Ultrasound-assisted extraction followed by dispersive liquid–liquid microextraction before gas chromatography-mass spectrometry for the simultaneous determination of flavouring compounds in tobacco additives

2012 ◽  
Vol 4 (4) ◽  
pp. 995 ◽  
Author(s):  
Panpan Li ◽  
Xiaolan Zhu ◽  
Shenqiu Hong ◽  
Zhenfeng Tian ◽  
Jun Yang
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Simultaneous Determination ◽  
Gas Chromatography Mass Spectrometry ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

Differentiation of two types of pu-erh teas by using an electronic nose and ultrasound-assisted extraction-dispersive liquid–liquid microextraction-gas chromatography-mass spectrometry

2016 ◽  
Vol 8 (3) ◽  
pp. 593-604 ◽  
Author(s):  
Jing Ye ◽  
Wenguang Wang ◽  
Chitang Ho ◽  
Jun Li ◽  
Xiaoyu Guo ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Sensory Evaluation ◽  
Electronic Nose ◽  
Gas Chromatography Mass Spectrometry ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

It is a challenging task to discriminate raw pu-erh tea, notably aged raw tea, from ripened pu-erh tea, both of which are the two primary types of pu-erh teas, only based on the taster's sensory evaluation.

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