Dual ultrasonic-assisted dispersive liquid–liquid microextraction coupled with microwave-assisted derivatization for simultaneous determination of 20( S )-protopanaxadiol and 20( S )-protopanaxatriol by ultra high performance liquid chromatography–tandem mass spectrometry

2016 ◽  
Vol 1437 ◽  
pp. 49-57 ◽  
Author(s):  
Xian-En Zhao ◽  
Tao Lv ◽  
Shuyun Zhu ◽  
Fei Qu ◽  
Guang Chen ◽  
...  
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