▶ Sample from：Guangzhou Industry University

The samples are heavy oil, thick with high viscosity. Sample 2# even has higher viscosity.

▶ Instrument：Shanghai Insmark Automatic Refractometer IR180 

▶ A number of experiments have been taken in the Insmark laboratory, it is proved that the measurement results have good repeatability at 25.0℃.

▶ Measuring temperature: 25.0℃:

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▶ IP-digi2 Polarimeter (Thermostat control system – Peltier)

   Method: Optical Rotation

   Temperature setting: 20.0 ℃, thermostat control system is on.

   Thermostat-sample tube length: 1dm

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▶ Add sample solution into the thermostat sample tube, put it in the sample chamber and take the measurement readings.

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▶ Calculation:

   Calculate the content of the Fructose(%) in the Fructose syrup according to the formula:

 α- Optical Rotation of the sample

 L - length of the thermo-sample tube（dm）

 G - solid content of the sample(%)

 T - temperature of the sample（℃）

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  3.Conclusion:

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  The combine usage of Refractometer and Polarimeter provides an easy, quick, repeatability measurement method for the Fructose analysis.

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