The main initial application area for the proposed gas chromatograph mass spectrometer for ISRU plants will be in NASA's future missions to Mars and the Moon, as well as other bodies such as Near Earth objects (NEOs). Long-duration missions to the Moon will need substantial amounts of resources for life support and energy. Martian sample return missions and manned missions to Mars may be prohibitively expensive, technically exigent, and unacceptably risky unless resources can be produced on Mars. An ISRU propellant production plant on Mars may be needed for the sample return mission that NASA is envisioning in the 2020s. The primary private sector applications for the proposed gas chromatograph mass spectrometer system is for use in performing portable chemical analysis, particularly when looking for harmful gases. The sensitive and specific sensor that we propose to develop will not only help ensure the timely generation of data for hazardous gas detection, but will also provide this capability to commercial organizations wishing to perform chemical analysis in the field. For example, the proposed system would be invaluable for supporting first responder personnel who need to determine the safety of areas during cleaning and securing activities for interval testing in different areas. On the commercial front, inexpensive portable mass spectrometers would revolutionize pollution monitoring, process control, and the response to incidents by emergency personnel.