Abstract
Results of the chemical instrumentation and test evaluation (CITE) experiment are presented. Airborne measurements were made and intercompared for carbonyl sulfide (COS), hydrogen sulfide (H2S), and carbon disulfide (CS2). Instruments used included gas chromatographs using flame photometric detection, mass spectrometric detection, and fluorination and subsequent SF6 detection via electron capture. COS results showed that measurements from the techniques used agreed to within 10 percent. For H2S, results agreed to within about 15 percent, and for CS2 only the mass spectrometer had adequate sensitivity for measuring low mixing ratios. The CITE data were used to estimate the current uncertainty associated with aircraft measurements of COS, H2S, and CS2 in the remote troposphere. (AIAA)