A total of 31 contaminants were desorbed from one or more of the five SSAS tubes exposed during the mission. The collective toxicity potential of the chemicals found in the cabin air was estimated by adding each ratio of compound concentration to a 7-day spacecraft maximum allowable concentration (SMAC). Based on the analysis of the atmospheric samples collected on STS-37, the air was deemed toxicologically safe for crewmembers to breathe throughout the mission.
A total of 108 chemical contaminants were desorbed from one or more of the six SSAS tubes exposed during the mission. Analysis of orbiter and Spacelab atmospheric samples collected throughout the mission showed the air was generally safe to breathe. The only exception was the air quality degradation caused by the Orbiter Refrigerator/Freezer (OR/F) malfunction. Odors and symptoms reported by the crewmembers during the malfunction, as well as postflight failure analysis of the OR/F, indicated that while the SSAS was in the middeck area early in the mission, crewmembers were temporarily exposed to harmful concentrations of thermodegradation products.
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