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The classic laboratory method of measuring high-level moisture in solid or semi-solid materials is loss on drying. [4] In this technique, a sample of material is weighed, heated in an oven for an appropriate period, cooled in the dry atmosphere of a desiccator, and then reweighed.
A variety of techniques may be used including Karl Fischer titration and loss on drying. Many technical standards exist which define test methods for determining moisture in different types of food. Food moisture content can impact food safety, food quality, shelf life, texture, legal compliance, and consumer acceptance.
Loss on ignition (LOI) is a test used in inorganic analytical chemistry and soil science, particularly in the analysis of minerals and the chemical makeup of soil. It consists of strongly heating ( "igniting" ) a sample of the material at a specified temperature, allowing volatile substances to escape, until its mass ceases to change.
KF is selective for water, because the titration reaction itself consumes water. In contrast, measurement of mass loss on drying will detect the loss of any volatile substance. However, the strong redox chemistry (SO 2 /I 2) means that redox-active sample constituents may react with the reagents.
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Equilibrium moisture content of wood versus humidity and temperature, according to the Hailwood-Horrobin equation. The equilibrium moisture content (EMC) of a hygroscopic material surrounded at least partially by air is the moisture content at which the material is neither gaining nor losing moisture.
Best for blow drying Living Proof Full Thickening Blow-Dry Cream This is a a great option for fine hair, according to Collins, who explains that fine gray hairs can appear limp and lack volume.
The formula includes lipo-hdydroxy acid — LHAs — which gently renews the skin cell-by-cell to lead to surface exfoliation that unveils brighter skin with fewer wrinkles and age spots.