Radix Bupleuri is widely used in traditional Chinese medicine, in which volatile oils and saikosaponins(SS) are considered as two major bioactive components. Volatile oils are described as anti-inflammatory and anti-pyretic agent. SS especially saikosaponin-a (SSa) and saikosaponin-d (SSd) have the functions of anti-inflammation, liver-protecting, reducing plasma-cholesterol, immunoregulatory and anti-cancer. Traditional extraction methods of volatile oils and SS may result in thermal degradation of t...