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Refractometry
What is refractometry?
Comment
In the paragraph above you read that using the auxiliary quantity "makes it easier to handle the
polynom. For the sake of completeness the coefficients for the third-order polynomial with the auxil-
iary quantity" are listed in the following:
Accordingly, if you compute with using the refractive index:
c
Not only that the coefficients are more "unhandy", bigger numbers are used as well. If you, by way
of example, calculate the two polynoms step by step you will get for the one with the auxiliary quan-
tity r = 0.051149.
And for the one with the according refractive index ri = 1.381149
Brix = -11783.327 + 31558.159 - 28444.310 + 8699.485 = 30.007
16
(continued)
(continued)
c
= 12.093 c
= 707.774 c
1
2
... all others are zero
= 11783.327 c
= 22849.207 c
1
2
... all others are zero
Brix = -2.093 + 36.202 - 4.543 + 0.442 = 30.008
= 1736.434 c
= 3301.961
3
4
= 14911.260 c
= 3301.961
3
4
1400700-101 Rev. A
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