Development of NMR and Raman spectroscopic methods for the determination of the degree of substitution of maleate in modified starches

C. K. Chong, J. Xing, D. L. Phillips*, H. Corke

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

In this paper we report the application of NMR spectroscopy and Raman spectroscopy to determine the degree of maleate substitution in maleinated starches. Five kinds of maleinated starches were investigated and calibration sets were constructed to derive linear regression equations that may be used to predict the degree of maleate substitution for starch samples with unknown amounts of chemical modification. The calibration sets reported have very high linearity (r > 0.99) for both the NMR and Raman methods. The NMR and Raman calibration sets allow fast and nondestructive measurement of the degree of maleate substitution for different starches with little need of sample preparation.

Original languageEnglish
Pages (from-to)2702-2708
Number of pages7
JournalJournal of Agricultural and Food Chemistry
Volume49
Issue number6
DOIs
StatePublished - 2001
Externally publishedYes

Keywords

  • Maleinated starch
  • NMR spectroscopy
  • Raman spectroscopy
  • Substitution degree

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