Solubility of acetone in low-temperature (210-240 K) sulfuric acid solutions

The solubility of acetone in low-temperature sulfuric acid solutions was st udied in a low-pressure Knudsen cell reactor. The time dependence of the up take coefficient was analyzed to give effective Henry's law coefficients fo r acetone in 48 - 68 wt % sulfuric acid solutions between 210 and 240 K. Th e measured solubilities suggest that very little acetone will be partitione d into sulfate aerosol particles in the upper troposphere. Addition of ammo nium sulfate to the sulfuric acid reduced the solubility slightly. No evide nce was observed for reaction of dissolved acetone with itself or with nitr ic acid under the conditions of these experiments.