Microporous silica with nanolayer structure coated with renewable organic solvent film as a novel extracting phase: A combination of solid- and liquid-phase microextraction

2012 ◽  
Vol 721 ◽  
pp. 61-67 ◽  
Author(s):  
Mohammad Saraji ◽  
Bahman Farajmand
Keyword(s):  
Liquid Phase ◽  
Organic Solvent ◽  
Liquid Phase Microextraction ◽  
Microporous Silica

Analysis of Di-(2-ethylhexyl)phthalate in Plastic Bottles of Drinking Water with Cone-shaped Membrane–Liquid Phase Microextraction

2016 ◽  
Vol 10 (2) ◽  
pp. 247-250
Author(s):  
Yanuardi Raharjo ◽  
◽  
Atika Gardena Kartika ◽  
Usreg Sri Handajani ◽  
◽  
...  
Keyword(s):  
Drinking Water ◽  
Liquid Phase ◽  
Organic Solvent ◽  
Ethyl Acetate ◽  
Water Sample ◽  
Mineral Water ◽  
Drinking Water Sample ◽  
Liquid Phase Microextraction ◽  
Limit Detection ◽  
Ethylhexyl Phthalate

The analysis of di-(2-ethylhexyl) phthalate (DEHP) was done in three kinds of polyethylene terephthalate (PET) plastic bottles of mineral water, namely: new bottle, ten times refilled and sunlight exposed new bottle. The optimal condition on this study is ethyl acetate as an organic solvent, 175 µl of organic solvent and 20 min of extraction time. This method has limit detection about 0.29 ppm, precision 96.48–110.10 %, accuracy until 1.95 % and enrichment factor until 302.67 times. Based on these results, cone shaped membrane-liquid phase microextraction method (CSM-LPME-HPLC) could be used to analyze DEHP in a PET plastic bottle of drinking water sample under mentioned kinds of circumstances with the concentration of 0.40, 0.53 and 0.76 ppm, respectively.

Droplets-based microextraction assisted SPME for GC-MS analysis of polar compounds such as clopyralid in water

2014 ◽  
Vol 6 (16) ◽  
pp. 6571-6576 ◽  
Author(s):  
Ionel Ciucanu ◽  
Petra Silvia Popa ◽  
Vlad Agotici ◽  
Gheorghe Dehelean
Keyword(s):  
Liquid Phase ◽  
Organic Solvent ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Polar Compounds ◽  
Liquid Phase Microextraction ◽  
Ms Analysis

The performance of liquid phase microextraction with droplets of organic solvent that assists solid phase microextraction with fiber was assessed for GC-MS analysis of polar compounds in water.

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
Sign in / Sign up

Export Citation Format

Share Document