample. When there is a gas leak that doesn’t have a liquid source or isn’t visible, one would need to collect up to 500mL of sample.
Primary Search: Provides the closest match to the entire sample. This works best with pure materials, consumer products, and mixtures.
Automated Mixture Search: The list of materials that most closely match the sample when added together. Each material is featured with a sum of components shown with a relative contribution to the overall mixture. If you have a gas phase mixture this is a way to pull apart the individual so you can see the hazards of the individual components.
Functional Group Analysis: Confirm a library hit to gain confidence and back up the results that your search has provided. Confirm another material is not present and seek general information about each functional group
See the ThreatID Identify Unknown Gases
The innovative ThreatID quickly identifies unknown threats providing the information you need to address any hazardous chemical situation, which increases both responder and community safety.
In the following video, RedWave Technology demonstrates how the ThreatID can be utilized in sampling an unknown gas to simulate in-field situations that a responder would face.
Whether a situation is dangerous or innocuous, the onboard chemical identifier ThreatAssist is always present on the system. The data collection hit allows us to visually determine the associated hazards of what chemicals or mixture components are present.