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Abstract. — An upper limit to the atmospheric acetonitrile mixing ratio of 3.2 X 10-1 is deduced from the high resolution Kitt Peak infrared atlas of the solar spectrum. The survey of the spectral region of CH3CN main absorption shows only stratospheric ozone lines and one water vapor line and does not permit any positive identification of acetonitrile.
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C. Müller (1985) studied this question.
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