Mannans as stabilizers of oil-in-water beverage emulsions

Kirsi S. Mikkonen*, Maija Tenkanen, Peter Cooke, Chunlin Xu, Hannu Rita, Stefan Willför, Bjarne Holmbom, Kevin B. Hicks, Madhav P. Yadav

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

79 Citations (Scopus)


The stabilizing effect of spruce galactoglucomannan (GGM) on a model beverage emulsion system was studied and compared to that of guar gum and locust bean gum galactomannans, konjac glucomannan, and corn arabinoxylan. In addition, guar gum was enzymatically modified in order to examine the effect of the degree of polymerization and the degree of substitution of galactomannans on emulsion stability. Use of GGM increased the turbidity of emulsions both immediately after preparation and after storage of up to 14 days at room temperature. GGM emulsions had higher turbidity than the emulsions containing other mannans. The initial turbidity increased with increasing GGM content, but after 14 days storage at room temperature, the turbidity was the highest for GGM/oil ratio of 0.10:1 when ethanol-precipitated GGM was used. Increasing the storage temperature to +45 °C led to rapid emulsion breakdown, but a decrease in storage temperature increased emulsion stability after 14 days. Confocal microscopy showed that the average particle size in the bottom part of GGM emulsions stored for 14 days was smaller than 1 μm. A low degree of polymerization and a high degree of substitution of the modified galactomannans were associated with a decrease in emulsion turbidity.

Original languageEnglish
Pages (from-to)849-855
Number of pages7
JournalLWT - Food Science and Technology
Issue number4
Publication statusPublished - May 2009
MoE publication typeA1 Journal article-refereed


  • Emulsion stability
  • Galactomannan
  • Glucomannan
  • Spruce galactoglucomannan


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