Liquid–Liquid Microextraction Based on Acid–Base-Induced Deep Eutectic Solvents for Determination of β-Carotene and Lycopene in Fruit Juices

2019 ◽  
Vol 12 (12) ◽  
pp. 2777-2784 ◽  
Author(s):  
Hong Li ◽  
Chunxi Zhao ◽  
Hao Tian ◽  
Yaling Yang ◽  
Wanyi Li
Keyword(s):  
Deep Eutectic Solvents ◽  
Fruit Juices ◽  
Acid Base ◽  
Liquid Microextraction ◽  
Β Carotene

An Effective Acid–Base-Induced Liquid–Liquid Microextraction Based on Deep Eutectic Solvents for Determination of Testosterone and Methyltestosterone in Milk

2020 ◽  
Vol 58 (9) ◽  
pp. 880-886
Author(s):  
Xiao Li ◽  
Tao Yuan ◽  
Ting Zhao ◽  
Xiaomei Wu ◽  
Yaling Yang
Keyword(s):  
Hydrogen Bond ◽  
Hydrochloric Acid ◽  
High Performance ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Hydrogen Bond Donor ◽  
Acid Base ◽  
Hydrogen Bond Acceptor ◽  
Liquid Microextraction

Abstract An environmentally friendly method for the determination of testosterone and methyltestosterone by acid–base-induced deep eutectic solvents liquid–liquid microextraction (DES-ABLLME) combining with high-performance liquid chromatography was established. The deep eutectic solvent (DES) consisting of menthol:lauric acid:decanoic acid (3:1:1) can act as both hydrogen bond donor and hydrogen bond acceptor. In this approach, ammonia solution (NH3•H2O) is used as an emulsifier to react with DESs in the extraction process to generate salt and form milky white solution, achieving high extraction efficiency. Hydrochloric acid was used as a phase separator to change the emulsification state and promote the separation of extraction agent from water phase. A series of parameters were optimized including the volume of DES and the emulsifying agent, glucose concentration as well as hydrochloric acid volume. The method was linear in the range 0.5–100 μg mL−1 with a correlation coefficient (R) of 0.9999, and the limits of detection were 0.067 and 0.2 μg mL−1 for testosterone and methyltestosterone, respectively. This method was applied to analyze testosterone and methyltestosterone in milk samples, and the recoveries were between 89.2 and 108.2%.

Emulsification liquid–liquid microextraction based on deep eutectic solvents: an extraction method for the determination of sulfonamides in water samples

2017 ◽  
Vol 9 (32) ◽  
pp. 4747-4753 ◽  
Author(s):  
Lingling Liu ◽  
Tao Zhu
Keyword(s):  
Water Samples ◽  
Extraction Method ◽  
Deep Eutectic Solvents ◽  
Liquid Microextraction ◽  
Sensitive Method

In this study, a simple, inexpensive and sensitive method named emulsification liquid–liquid microextraction based on deep eutectic solvents (ELLME-DES) was used for the extraction of sulfonamides (SAs) from water samples, including sulfadiazine (SDZ), sulfamerazine (SMR), sulfametoxydiazine (SDD) and sulfamethoxazole (SMX).

Sign in / Sign up

Export Citation Format

Share Document