Drying and humidity standardization of substances

Drying

1. Weight the substance on a weighing scale, and write down the value.
2. If possible, make a fine powder by rubbing the substance through a coarse strainer, and then with a fine strainer, to speed up the drying process.
3. Dry the chemical with silica gel in a sealed container.

• Use completely dried silica gel (can be heat in microwave for 5 minutes at 800W) in a sealed container, and weigh samples until they don't lose any weight, which indicates that it's completely dry.
• Weight the substance again, and divide it with the weight in step 1, to calculate the loss of weight in percentage.

Expected loss of substances

Cannabis

• 10-20%.

Powders

• 40% weight from large moist lumps.
• 50% or more from a paste.