Brookfield Engineering

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 4°C and 25°C 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 4°C and 25°C.

The 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.