Static headspace analysis of odorants in commercial rice proteins

Jing Zhao, William L. Boatright

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Accurate identification of the odor-contributing compounds in aqueous slurries of rice proteins is necessary to improve their overall flavor characteristics. The objective of this study was to identify the primary odorants in rice protein slurries using static headspace analysis. Five commercial rice protein (RP) products, RP-G, RP-O, RP-RM, RP-RS1, and RP-RS2, were analyzed. RP-G contained the lowest levels of most of the odorants. Acetaldehyde was present in the highest amount in RP-O (0.434 mg/m3). RP-RM had the highest levels of hexanal (5.907 mg/m3), methanethiol (0.138 mg/m3), pentanal (1.575 mg/m3), and 2-pentylfuran (5.702 mg/m3). Corresponding odor values were, 111, 86, 22 and 21, respectively. In RP-RS1 and RP-RS2, the predominant odorants were dimethyl disulfide, dimethyl trisulfide, and hexanal. The results showed the importance of the volatile compounds produced from amino acids, including the sulfur-containing compounds and acetaldehyde, as well as lipid oxidation derived odorants to the overall odor of rice proteins.

Original languageEnglish
Pages (from-to)345-350
Number of pages6
JournalFood Chemistry
StatePublished - Apr 15 2017


  • Acetaldehyde
  • Copper
  • Gas chromatography-mass spectrometry
  • Hydroperoxides
  • Iron
  • Manganese
  • Sulfite
  • Sulfur-containing odorants

ASJC Scopus subject areas

  • Analytical Chemistry
  • Food Science


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