Hfcs42 And Hfcs55 (Inverted Sugars) - Mettler Toledo Refracto 30PX Bedienungsanleitung

13.4

HFCS42 and HFCS55 (inverted sugars)

HFCS stands for High-Fructose Corn Syrup. These syrups are manufactured from
natural corn syrup and consist of inverted (or isomerized) sugar, i.e. a mixture of
dextrose, fructose, maltose and sucrose. They are classified according to their
fructose content. Mainly three different HFCS are in use: a mixture containing
42 % fructose (HFC2S42), one containing 55 % fructose (HFCS55) and a third
one containing 90 % fructose (HFCS90).
Inverted sugar concentration denominates the concentration in weight % of an
isomerized sugar solution. Inverted sugar concentration can be converted from
the refractive index of the inverted sugar solution measured at 20 °C (n
Refracto has stored conversion tables ("Physical Properties Table", Corn Prod-
ucts, 1991) for two of the mixtures (HFCS42 and HFCS55) as well as a table for
temperature compensation.
The relation between inverted sugar concentration and refractive index varies
with the composition of the inverted sugar. Compositions of the inverted sugar
syrups HFCS42 and HFCS55 are shown below.
Fructose
Dextrose
Maltose
Sucrose
Maltotriose DP3
Oligosaccharide DP4
Sulfated Ash
METTLER TOLEDO Refracto 30PX/GS
HFCS42
42.50 % 55.40 %
52.50 % 40.30 %
3.00 %
0.00 %
0.70 %
1.30 %
0.03 %
HFCS55
3.00 %
0.00 %
0.40 %
0.90 %
0.05 %
Appendix
20
). The
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