Mixture ofCO2 and modifierwas prepared by mixing ethanol at a ratio of 25% (w/w) with liquidCO2 in a cylinder 1 day before use. The cylinderwas turned upside-down to ensure homogenity of the mixture.
Mixture ofCO2 and modifierwas prepared by mixing ethanol at a ratio of 25% (w/w) with liquidCO2 in a cylinder 1 day beforeuse. The cylinderwas turned upside-down to ensure homogenity of the mixture.