The method used to determine the concentration of a nutrient or component in a substance after all moisture has been removed, expressed as a percentage of the dry weight, is crucial in fields dealing with variable moisture content materials. For example, a feed analysis reporting protein levels on this basis allows for a more accurate comparison between different feedstuffs, as the varying water content has been factored out.
This calculation is important because moisture levels can fluctuate significantly, influencing the apparent concentration of other components. By standardizing the measurement to a water-free state, a more reliable evaluation of the nutritional value, quality, or composition can be achieved. This is particularly relevant in agriculture, food science, and environmental analysis, where accurate comparisons and formulations are required. Historically, this process has been essential for determining the true value and characteristics of substances prone to moisture changes.