Special Seminar Nov 28, 2017 | Guests from Universiti Sains Malaysia, Penang, Malaysia.


 

Special Seminar

November 28, 2017

1109/1 MHMK

11.00-12.00 AM

 

 Dr. Muggundha Raoov Ramachandran


Development of ionic liquid-based materials for the extraction of organic compounds


Dr. Muggundha Raoov Ramachandran

Integrative Medicine Cluster Advanced Medical and Dental Institute (AMDI) Universiti Sains Malaysia, Penang, Malaysia


9.00 - 10.00 AM


   Over the past decade, ionic liquids (ILs) based materials have been widely studied and applied in multiple areas of science and engineering. ILs are organic salts with melting points at or below 100 °C. These "molten salts" are typically composed of an organic cation and an organic or inorganic anion. Given that the cations and anions can be readily interchangeable to form new compounds with different properties, it has been estimated that there can be as many as 1018 possible combinations of ILs. The growth in driving force and popularity of modified ionic liquids (ILs) as promising materials in the field of analytical chemistry has resulted in an exponentially increase of their exploitation and production in analytical chemistry field. Recently, the importance of analytical application based on ILs were given much attention. Therefore, this presentation will cover the development and applications of ILs based modified materials in sample preparation techniques such as solid phase extraction (SPE), magnetic solid phase extraction (MSPE) and cloud point extraction (CPE) for the extraction of different types of organic compounds from various complex sample matrixes.

Dr. Noorfatimah Yahaya


Nanomaterial-Based Microextraction Techniques in the Analysis of Pollutants in Aqueous Samples


Dr. Noorfatimah Yahaya

Integrative Medicine Cluster Advanced Medical and Dental Institute (AMDI) Universiti Sains Malaysia, Penang, Malaysia


10.00-11.00 AM


   Sample preparation is the bottleneck of an analytical procedure that involves extraction and pre-concentration of the desired analytes often at trace levels from the sample matrix. The present study highlights the applications of nanomaterials including carbon and silica based inorganic and polymeric materials in miniaturized microextraction techniques such as solid phase membrane tip extraction (SPMTE), dispersive micro-solid phase extraction (D-μ-SPE), micro-solid phase extraction (μ-SPE), dispersive magnetic micro-solid phase extraction (DMSPE), combination of microextraction system etc. in the analysis of aqueous samples. The nanoparticles used for the microextraction are discussed on the basis of their chemical natures. The synthetic route and the preparation of nanomaterials are discussed as well as the optimization strategies for the microextraction. The comparison between the conventional material and nanomaterial used for the microextraction are also deliberated. The key roles of the nanomaterials for the extraction of different analytes such as drugs, pesticides, polycyclic aromatic hydrocarbons and other pollutants from aqueous samples were summarized. The use of nanomaterials combined with miniaturized microextraction techniques proved to be highly promising for sample preparation of various analytes present in complex sample matrices or at trace levels.

 Dr. Nur Nahirah Mohamad Zain


Application of Cloud Point Extraction for the Extraction of Organic Pollutants in Aqueous Sample


Dr. Nur Nahirah Mohamad Zain

Integrative Medicine Cluster Advanced Medical and Dental Institute (AMDI) Universiti Sains Malaysia, Penang, Malaysia


11.00-12.00 AM


   A greener method based on surfactant mediated extraction and spectrophotometric method was developed for removal of organic pollutants in water samples. The non-ionic silicone surfactant was chosen due to its low water content in a surfactant rich phase and it is well-known as environmentally-friendly solvent. The parameters affecting the extraction efficiency such as pH, temperature and incubation time, concentration of surfactant and salt, amount of surfactant and water content were evaluated and optimized. The proposed method was successfully applied for removing organic pollutants in aqueous sample.

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