Measurements of the Henry's law coefficients of 2-methyl-3-buten-2-ol, methacrolein, and methylvinyl ketone

Using an equilibrium headspace technique, Henry's law coefficients were mea sured for methacrolein (H = 6.5 +/- 0.7 M atm(-1)) and methylvinyl ketone ( 41 +/- 7.0 M atm(-1)) in water at 25 degrees C. In addition, 2-methyl-3-but en-2-ol was studied at 30 degrees C in water and in an aqueous ionic soluti on representative of plant tissue. Similar values were found in deionized w ater (65 +/- 3.5 M atm(-1)) and in a 0.05 mol kg(-1) Ca2+, K+, NO3-, SO42- solution (62 +/- 0.8 M atm(-1)). These Henry's Law coefficients are too sma ll to allow for significant partitioning of methacrolein, methylvinyl keton e or methylbutenol into cloud water under equilibrium conditions.