Inclusion of the standard deviation of data in spectral mapping. A case study

Paula Rodrigues, Helena Morais, Teresa Mota, Santos Olivera, Tibor Cserháti, Esther Forgács

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Colour pigments of paprika powders of different origin were separated and quantitatively determined by reversed-phase high performance liquid chromatography. The standard deviations were included in the matrices of retention data and the matrices were evaluated by spectral mapping technique followed by two-dimensional nonlinear mapping. The result indicated that the distribution of paprika samples on the two-dimensional selectivity map is a better indicator of the origin of the samples, compared to what the potency values do, and the inclusion of the standard deviation of raw data may be employed as a useful tool to enhance the reliability of the authenticity test of paprika samples.

Original languageEnglish
Pages (from-to)93-98
Number of pages6
JournalChemometrics and Intelligent Laboratory Systems
Issue number1
Publication statusPublished - Feb 15 1999



  • High Performance Liquid Chromatography
  • Paprika
  • Spectral mapping

ASJC Scopus subject areas

  • Analytical Chemistry
  • Software
  • Computer Science Applications
  • Process Chemistry and Technology
  • Spectroscopy

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