Simultaneous determination of four aliphatic amines in aquatic products by ultrasound-assisted dispersive liquid–liquid microextraction coupled with high performance capillary electrophoresis

2014 ◽  
Vol 6 (14) ◽  
pp. 5140-5146 ◽  
Author(s):  
Juan Xie ◽  
Yongxin Li ◽  
Jing Zhang ◽  
Li Zeng ◽  
Dan Lu ◽  
...  
Keyword(s):  
Capillary Electrophoresis ◽  
Simultaneous Determination ◽  
Efficient Method ◽  
High Performance ◽  
Aquatic Products ◽  
Ultrasound Assisted ◽  
Dispersive Liquid Liquid Microextraction ◽  
High Performance Capillary Electrophoresis ◽  
Liquid Microextraction

A simple, rapid, inexpensive and efficient method based on ultrasound-assisted dispersive liquid–liquid microextraction (UDLLME) after pre-column derivatization coupled with high performance capillary electrophoresis (HPCE) has been developed for determination of methylamine (MA), ethylamine (EA), dimethylamine (DMA) and diethylamine (DEA) in aquatic products.

Simultaneous separation and preconcentration of phosalone and chlorpyrifos in fresh vegetables using ultrasound-assisted dispersive liquid–liquid microextraction and high performance liquid chromatography

2016 ◽  
Vol 8 (18) ◽  
pp. 3795-3801 ◽  
Author(s):  
Monireh Majlesi ◽  
Mohamadreza Massoudinejad ◽  
Fateh Hosainzadeh ◽  
Nazir Fattahi
Keyword(s):  
High Performance Liquid Chromatography ◽  
High Performance ◽  
Simple Method ◽  
Fresh Vegetables ◽  
Separation And Preconcentration ◽  
Simultaneous Separation ◽  
Ultrasound Assisted ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

UA-DLLME-SFO combined with HPLC-UV is a fast and simple method for the determination of pesticides and herbicides in fresh vegetables.

Determination of Fungicides in Fruit Juice by Ultrasound-Assisted Dispersive Liquid–Liquid Microextraction Based on Solidification of Floating Organic Solvent Droplets Followed by High Performance Liquid Chromatography

2014 ◽  
Vol 97 (1) ◽  
pp. 183-187 ◽  
Author(s):  
Run-Zhen Fan ◽  
Congyun Liu ◽  
Wenqing Jiang ◽  
Xiaonan Wang ◽  
Fengmao Liu
Keyword(s):  
Organic Solvent ◽  
High Performance ◽  
Fruit Juice ◽  
Enrichment Factors ◽  
Wide Range ◽  
Separation And Preconcentration ◽  
Ultrasound Assisted ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

Abstract Ultrasound-assisted dispersive liquid–liquid microextraction (UA-DLLME) based on solidification of the floating organic solvent droplets (SFO) combined with HPLC was used for determination of five fungicides in fruit juice samples. 1-Dodecanol, which has a low density and low toxicity, was used as the extraction solvent in UA-DLLME. The solidification of floating organic dropletsfacilitates the transfer of analytes from the aqueous phase to the organic phase. This method was easy, quick, inexpensive, precise, and linear over a wide range. Under the optimized conditions, the enrichment factors for a 5 mL fruit juice sample were 25 to 56, and the LODs for the five fungicides ranged from 5 to 50 μg/L. The average recoveries ranged from 71.8 to 118.2% with RSDsof 0.9 to 13.9%. Application of the DLLME-SFO technique allows successful separation and preconcentration of the fungicides at a low concentration level in fruit juice samples.

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