《中国甘草(英文版)》内容简介：The addition of entrainer will obviously change the phase action of supercriticalfluids, increase diffusing speed, diffusing concentration and intermolecular power, andincrease the substance solubility in supercritical fluids. The water content of entrainermust not also be high in order to avoid frozen pipes. Therefore we chose 75 % ethanolas the lowest concentration.