The extraction techniques are generalized under three categories : the supported liquid membrane extraction ( slme ) and microporous membrane liquid - liquid extraction ( mmlle ) based on flat membrane and the liquid phase microextraction ( hflpme ) based on hollow fiber membrane 其应用概括起来分为以下3类：以扁平膜为基础的支撑液膜萃取( slme )和微孔膜液液萃取( mmlle ) ，以中空纤维膜为基础的液相微萃取( hflpme ) 。
