Characterization of irradiated starches by using FT-Raman and FTIR spectroscopy

Ramazan Kizil, Joseph Irudayaraj, Koushik Seetharaman

Research output: Contribution to journalArticlepeer-review


Fourier transform infrared (FTIR) and Fourier transform Raman (FT-Raman) methods were used for rapid characterization and classification of selected irradiated starch samples. Biochemical changes due to irradiation were detected using the two vibrational spectroscopic techniques, and canonical variate analysis (CVA) was applied to the spectral data for discriminating starch samples based on the extent of irradiation. The O-H (3000-3600 cm-1) stretch, C-H (2800-3000 cm-1) stretch, the skeletal mode vibration of the glycosidic linkage (900-950 cm-1) in both Raman and infrared spectra, and the infrared band of water adsorbed in the amorphous parts of starches (1550-1750 cm-1) were employed in classification analysis of irradiated starches. Spectral data related to water adsorbed in the noncrystalline regions of starches provided a better classification of irradiated starches with 5 partial least-squares (PLS) factors in the multivariate model.

Original languageEnglish (US)
Pages (from-to)3912-3918
Number of pages7
JournalJournal of Agricultural and Food Chemistry
Issue number14
StatePublished - Jul 3 2002
Externally publishedYes


  • Detection of irradiated starches
  • Discrimination analysis
  • FT-Raman spectroscopy
  • FTIR spectroscopy
  • Starch irradiation

ASJC Scopus subject areas

  • Chemistry(all)
  • Agricultural and Biological Sciences(all)

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