Effect of type of stirring on hollow fiber liquid phase microextraction and electromembrane extraction of basic drugs: speed up extraction time and enhancement of extraction efficiency

RSC Advances ◽  
2016 ◽  
Vol 6 (111) ◽  
pp. 110221-110228 ◽  
Author(s):  
Saeed Nojavan ◽  
Zeinab Tahmasebi ◽  
Saied Saeed Hosseiny Davarani
Keyword(s):  
Liquid Phase ◽  
Hollow Fiber ◽  
Extraction Efficiency ◽  
Extraction Time ◽  
Basic Drugs ◽  
Liquid Phase Microextraction ◽  
Speed Up ◽  
Electromembrane Extraction

In microextraction procedures, the stirring of the donor solution is crucial to speed up the extraction.

Kinetic aspects of hollow fiber liquid-phase microextraction and electromembrane extraction

2012 ◽  
Vol 742 ◽  
pp. 10-16 ◽  
Author(s):  
Astrid Gjelstad ◽  
Henrik Jensen ◽  
Knut Einar Rasmussen ◽  
Stig Pedersen-Bjergaard
Keyword(s):  
Liquid Phase ◽  
Hollow Fiber ◽  
Liquid Phase Microextraction ◽  
Electromembrane Extraction

Hollow Fiber Liquid Phase Microextraction as an Advantageous Approach for Preconcentraton of Malachite Green in Environmental Water

2013 ◽  
Vol 726-731 ◽  
pp. 1491-1495
Author(s):  
Zhen Chang ◽  
Kai Zhou ◽  
Liu Qing Yang ◽  
Xiang Yang Wu ◽  
Zhen Zhang
Keyword(s):  
Liquid Phase ◽  
Malachite Green ◽  
Hollow Fiber ◽  
High Performance ◽  
Environmental Water ◽  
Extraction Time ◽  
Two Phase ◽  
Liquid Phase Microextraction ◽  
Relative Standard ◽  
Donor Phase

A two-phase hollow fiber liquid phase microextraction (HF-LPME) by coupling with high performance liquid chromatography (HPLC) was developed to analyze malachite green (MG) in environmental water. In this method, 1-octyl-3-methylimidazolium hexafluorophosphate ([C8MI[PF6]) was selected as extraction agent, and several parameters (sample pH, salinity, extraction time, shaking rate, volume of donor phase) that could affect extraction performance were investigated. Under the optimal extraction conditions (sample pH, 5; salinity, 4% sodium chloride; extraction time, 6 h; shaking rate, 200 rpm; volume of donor phase, 200 mL), the established method showed excellent characters as: high enrichment factor (1193), wide linear range (0.2-100 μg L-1), low detection limit (0.1 μg L-1), good reproducibility (relative standard deviation, RSD 8.4%, n= 5) and satisfactory recovery (102.8%, n= 5). The approach was applied in real water samples analysis, which indicated that it has great potentials for rapidly monitoring low concentration of MG in environmental waters.

Multi-walled Carbon Nanotubes Reinforced into Hollow Fiber by Chitosan Sol-gel for Solid/Liquid Phase Microextraction of NSAIDs from Urine Prior to HPLC-DAD Analysis

2019 ◽  
Vol 20 (5) ◽  
pp. 390-400 ◽  
Author(s):  
Nabil N. AL-Hashimi ◽  
Amjad H. El-Sheikh ◽  
Rania F. Qawariq ◽  
Majed H. Shtaiwi ◽  
Rowan AlEjielat
Keyword(s):  
Carbon Nanotubes ◽  
Liquid Phase ◽  
Hollow Fiber ◽  
Sol Gel ◽  
Liquid Phase Microextraction ◽  
Extraction Device ◽  
Multi Walled Carbon Nanotubes ◽  
Solid Liquid ◽  
Walled Carbon Nanotubes

Background: The efficient analytical method for the analysis of nonsteroidal antiinflammatory drugs (NSAIDs) in a biological fluid is important for determining the toxicological aspects of such long-term used therapies. Methods: In the present work, multi-walled carbon nanotubes reinforced into a hollow fiber by chitosan sol-gel assisted-solid/ liquid phase microextraction (MWCNTs-HF-CA-SPME) method followed by the high-performance liquid chromatography-diode array detection (HPLC–DAD) was developed for the determination of three NSAIDs, ketoprofen, diclofenac, and ibuprofen in human urine samples. MWCNTs with various dimensions were characterized by various analytical techniques. The extraction device was prepared by immobilizing the MWCNTs in the pores of 2.5 cm microtube via chitosan sol-gel assisted technology while the lumen of the microtube was filled with few microliters of 1-octanol with two ends sealed. The extraction device was operated by direct immersion in the sample solution. Results: The main factors influencing the extraction efficiency of the selected NSAIDs have been examined. The method showed good linearity R2 ≥ 0.997 with RSDs from 1.1 to 12.3%. The limits of detection (LODs) were 2.633, 2.035 and 2.386 µg L-1, for ketoprofen, diclofenac, and ibuprofen, respectively. The developed method demonstrated a satisfactory result for the determination of selected drugs in patient urine samples and comparable results against reference methods. Conclusion: The method is simple, sensitive and can be considered as an alternative for clinical laboratory analysis of selected drugs.

Determination of estrogens in wastewater using three-phase hollow fiber-mediated liquid-phase microextraction followed by HPLC

2008 ◽  
Vol 31 (4) ◽  
pp. 622-628 ◽  
Author(s):  
Meihua Liu ◽  
Bin Qiu ◽  
Xia Jin ◽  
Lan Zhang ◽  
Xi Chen ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Hollow Fiber ◽  
Liquid Phase Microextraction ◽  
Three Phase

Hollow fiber supported liquid-phase microextraction combined with maltodextrin-modified capillary electrophoresis for the determination of citalopram enantiomers in urine samples

2015 ◽  
Vol 7 (5) ◽  
pp. 2012-2019 ◽  
Author(s):  
Jafar Abolhasani ◽  
Hamid Reza Jafariyan ◽  
Mohammad Mahdi khataei ◽  
Rahim Hosseinzadeh-khanmiri ◽  
Ebrahim Ghorbani-kalhor ◽  
...  
Keyword(s):  
Capillary Electrophoresis ◽  
Liquid Phase ◽  
Hollow Fiber ◽  
Urine Samples ◽  
Simple Method ◽  
Liquid Phase Microextraction ◽  
Supported Liquid Phase

A simple method was developed for the separation and determination of citalopram enantiomers in urine samples.

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