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Model rva super3

Manufactured by Newport Scientific
Sourced in Australia

The Model RVA‐SUPER3 is a rapid visco analyzer designed for the analysis of the pasting properties of starch and other food-related materials. It measures the changes in viscosity of a sample as it is heated and cooled under controlled conditions.

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2 protocols using model rva super3

1

Pasting Viscosity Analysis of Flour Blends

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Pasting viscosity of the flour blends was determined as described by AACC (2001) using a Rapid Viscosity Analyzer (RVA–1998, Model RVA‐SUPER3; Newport Scientific, Australia). Pasting temperature, peak viscosity temperature, peak viscosity during heating and viscosity on cooling to 50°C were recorded.
Briefly, 3 g of flour samples was weighed into a dry empty canister; 30 ml of water was added and thoroughly mixed before fitting into the visco analyzer. Each suspension was kept at 50°C, then heated up to 95°C at 12.2°C per min and held for 2.5 min at this temperature. The suspension was then cooled to 50°C at 12.0°C and held for 2 min at 50°C. All determinations were in triplicates, and the mean value was recorded in each case.
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2

Starch Pasting Behavior Analysis

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Pasting behavior of samples was measured with a Rapid Visco Analyser (Model RVA-Super 3, Newport Scientific, Warrie-wood, NSW, Australia), which was controlled by the Thermocline software (version 2.3, Newport Scientific Pty Ltd.). A starch suspension sample prepared by mixing starch in deionized water at a ratio of 7:100 (w/w) was gradually heated (while being stirred at 160 rpm) from 50°C to 95°C at a rate of 7.5°C/min, and held at 95°C for 5 minutes. After that, the mixture was cooled from 95°C to 50°C at the same rate and then held at 50°C for 20 minutes. The viscosity of starch suspension samples was expressed by the rapid viscosity unit (RVU). The peak viscosity (maximum viscosity during pasting), breakdown viscosity (difference between the peak viscosity and minimum paste viscosity), setback viscosity (difference between the final viscosity and minimum viscosity during pasting), final viscosity, and pasting temperature were also determined.
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