Chemical analysis of aerosol in the Venusian cloud layer by reaction gas chromatography on board the VEGA landers

Physics

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Aerosols, Chemical Analysis, Cloud Physics, Venus Atmosphere, Venus Clouds, Equipment Specifications, Gas Chromatography, Sulfuric Acid

Scientific paper

The experiment on sulfuric acid aerosol determination in the Venusian cloud layer on board the Vega landers is described. An average content of sulfuric acid of approximately 1 mg/cu m was found for the samples taken from the atmosphere at heights from 63 to 48 km and analyzed with the SIGMA-3 chromatograph. Sulfur dioxide (SO2) was revealed in the gaseous sample at the height of 48 km. From the experimental results and blank run measurements, a suggestion is made that the Venusian cloud layer aerosol consists of more complicated particles than the sulfuric acid water solution does.

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