Science in China Series B: Chemistry

, Volume 50, Issue 4, pp 530–537 | Cite as

A post-modification approach to independent component analysis for resolution of overlapping GC/MS signals: from independent components to chemical components

  • Wang Wei 
  • Cai WenSheng 
  • Shao XueGuang 
Research Parpers


Independent component analysis (ICA) has demonstrated its power to extract mass spectra from overlapping GC/MS signal. However, there is still a problem that mass spectra with negative peaks at some m/z will be obtained in the resolved results when there are overlapping peaks in the mass spectra of a mixture. Based on a detail theoretical analysis of the preconditions for ICA and the non-negative property of GC/MS signals, a post-modification based on chemical knowledge (PMBK) strategy is proposed to solve this problem. By both simulated and experimental GC/MS signals, it was proved that the PMBK strategy can improve the resolution effectively.


independent component analysis (ICA) post modification immune algorithm (IA) GC/MS 


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Copyright information

© Science in China Press 2007

Authors and Affiliations

  1. 1.Department of ChemistryUniversity of Science and Technology of ChinaHefeiChina
  2. 2.Department of ChemistryNankai UniversityTianjinChina

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