Dear All,

I`m doing stable isotope research on benzene, toluene, etBz, p+m-Xyl and o-Xyl.

Does  anyone  has any informations or references about fractionation factors for
these   coumpounds   during   diffusion   in   water,   adsorption,  desorption,
solubilisation, volatilisation?

Is  it true to consider that the frationation is only a kinetic effect, and that
dissolution and adsorption at equilibrum gives no fractionation?

Is  it  an aberration to think that we can find an exchange between hydrogene of
water and the coupounds above in normal Pressures and temperatures conditions?


Thanks for any information,

Yannick Poirier