Combination of carbon nanotube reinforced hollow fiber membrane microextraction with gas chromatography-mass spectrometry for extraction and determination of some nitroaromatic explosives in environmental water

2013 ◽  
Vol 5 (6) ◽  
pp. 1474 ◽  
Author(s):  
Maryam Fayazi ◽  
Masoud Ghanei-Motlagh ◽  
Mohammad Ali Taher
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Carbon Nanotube ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Environmental Water ◽  
Gas Chromatography Mass Spectrometry ◽  
Fiber Membrane ◽  
Nitroaromatic Explosives

scholarly journals Membrane Assisted Simultaneous Extraction and Derivatization with Triphenylphosphine of Elemental Sulfur in Arabian Crude Samples by Gas Chromatography/Mass Spectrometry

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Ibrahim Al-Zahrani ◽  
Munzir H. Aneel Mohammed ◽  
Chanbasha Basheer ◽  
Mohammad Nahid Siddiqui ◽  
Abdulrahman Al-Arfaj
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Crude Oil ◽  
Hollow Fiber ◽  
Elemental Sulfur ◽  
Hollow Fiber Membrane ◽  
Gas Chromatography Mass Spectrometry ◽  
Fiber Membrane ◽  
Simultaneous Extraction ◽  
Chromatography Mass Spectrometry

Determination of trace level elemental sulfur from crude oil samples is a tedious task. Recently, several gas chromatographic methods were reported in which selective triphenylphosphine derivatization of sulfur was used to form triphenylphosphine sulfide. Direct quantitation of elemental sulfur from crude oil requires an efficient sample preparation method. This paper describes how simultaneous extraction derivatization of elemental sulfur was performed for the first time using porous hollow fiber membrane. A thick (0.25 um pore size; 1550 μm wall thickness; and 5500 μm inner diameter) hollow fiber membrane filled with triphenylphosphine (dissolved N-methylpyrrolidone) is used as a solvent bar. The solvent bar is tumbled freely in the crude oil sample; the elemental sulfur was extracted and derivatized. Finally, the derivatized sulfur was analyzed by gas chromatography/mass spectrometry. Various experimental conditions of solvent bar microextraction (SBME) were optimized to achieve higher extraction. The linear range was established between 1 and 50 μg/mL, while a squared regression coefficient was found to be 0.9959 μg/mL. Relative standard deviation (RSD) was below 10%. Relative recoveries were calculated for SBME in crude oil samples and were in the range between 98.2% and 101.2%.

Functionalized carbon nanotube/ionic liquid-coated wire as a new fiber assembly for determination of methamphetamine and ephedrine by gas chromatography-mass spectrometry

2014 ◽  
Vol 6 (21) ◽  
pp. 8645-8653 ◽  
Author(s):  
Omid Narimani ◽  
Naser Dalali ◽  
Kobra Rostamizadeh
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Ionic Liquid ◽  
Carbon Nanotube ◽  
Steel Wire ◽  
Gas Chromatography Mass Spectrometry ◽  
Fiber Assembly ◽  
Coated Wire ◽  
Headspace Spme

Carbon nanotube–ionic liquid gel immobilized on a stainless steel wire as a novel fiber was successfully applied for headspace SPME of methamphetamine and ephedrine.

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