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Title: Alternative Sweeteners

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High Fructose Corn Syrup 403<br />

Table 8 HFCS Physical Constants<br />

Refractometer Specific Pounds<br />

Refractive index<br />

Brix<br />

1966<br />

gravity<br />

(in air)<br />

per U.S.<br />

gal. at<br />

Hydrometer<br />

Brix<br />

Solids % 20°C 45°C ICUMSA 20°C 20°C 20°C<br />

42% HFCS<br />

11.0 1.3493 1.3457 10.92 1.04414 8.689 10.99<br />

70.5 1.4632 1.4577 69.10 1.34717 11.211 69.54<br />

71.0 1.4643 1.4589 69.55 1.35022 11.236 70.02<br />

71.5 1.4655 1.4600 70.04 1.35327 11.261 70.50<br />

72.0 1.4667 1.4612 70.54 1.35633 11.287 70.99<br />

55% HFCS<br />

11.0 1.3492 1.3456 10.90 1.04418 8.689 11.00<br />

76.5 1.4774 1.4716 74.84 1.38454 11.522 75.38<br />

77.0 1.4786 1.4728 75.31 1.38769 11.548 75.87<br />

77.5 1.4798 1.4740 75.78 1.39084 11.574 76.35<br />

Source: Complied from CRA, ISBT, and ICUMSA.<br />

values can be mathematically converted between the two units and, for the convenience<br />

of those more familiar with RBU color, that conversion equation is as<br />

follows:<br />

RBU <br />

CRA 100 0.0417<br />

0.0479<br />

The most commonly tested attributes are dry solids and pH, probably because<br />

many quality control laboratories are equipped to perform these tests. Dry solids<br />

are determined by refractometer. Many refractometers are calibrated with the<br />

Brix scale rather than refractive index. For sucrose solutions, Brix corresponds<br />

to percent solids in solution. The term Brix cannot be used when designating<br />

solids concentrations in other nutritive sweetener solutions such as invert sugars,<br />

HFCS, and corn syrups (8). From Table 8 it can be seen that for HFCS products<br />

the refractive index-Brix relationship is not the same as the refractive indexsolids<br />

relationship. For 42% HFCS, the Brix value is roughly 1.4 less than the<br />

actual delivered solids, and for 55% HFCS, the difference is about 1.7. The difference<br />

is less at lower solids levels and at 10% solids the difference is only 0.1°<br />

Brix. Also, it is important to realize the effect of temperature on the converted<br />

dry solids value. There is a 0.1% solids error in the dry solids reading for every<br />

1°C difference from 20°C. For example a refractive index or Brix reading taken<br />

at 25°C will result in a 77.0% solids value being reported as 76.5%.

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