Girard reagent purification coupled with hollow-fiber-based stirring liquid microextraction followed by HPLC with diode array detection for determination of naphthoquinones in Qing Long Yi

2016 ◽  
Vol 8 (12) ◽  
pp. 2613-2619
Author(s):  
Yuanyuan Zhou ◽  
Yuxin Liu ◽  
Bingyou Yang ◽  
Yanqiu Jiang ◽  
Xiaoli Wang ◽  
...  
Keyword(s):  
Organic Liquid ◽  
Water Soluble ◽  
Diode Array ◽  
Lipid Solubility ◽  
Carbonyl Groups ◽  
Soluble Substance ◽  
Water Soluble Substance ◽  
Array Detection ◽  
Liquid Microextraction

Naphthoquinones all with carbonyl groups may react with the Girard reagent to form a water-soluble substance called hydrazone. These denatured naphthoquinones can recover lipid solubility transferred to the organic liquid layer.

Optimization of a dispersive liquid–liquid microextraction followed by liquid chromatography-diode array detection method for the determination of parabens in surface waters

2021 ◽  
Vol 231 ◽  
pp. 276-283
Author(s):  
Maria do Socorro P. da Silva ◽  
Carlos Eduardo P. da Silva ◽  
Francisco Luan F. da Silva ◽  
Daniel de S. Raulino ◽  
Ronaldo F. Nascimento ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Surface Waters ◽  
Detection Method ◽  
Diode Array ◽  
Diode Array Detection ◽  
Array Detection ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction
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