Tests & Pricing

Marygold Laboratories offers a variety of tests and testing packages for hemp and medical marijuana. 

Test Descriptions

Pesticides Testing

MaryGold Laboratories utilizes LC MS/MS to identify and quantify 59 pesticides in accordance with Arkansas medical marijuana regulations. Our pesticides test covers the following analytes:

Abamectin, Acephate, Acequinocyl, Acetamiprid, Aldicarb, Azoxystrobin, Bifenazate, Bifenthrin, Boscalid, Carbaryl, Carbofuran, Chlorantraniliprole, Chlorfenapyr, Chlorpyrifos, Clofentezine, Cyfluthrin, Cypermethrin, Daminozide, DDVP (Dichlorvos), Diazinon, Dimethoate, Ethoprophos, Etofenprox, Etoxazole, Fenoxycarb, Fenpyroximate, Fipronil, Flonicamid, Fludioxonil, Hexythiazox, Imazalil, Imidacloprid, Kresoxim-methyl, Malathion, Metalaxyl, Methiocarb, Methomyl, Methyl parathion, MGK-264, Myclobutanil, Naled, Oxamyl, Paclobutrazol, Permethrins, Phosmet, Piperonyl butoxide, Prallethrin, Propiconazole, Propoxur, Pyrethrins, Pyridaben, Spinosad, Spiromesifen, Spirotetramat, Spiroxamine, Tebuconazole, Thiacloprid, Thiamethoxam, Trifloxystrobin

Potency Testing

Our potency test measures 11 different cannabinoid concentrations using LC MS/MS. The cannabinoids tested are: 


Microbiological Contaminants

Per Arkansas regulations, Marygold tests for coliform bacteria. If any are detected, E. coli must specifically be tested for. A batch of marijuana fails testing if there are more than 100 colony-forming units.

Tests are available for other microbes should you desire more stringent analysis. For example, clients may also wish to test for Salmonella, another potentially-dangerous type of bacteria. Please contact us for more information.

Water Activity and Moisture

Cannabis with the wrong amount of moisture and water activity is a welcoming host for microbial contamination. Storage and packaging are particularly vulnerable, so prior testing is required for safety.

Water activity is a measurement of the water available for bacterial and fungal growth. The “Aw” value ranges between 0 and 1. At values above .6, some growth can occur. Thus, by state regulations, Aw values over 0.65 fail the batch.

Moisture content refers to the concentration of water in a Cannabis sample. Ideal moisture content is 10-15%. Below 10%, the product tends to crumble; a value over 15% must be reported but does not fail the sample. Since cannabinoid potency is commonly reported for the dry weight of the plant, moisture testing is required for accurate potency testing.


Exposure to toxic substances can jeopardize the health of medical marijuana patients. Among the list of dangerous contaminants are heavy metals, when in a high enough dose.

Metals are usually present in fertilizer. Growing Cannabis plants absorb these metals. Patients who use this Cannabis are then exposed to the contaminants, which accumulate in the body and are difficult to remove. It is crucial that any contaminants present in the fertilizer, and subsequently the plant, are in low amounts.

Cannabis, by law, is allowed to contain a very small amount; at levels too high, the product is deemed dangerous and fails the test.

Per Arkansas regulations, inorganic Arsenic, Cadmium, Lead, and total Mercury must be tested for. Marygold Laboratories utilizes ICP-OES and a Mercury Analyzer for metals testing.

For clients seeking more rigorous standards, testing for additional metals and chemicals is available upon request.


Terpenes are fragrant oils that give herbs, fruits, and many plants, including Cannabis, their diverse odors. Each type of terpene has a particular aroma, therapeutic effect, and potential medical benefit. Thus, testing for terpenes has become commonplace because of its interest to patients. To quantify terpenes in medical marijuana, Marygold Lab uses headspace-GC MS/MS. While not required by state law, we recommend terpene profiling for the benefit of patients.

Residual Solvents

MaryGold Laboratories utilizes Headspace-GC MS/MS to identify and quantify traces of residual solvents in cannabis extracts and concentrates at the part per million (ppm) level. 

Per Arkansas regulations, product is exempt from solvent testing if:

1) a mechanical extraction method was used in place of a solvent.

2) the solvent was water, animal fat, or vegetable oil.

Marygold Laboratories, in accordance with Arkansas state regulations for medical marijuana, tests for the following solvents:

1-Butanol, 1-Pentanol, 1-Propanol, 1,2-Dimethoxyethane, 1,2-dimethylbenzene (o-Xylene), 1,3-dimethylbenzene (m-Xylene), 1,4-dimethylbenzene (p-Xylene), 1,4-Dioxane, 2-Butanol, 2-Butanone, 2-Ethoxyethanol, 2-methylbutane, 2-Methylpentane, 2-Propanol (Isopropyl Alcohol), 2,2-dimethylbutane, 2,3-dimethylbutane, 3-Methylpentane, Acetone, Benzene, Butane, Cumene (Isopropyl Benzene), Cyclohexane, Dichloromethane (Methylene Chloride), Dimethyl Sulfoxide, Ethanol, Ethyl Acetate, Ethyl Ether, Ethylbenzene (Ethylene Benzene), Ethylene Glycol, Ethylene Oxide, Heptane, Isopropyl Acetate, Methanol, Methylpropane (Isobutane), n-Hexane, N,N Dimethylacetamide, N,N Dimethylformamide, Pentane, Propane, Pyridine, Sulfolane, Tetrahydrofuran,Toluene

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