Brookfield AMETEK

Nectar (Apricot, Various Flavors)

Laboratory Viscometer Application Data Sheet

USE

Apricot nectar is consumed as a beverage.

Test Equipment:

  • Instrument: Standard Viscometer or Rheometer
  • Spring Torque Range: LV
  • Spindle: YULA-15E
  • Accessories: Enhanced UL Adapter (ULA-EY), TC-502P Programmable, Refrigerated Bath
  • Speed, rpm: 10, 20 and 30 rpm at 4 C; 10, 20, 30, 40, 50, 60 and 70 RPM at 25 C

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. The product, as instructed on its container, was shaken well prior to testing. 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: Apricot Nectar at 4C and 25C.

The Figure 1 graph shows, at both test temperatures, viscosity decreasing as speed is increased. This type of flow behavior is sometimes referred to as "shear-thinning" or "pseudoplastic". The graph also shows that the apricot nectar viscosity is higher at 4C, than at 25C. Increasing temperature typically decreases the viscosity of a given substance.