Cold water extraction: Difference between revisions

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For improved extraction, it's recommended to do an acetone wash (not covered in this guide) before you do the CWE, but it is not required.

# ~~Weight the substance, and write down the value.~~

# Conditionally but recommended: Dry the substance, see [[drying and humidity standardization of substances]].

~~# For lumped substances~~: ~~Break them apart, and sift the powder with a coarse strainer, and then with a fine strainer, to make them easy to dissolve.~~

~~# Conditionally, dry~~ the substance ~~to calculate how solvents/water that the batch contained. 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. Expect a loss~~ of ~~up to 40% weight from large moist lumps, and 50% or more from a paste~~.

# Add the fine powder to a glass jar, and add 10 times more boiling water than the quantity of the substance, and shake well for 10 seconds. This should precipitate the soluble substances in the water.

# Let the water cool down to room temperature.

@@ Line 9: / Line 9: @@
 For improved extraction, it's recommended to do an acetone wash (not covered in this guide) before you do the CWE, but it is not required.
-# Weight the substance, and write down the value.
+# Conditionally but recommended: Dry the substance, see [[drying and humidity standardization of substances]].
-# For lumped substances: Break them apart, and sift the powder with a coarse strainer, and then with a fine strainer, to make them easy to dissolve.
-# Conditionally, dry the substance to calculate how solvents/water that the batch contained. 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. Expect a loss of up to 40% weight from large moist lumps, and 50% or more from a paste.
 # Add the fine powder to a glass jar, and add 10 times more boiling water than the quantity of the substance, and shake well for 10 seconds. This should precipitate the soluble substances in the water.
 # Let the water cool down to room temperature.