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Data Reduction in Gas Chromatography

Gas Chromatography

  1. G.A. Eiceman1,
  2. J. Gardea-Torresdey2

Published Online: 15 SEP 2006

DOI: 10.1002/9780470027318.a5503

Encyclopedia of Analytical Chemistry

Encyclopedia of Analytical Chemistry

How to Cite

Eiceman, G. and Gardea-Torresdey, J. 2006. Data Reduction in Gas Chromatography. Encyclopedia of Analytical Chemistry. .

Author Information

  1. 1

    New Mexico State University, Las Cruces, USA

  2. 2

    University of Texas, El Paso, USA

Publication History

  1. Published Online: 15 SEP 2006


The data obtained from a gas chromatographic measurement provide the user with details on both the quantitative and the qualitative composition of the sample. This information is displayed in the chromatogram from which information also can be gleaned concerning the performance and quality of the measurement. Quantitative determinations require attention to the relative response of the detector. The assignment of identity of individual constituents is possible in a formal sense only with authentic standards and mass spectra though retention times or indices can be indicators of identity. These aspects of data reduction have been understood for several decades and chemical information can be extracted from a chromatogram with ease and convenience.

In recent years, advanced chemometrics methods have been applied to chromatographic data with intrinsic advantages for probing patterns and trends too subtle or too complex for simple inspection of chromatograms. These methods are rooted in tools such as multivariate analysis and neural network analysis. Such methods are being developed in the area of natural products analysis.