News Column

Investigators from University of Sindh Zero in on Solvents

May 6, 2014

By a News Reporter-Staff News Editor at Life Science Weekly -- New research on Solvents is the subject of a report. According to news originating from Jamshoro, Pakistan, by NewsRx correspondents, research stated, "A rapid and innovative microextraction technique named as, ionic liquid-based ultrasound-assisted dual magnetic microextraction (IL-UA-DMME) was developed for the preconcentration and extraction of trace cadmium from environmental and biological samples, prior to analyzed by flame atomic absorption spectrometry (FAAS). The proposed method has many obvious advantages, including evading the use of organic solvents and achieved high extraction yields by the combination of dispersive liquid-liquid microextraction (DLLME) and magnetic mediated-solid phase extraction (MM-SPE)."

Our news journalists obtained a quote from the research from the University of Sindh, "In this approach ionic liquid (IL) 1-butyl-3-methylimidazolium hexafluorophosphate [C(4)mim][PF6] play an important role to extract the cadmium-4-(2-thiazolylazo)-resorcinol (Cd-TAR) complex from acid digested sample solutions and ultrasonic irradiation was applied to assist emulsification. After then, dispersed small amount of Fe3O4 magnetic nanoparticles (MNPs) in sample solutions to salvaged the IL and complete phase separation was attained. Some analytical parameters that influencing the efficiency of proposed (IL-UA-DMME) method, such as pH, volume of IL, ligand concentration, ultra-sonication time, amount of Fe3O4 MNPs, sample volume and matrix effect were optimized. Limit of detection (LOD) and enrichment factor (EF) of the method under optimal experimental conditions were found to be 0.40 mu g L-1 and 100, respectively. The relative standard deviation (RSD) of 50 mu g L-1 Cd was 4.29%. The validity and accuracy of proposed method, was assessed to analyzed certified reference materials of fortified lake water TMDA-54.4, SPS-WW2 waste water, spinach leaves 1570a and also checked by standard addition method. The obtained values showed good agreement with the certified values and sufficiently high recovery were found in the range of 98.1-101% for Cd."

According to the news editors, the research concluded: "The proposed method was facile, rapid and successfully applied for the determination of Cd in environmental and different biological samples."

For more information on this research see: Rapid ionic liquid-based ultrasound assisted dual magnetic microextraction to preconcentrate and separate cadmium-4-(2-thiazolylazo)-resorcinol complex from environmental and biological samples. Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy, 2014;123():194-199. Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England (see also Solvents).

The news correspondents report that additional information may be obtained from S. Khan, Univ Sindh, Center Excellence Analyt Chem, Jamshoro 76080, Pakistan. Additional authors for this research include T.G. Kazi and M. Soylak.

Keywords for this news article include: Asia, Cadmium, Phenols, Jamshoro, Pakistan, Solvents, Resorcinols, Ionic Liquids, Transition Elements

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Source: Life Science Weekly

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