Ultrasound-assisted emulsification liquid phase microextraction method based on deep eutectic solvent as extraction solvent for determination of five pesticides in traditional Chinese medicine

2019 ◽  
Vol 166 ◽  
pp. 213-221 ◽  
Author(s):  
Xianhui Li ◽  
Manman Wang ◽  
Jing Zhao ◽  
Huiwen Guo ◽  
Xun Gao ◽  
...  
Keyword(s):  
Chinese Medicine ◽  
Liquid Phase ◽  
Traditional Chinese Medicine ◽  
Deep Eutectic Solvent ◽  
Liquid Phase Microextraction ◽  
Extraction Solvent ◽  
Ultrasound Assisted

scholarly journals Liquid Phase and Microwave-Assisted Extractions for Multicomponent Phenolic Pattern Determination of Five Romanian Galium Species Coupled with Bioassays

Molecules ◽  
2019 ◽  
Vol 24 (7) ◽  
pp. 1226 ◽  
Author(s):  
Andrei Mocan ◽  
Alina Diuzheva ◽  
Sabin Bădărău ◽  
Cadmiel Moldovan ◽  
Vasil Andruch ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Iridoid Glycosides ◽  
Deep Eutectic Solvent ◽  
Inhibitory Effect ◽  
Total Phenolic ◽  
Extraction Solvent ◽  
Microwave Assisted ◽  
Pattern Determination ◽  
Natural Deep Eutectic Solvent

Background: Galium is a plant rich in iridoid glycosides, flavonoids, anthraquinones, and small amounts of essential oils and vitamin C. Recent works showed the antibacterial, antifungal, antiparasitic, and antioxidant activity of this plant genus. Methods: For the determination of the multicomponent phenolic pattern, liquid phase microextraction procedures were applied, combined with HPLC-PDA instrument configuration in five Galium species aerial parts (G. verum, G. album, G. rivale, G. pseudoaristatum, and G. purpureum). Dispersive Liquid–Liquid MicroExtraction (DLLME) with NaCl and NAtural Deep Eutectic Solvent (NADES) medium and Ultrasound-Assisted (UA)-DLLME with β-cyclodextrin medium were optimized. Results: The optimal DLLME conditions were found to be: 10 mg of the sample, 10% NaCl, 15% NADES or 1% β-cyclodextrin as extraction solvent—400 μL of ethyl acetate as dispersive solvent—300 μL of ethanol, vortex time—30 s, extraction time—1 min, centrifugation at 12000× g for 5 min. Conclusions: These results were compared with microwave-assisted extraction procedures. G. purpureum and G. verum extracts showed the highest total phenolic and flavonoid content, respectively. The most potent extract in terms of antioxidant capacity was obtained from G. purpureum, whereas the extract obtained from G. album exhibited the strongest inhibitory effect against tyrosinase.

Sensitive determination of psychotropic drugs in urine samples using continuous liquid-phase microextraction with an extraction solvent lighter than water

2018 ◽  
Vol 42 (6) ◽  
pp. 4450-4456 ◽  
Author(s):  
Lida Haghnazari ◽  
Hamid Nomani ◽  
Nazir Fattahi ◽  
Kiomars Sharafi ◽  
Masoud Moradi
Keyword(s):  
Liquid Phase ◽  
Psychotropic Drugs ◽  
Urine Samples ◽  
Liquid Phase Microextraction ◽  
Extraction Solvent ◽  
Sensitive Determination ◽  
First Time

A novel extraction vessel was employed, for the first time, in continuous liquid-phase microextraction (CLPME) with an extraction solvent lighter than water for the extraction of psychotropic drugs from urine samples.

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