International Sugar Journal
The Blackboard

Analysis of sugar mixtures (part II) [Registered]

For the analysis of sugar mixtures Browne & Zerban (1948) use total solids by drying, which is an accurate but lengthy procedure; reading a refractometer Brix is simpler but requires the corrections described below. F and G have an effect on the refractometer reading (20ᵒC and 589nm) because the calibration is based on a pure sucrose solution: F, G and S have different refractive index/concentration relationships. A correction, Δ which applies whether S is present or not, is available (ICUMSA, 1998), its magnitude depending on both the total solids and the concentrations of F and G: where win’ is the invert…

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