Moisture Content Analysis
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What is Moisture Content?
Moisture content is the quantity of water contained in a sample.
How do you measure Moisture Content?
Moisture content is measured by loss on drying. This process occurs by weighing a sample, drying the sample and then reweighing the sample. The difference in weight divides by the initial weight will give you the Moisture Content of a sample.
How is Moisture Content calculated?
%MC(Moisture Content) = ((Initial weight-Final weight)/Initial weight) x 100%
Is Moisture Content the same as Water Activity?
No. These two parameters are often confused, but they are NOT the same thing. Moisture content measures the total amount of water in a given sample, where as water activity measure the amount of water that can react in a sample.
Why does Moisture Content Matter?
Moisture content matters for several reasons. Perhaps the most important is regulatory requirements. Certain States, such as California, have requirements for the %MC in a sample. If the measured percent is above 13%, the sample must be failed.
Additionally, knowing the %MC can give you an idea of the curing process. Cannabis with high levels may not have been completely or properly cured.
%MC is often a useful parameter to know when detecting trends in extraction efficiency for producers.
What is an ideal level?
Ideally, moisture content of cured cannabis should be between 6-9%MC. Fresh cannabis typically contains about 80%MC.
What instruments do we recommend for Moisture Content Analysis of cannabis flower?
We recommend the Ohaus MB120 Moisture Analyzer for moisture content analysis. This analyzer provides a fast determination of %MC (typically less than 5 minutes).
We can also provide you with the appropriate method to use with your new Ohaus MB120 Moisture Analyzer.