USE
Apple juice is consumed as a beverage.
TEST EQUIPMENT
Instrument:
• Viscometer or Rheometer
• Spring Torque Range: LV
• Spindle: YULA-15E
Accessories:
• Enhanced UL Adapter (ULA-EY),
• TC-650SD Programmable Refrigerated Bath
• Speed: 50, 75 and 100 rpm
TEST METHOD
The Enhanced UL Adapter may be used with various Brookfield Viscometers or Rheometers. In our example, we used a Brookfield DV3TLV, with RheocalcT software for automated instrument control and data acquisition. Our test temperatures of 4°C and 25°C were maintained by direct immersion of the Enhanced UL Adapter sample chamber into a TC-650SD Programmable Refrigerated Bath. Representative data from the analyses are shown in Figure 1.
Figure 1
Figure 1 graph shows relatively constant viscosities at 4°C (Blue Data: 2.5cP) and 25°C (Red Data: 1.4cP) over the speed range tested. This type of flow behavior is referred to as “Newtonian”. The graph also shows that the apple juice viscosity is higher at 4°C, than at 25°C. Increasing temperature typically decreases the viscosity of a given substance.
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