Brookfield AMETEK

Apple Juice

Laboratory Viscometer Application Data Sheet

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-502P Programmable, Refrigerated Bath
  • Speed, rpm: 50, 75 and 100 rpm

The Enhanced UL Adapter may be used with various Brookfield Viscometers or Rheometers. In our example, we used a Brookfield LVDV-III+, with Rheocalc v3.1 software for automated instrument control and data acquisition. Our test temperatures of 4C and 25C were maintained by direct immersion of the Enhanced UL Adapter sample chamber into a TC-502P Programmable, Refrigerated Bath. Representative data from the analyses are shown in Figure 1:


Figure 1: Apple Juice at 4C and 25C.

The Figure 1 graph shows relatively constant viscosities at 4C (Blue Data: 2.5cP) and 25C (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 4C, than at 25C. Increasing temperature typically decreases the viscosity of a given substance.