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nanotimes News in Brief
12-02 :: February/March 2012
© RPI / Fazel Yavari
overcomes the shortcomings that have prevented nanostructure-based gas detectors from reaching the marketplace.
http://www.eng.rpi.edu/lemelson
The experimental process of magnetic retrieval of chitosan solid phase extraction method. © SHI Yanping et al.
Researchers from the Key Laboratory of Chemistry of Northwestern Plant Resources of the Chinese Academy of Sciences, have developed a new solid- phase extraction mode for magnetic retrieval of chitosan. The mode is combined with high-perfor- mance liquid chromatography-diode array detec- tion for the pre-concentration and determination of flavonoids in green tea beverage samples.
nanoparticles acting as carrier were added to retrieve chitosan from sample solution. Good
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In this mode, chitosan was directly put into acidic sample solution as sorbents for the extraction of target analytes. A great deal of undissolved chitosan in the sample solution plays an important role for extraction. After completing the extraction process, Fe3
reproducibilities and satisfactory recoveries were obtained.
The proposed method possesses the advantages of fastness, simplicity, low cost, ease of operation and environmental benignity.
Hong-Fei Zhang and Yan-Ping Shi: Magnetic retrieval of chitosan: Extraction of bioactive constituents from green tea beverage samples, In: Analyst, Vol. 137(2012), Issue 4, December 13, 2011, Pages 910-916, DOI:10.1039/ C1AN15873B: