National food safety standard Food nutrition enhancer - Galactooligosaccharides
1 Scope
This standard is applicable to food nutrition enhancer, galactooligosaccharides, generated with lactose as raw material, by catalyzing and hydrolyzing the galactosidine bond with β-galactosidase produced with bacillus ATCC 31382 (Bacillus sp.) or Aspergillus oryzae, then hydrolyzing the lactose into galactose and glucose, meanwhile transferring the hydrolyzed galactoside into the lactose molecules through the action of transferring galactoside.
2 Structural formula, molecular formula and relative molecular mass
2.1 Structural formula
2.2 Molecular formula
(C6H11O5)n, n is 2~8.
2.3 Relative molecular mass
300~2,000 (according to the international relative atomic mass in 2018).
3 Product classification
3.1 Galactooligosaccharide powder
Product by directly drying the galactooligosaccharide solution.
3.2 Liquid galactooligosaccharide
A liquid product of galactooligosaccharides.
4 Technical requirements
4.1 Sensory requirements
The sensory requirements shall meet those specified in Table 1.
Table 1 Sensory requirements
Item Requirements Test method
Powder Liquid
Color, luster and state White or yellowish powder Colorless transparent or light yellow syrup Take a proper amount of specimen and put it into a clean and dry white porcelain dish or beaker, then observe its color and luster as well as state in natural light and smell (taste) it
Odor No peculiar smell No peculiar smell
Taste Sweet taste Sweet taste
4.2 Physical and chemical indexes
The physical and chemical indexes shall meet those specified in Table 2.
Table 2 Physical and chemical indexes
Item Index Test method
Powder Liquid
Content of galactooligosaccharide (counted by dry basis), ω/% ≥ 57 57 Annex A, A.2
1 Scope 2 Structural formula, molecular formula and relative molecular mass 3 Product classification 4 Technical requirements Annex A Test method Annex B Chromatogram for determination of galactooligosaccharides by double-column method Annex C Chromatogram for determination of galactooligosaccharides by high performance ion exchange chromatography
