![]() ![]() These analysers incorporate an electronic balance with a sample tray and surrounding heating element. Because the manual laboratory method is relatively slow, automated moisture analysers have been developed that can reduce the time necessary for a test from a couple of hours to just a few minutes. If the volatile content of the solid is primarily water, the loss on drying technique gives a good measure of moisture content. 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. The classic laboratory method of measuring high-level moisture in solid or semi-solid materials is loss on drying. While both terms are sometimes used interchangeably, these two parameters, though related, are different measurements. Both can be used as a measure of the amount of moisture in a gas and one can be calculated from the other fairly accurately. This parameter is inherently related to the moisture content, which defines the amount of water molecules as a fraction of the total. ![]() Moisture dew point is the temperature at which moisture condenses out of a gas. Moisture content measurements can be reported in multiple units, such as: parts per million, pounds of water per million standard cubic feet of gas, mass of water vapor per unit volume or mass of water vapor per unit mass of dry gas. Fields that require moisture measurement in gasses or liquids include hydrocarbon processing, pure semiconductor gases, bulk pure or mixed gases, dielectric gases such as those in transformers and power plants, and natural gas pipeline transport. Trace moisture in solids must be known in processes involving plastics, pharmaceuticals and heat treatment. There are many applications where trace moisture measurements are necessary for manufacturing and process quality assurance. For example, moisture (usually measured as a percentage) is a common specification in commercial food production. Moisture analysis covers a variety of methods for measuring the moisture content in solids, liquids, or gases. JSTOR ( August 2016) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed.įind sources: "Moisture analysis" – news Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification. ![]()
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