scholarly journals Ionic liquids in microextraction techniques

2012 ◽  
Vol 10 (3) ◽  
pp. 652-674 ◽  
Author(s):  
Vida Vičkačkaitė ◽  
Audrius Padarauskas
Keyword(s):  
Ionic Liquids ◽  
High Performance ◽  
Solid Phase ◽  
Analytical Techniques ◽  
Absorption Spectrometry ◽  
Practical Applications ◽  
Flame Atomic Absorption ◽  
Single Drop Microextraction ◽  
Microextraction Techniques ◽  
Dispersive Liquid Liquid Microextraction

AbstractThe tremendous potential of room temperature ionic liquids as an alternative to environmentally harmful ordinary organic solvents is well recognized. Due to their unique properties, such as low volatility, tunable viscosity and miscibility, and electrolytic conductivity, ionic liquids have attracted extensive attention and gained popularity in many areas of analytical chemistry including modern sample preparation techniques. In this review the advantages and limitations of application of ionic liquids as solvents/sorbents for microextraction are critically discussed. Topics covered include solid-phase microextraction, single drop microextraction, dispersive liquid-liquid microextraction and hollow-fiber liquid-phase microextraction. The compatibility of the ionic liquid-based microextraction with different analytical techniques such as gas chromatography, high-performance liquid chromatography, electrothermal or flame atomic absorption spectrometry and some others is also discussed. Finally, the main practical applications on this topic are summarized.

scholarly journals Magnetic Ionic Liquids in Sample Preparation: Recent Advances and Future Trends

Separations ◽  
2021 ◽  
Vol 8 (9) ◽  
pp. 153
Author(s):  
Theodoros Chatzimitakos ◽  
Phoebe Anagnostou ◽  
Ioanna Constantinou ◽  
Kalliroi Dakidi ◽  
Constantine Stalikas
Keyword(s):  
Ionic Liquids ◽  
Sample Preparation ◽  
Solid Phase ◽  
New Class ◽  
Magnetic Ionic Liquids ◽  
Current Trends ◽  
Single Drop Microextraction ◽  
Unique Nature ◽  
Dispersive Liquid Liquid Microextraction ◽  
The Many

In the last decades, a myriad of materials has been synthesized and utilized for the development of sample preparation procedures. The use of their magnetic analogues has gained significant attention and many procedures have been developed using magnetic materials. In this context, the benefits of a new class of magnetic ionic liquids (MILs), as non-conventional solvents, have been reaped in sample preparation procedures. MILs combine the advantageous properties of ionic liquids along with the magnetic properties, creating an unsurpassed combination. Owing to their unique nature and inherent benefits, the number of published reports on sample preparation with MILs is increasing. This fact, along with the many different types of extraction procedures that are developed, suggests that this is a promising field of research. Advances in the field are achieved both by developing new MILs with better properties (showing either stronger response to external magnetic fields or tunable extractive properties) and by developing and/or combining methods, resulting in advanced ones. In this advancing field of research, a good understanding of the existing literature is needed. This review aims to provide a literature update on the current trends of MILs in different modes of sample preparation, along with the current limitations and the prospects of the field. The use of MILs in dispersive liquid–liquid microextraction, single drop microextraction, matrix solid-phase dispersion, etc., is discussed herein among others.

scholarly journals Determination of lead in water resources by flame atomic absorption spectrometry after pre-concentration with ammonium pyrrolidinedithiocarbamate immobilized on surfactant-coated alumina

2007 ◽  
Vol 72 (6) ◽  
pp. 585-590 ◽  
Author(s):  
Morteza Talebi ◽  
Homeyra Safigholi
Keyword(s):  
Water Resources ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Solid Phase ◽  
Collection Efficiency ◽  
Absorption Spectrometry ◽  
Flame Atomic Absorption ◽  
Ammonium Pyrrolidinedithiocarbamate

Arapid, simple, and sensitive procedure based on modified solid phase extraction was developed for the pre-concentration and determination of trace amount of lead in water resources. Lead was reacted with ammonium pyrrolidinedithiocarbamate (APDC) to make a complex. The complex was then collected in a column packed with surfactant-coated alumina. The parameters affecting the collection efficiency and desorption rate of the lead complexes from the column were investigated and optimized. The collection efficiency of the lead complex on the adsorbent was excellent under the optimized conditions. The results obtained from the recovery test showed the capability and reliability of the method for the analysis of trace amounts of lead. The proposed pre-concentration procedure made it possible to apply conventional flame atomic absorption spectrometry (FAAS) for the sensitive determination of trace amounts of lead in water resources. .

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