The effects of sample concentration, ultrasonic extraction time, and different extracting solvent on the extraction of volatile microconstituents were also investigated.
研究了样品萃取量、超声波萃取时间、以及不同萃取溶剂对微量挥发性成分萃取效果的影响。
2
Gas chromatograph is the important apparatus to analyze microconstituents in liquor and it is classified into packed column gas chromatograph and capillary column gas chromatograph.