Shengqing Li Talks About Liquid-Liquid Microextraction

New Hot Paper Commentary, January 2011

Shengqing Li

Article: Ionic liquid-based ultrasound-assisted dispersive liquid-liquid microextraction combined with electrothermal atomic absorption spectrometry for a sensitive determination of cadmium in water samples


Authors: Li, SQ;Cai, S;Hu, W;Chen, H;Liu, HL
Journal: SPECTROCHIM ACTA PT B-AT SPEC
Volume: 64, Issue: 7, Page: 666-671, Year: JUL 2009
* Huazhong Agr Univ, Coll Sci, Dept Chem, Wuhan 430070, Peoples R China.
* Huazhong Agr Univ, Coll Sci, Dept Chem, Wuhan 430070, Peoples R China.
(Addresses have been truncated)

Shengqing Li talks with ScienceWatch.com and answers a few questions about this month's New Hot Papers paper in the field of Engineering.


SW: Why do you think your paper is highly cited?

This work shows an improvement of dispersive liquid-liquid microextraction. A new ionic liquid-based ultrasound-assisted dispersive liquid-liquid microextraction procedure was developed for sample pretreatment of water samples. Dispersive liquid-liquid microextraction has the advantages of simplicity, rapidity, low sample volume, low cost, high recovery, and high enrichment factor and has wide applications in separation-preconcentration of a variety of analytes.

SW: Does it describe a new discovery, methodology, or synthesis of knowledge?

The article describes a new method for the sensitive determination of cadmium in water samples, using ionic liquid-based ultrasound-assisted dispersive liquid-liquid microextraction followed by electrothermal atomic absorption spectrometry.

SW: Would you summarize the significance of your paper in layman's terms?

The results of this work provide the combining advantages of ionic liquid, ultrasound-assisted emulsification, and dispersive liquid-liquid microextraction. It has no need of a disperser solvent compared with conventional dispersive liquid-liquid microextraction and is free of volatile extractant. The consumption of organic solvents and the sample preparation time were minimized significantly.

SW: How did you become involved in this research, and how would you describe the particular challenges, setbacks, and successes that you've encountered along the way? 

Developing techniques for sample pretreatment is an important part of the work of analytical chemists. Big challenges for preconcentrating ultra-trace analyte, separating and keeping the natural speciation of analyte, and pretreating samples with complex matrices are still calling for more efforts.

SW: Do you foresee any social or political implications for your research?

The proposed method has been applied to the analysis of tap, well, river, and lake water samples and shows intriguing characteristics for laboratories doing routine assay of trace metal ions.End

Shengqing Li, Ph.D. Associate Professor
Department of Chemistry
College of Science
Huazhong Agricultural University
Wuhan, China

KEYWORDS: ROOM TEMPERATURE IONIC LIQUIDS; IONIC LIQUID-BASED ULTRASOUND-ASSISTED DISPERSIVE LIQUID-LIQUID MICROEXTRACTION; ELECTROTHERMAL ATOMIC ABSORPTION SPECTROMETRY; CADMIUM; PLASMA-MASS SPECTROMETRY; PHASE EXTRACTION SPE; ORGANOPHOSPHORUS PESTICIDES; MICRO-EXTRACTION; ARRAY DETECTION; PRECONCENTRATION; SEPARATION; MERCURY.

 
 

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