Cannabis plants manufacture cannabinoids that determine the overall effect and strength of the strain. There are many different cannabinoids that all have distinct medicinal effects, however, most states only require testing and reporting for the dry weight percentages of tetrahydrocannabinol (THC) and cannabidiol (CBD).
Different types of metals can be found in soils and fertilizers
and as cannabis plants grow, they tend to draw in these metals
from the soil.
Heavy metals are a group of metals considered to be toxic and the most common include lead, cadmium, arsenic and mercury. Most labs are required to test and confirm that samples are under the allowable toxic concentration limits for these four hazardous metals.
The detection of pesticides in cannabis has been a challenge. Cannabis testing is required.
There are many pesticides that are used in commercial cannabis grow operations to kill the pests that thrive on the plants and in greenhouses. These chemicals are toxic to humans so confirming their absence from cannabis products is crucial. A majority of states require labs to test for an average of 18 different pesticides.
Residual solvents are chemicals left over from the process of
extracting cannabinoids from the cannabis plant. Common solvents
for such extractions include ethanol, butane, propane and hexane.
These solvents are evaporated to prepare high concentration oils and waxes. However, it is sometimes necessary to use large quantities of solvent in order to increase extraction efficiency and to achieve higher levels of purity. Since these solvents are not safe for human consumption, most states require labs to verify that all traces of the substances have been removed.
Moisture content is not a required test by most states. However,
moisture can be extremely detrimental to the quality of stored
Dried cannabis typically has a moisture content of 10-12%. A moisture content above 12% in dried cannabis is prone to fungal growth (mold).
As medical users may be immune deficient and are highly vulnerable to the effects of mold, constant monitoring of moisture is needed.
Most states mandate that cannabis-testing labs analyze samples for
any fungal or microbial growth...
resulting from production or handling, as well as mycotoxins, which is a class of toxins produced by fungi. With the potential to become lethal, continuous exposure to mycotoxins can lead to a buildup of progressively worse allergic reactions.
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