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Gas Chromatograph

NSSDCA ID: 1978-086C-02

Mission Name: Venera 12 Descent Craft
Principal Investigator:Dr. L. M. Mukhin


The object of this experiment was the quantitative determination of the chemical structure of the Venusian atmosphere using a gas chromatograph. The gas sample was analyzed by three columns and detectors in series. The first column, filled with Polysorb, served to separate sulfur-containing compounds and the moisture in the carbon dioxide. The second column, filled with molecular sieves, served to separate the low-boiling point gases such as helium, hydrogen, argon, oxygen, nitrogen, krypton, methane, and carbon monoxide. The third column, filled with reduced manganese, served to separate argon. Neon was used as the carrier gas and hence can not be determined. The sensitivity threshold of the instrument was between 1E-5 and 1E-3 volume percent. The gas chromatograph cycled every 6 minutes. The experiment was active during the descent from 42 km to the Venusian surface. Eight analyses of the atmosphere were completed. The experiment was described by Gel'man, B. G. et al., 1979, Cosmic Research, Consultants Bureau, New York, v. 17, n. 5, pp. 585-589 (Kosmicheskie Issledovanija, 1979, v. 17, n. 5, pp. 708-713).

Alternate Names

  • Venera12DescentCraft/GasChromatograph

Funding Agency

  • Unknown (U.S.S.R)


  • Planetary Science: Atmospheres

Additional Information

Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office



NameRoleOriginal AffiliationE-mail
Dr. L. M. MukhinPrincipal InvestigatorInstitut Kosmicheskich Issledovaniya (IKI)
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