The TOGA (Trace Organic Gas Analyzer) - MIRAGE instrument mounted in the ready rack
aboard the NCAR C-130
The TOGA will be used to measure volatile organic compounds. It is based on a custom
fast gas chromatograph coupled to an Agilent 5973 Mass Spectrometer. This technique
provides unambiguous identification and quantification for a wide range of compounds
including NMHCs, OVOCs, and halocarbons through chromatographic separation and mass
selection. The limit of detection (LOD) is between 5 and 40 pptv depending on the
compound. Targeted species are measured with a time response of 2.5 minutes, yielding up
to 24 measurements per hour. The instrument is calibrated "in situ" with highly accurate
gas phase standards. It consumes less than 2000W of power.
The PAN CIRGAR instrument mounted in installed on the P-3 during
ICARTT in 2004. The
MIRAGE instrument is now smaller, but looks similiar.