Chinese Journal of Chromatography

Chinese Journal of Chromatography

• Technical Notes • Previous Articles    


Identification of concentration and brand for products using differential gel permeation chromatography

WANG Qingguo1, LI Xiaowen1, LIU Bo1, CAI Lixing1, CHENG Rongshi2,3

  

  1. 1.College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, China; 2.College of Chemistry and Technology, Nanjing University, Nanjing 210093, China; 3.Research Institute of Polymer Science, South China University of Technology, Guangzhou 510640, China
  • Received:2007-09-03 Revised:2007-10-29 Online:2008-03-30 Published:1984-06-25
  • Contact: WANG Qing-Guo

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Abstract:

In differential gel permeation chromatographic method (D-GPC), a standard solution and an analyzed solution are used as the eluent and injected solution, respectively. It can determine the minute differences between them. When the analyzed solution and the standard solution are identical, a null signal is given, otherwise the nonzero signal tells the detailed differences between them. Two examples, the concentration identification of five polyethylene glycol 200 (PEG200) solutions and the brand identification of three brands of beers, are given to show the application of the D-GPC method. The potential applications of the D-GPC method in quality control and the identification of counterfeit products are also discussed.

Key words: brand identification , concentration identification, differential gel permeation chromatography （D-GPC）