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AACC International Approved Methods -AACC Method 56-35.01. Method for Determining Water Hydration Capacity and Percentage of Unhydrated Seeds of Pulses

AACC International Approved Methods

Physicochemical Tests

AACCI Method 56-35.01
Method for Determining Water Hydration Capacity and Percentage of Unhydrated Seeds of Pulses

VIEW METHOD

Objective
This test describes a method to determine the capacity of whole pulse seeds to absorb water and to calculate the percentage of unhydrated seeds. It is applicable to all pulse crops, such as field peas, beans, chickpeas and lentils. Hydration capacity of pulses is defined as the amount of water that whole seeds absorb after soaking in excess water for 16 hr at room temperature (22 ± 2°C) and is expressed as the amount of water absorbed per 100 g of seeds. Some seeds remain entirely or partially unswollen after 16 hr of soaking at room temperature. See Notes 1 and 2. These are defined as unhydrated seeds. The number of unhydrated seeds is expressed as a percentage of the total number of seeds.