Throughout our development, we have tested synthetic resins for the adsorption step in our process.  Each time we have rejected this in favor of a custom blend of organic adsorbents that are never recharged with harsh chemicals.  This avoids the off flavors--plastic, solvent or papery--that inevitably come from these types of resins.  

Because of this, they adsorb a little bit of CO2. A hallmark of our process is that the wine's fruity aromas are "revealed".  A few of our winemaker customers have noted that they need to sparge with a little CO2 to get the full "fruit explosion" effect.