Certificate of Analysis (COA) & Third-Party Lab Results
Certificate of Analysis (COA) & Third-Party Lab Results
Last updated: May 12, 2026 · By Arkos Bioscience Science Team
Every batch of Arkos NanoCBD is tested by an ISO 17025-accredited third-party laboratory (Infinite Chemical Analysis Labs, San Diego, CA) using validated analytical methods. Results verify cannabinoid potency (CBD content within label claim), THC content below 0.0% detection thresholds, and the absence of heavy metals, pesticides, residual solvents, and microbial contaminants. Certificates of Analysis are available below for each product, organized by batch.
Why Certificates of Analysis Matter
The CBD industry is self-regulated, which means consumers cannot rely on a government agency to verify that a product contains what its label states. A Certificate of Analysis (COA) issued by an independent laboratory is the primary mechanism by which responsible brands provide that verification. Without a COA, there is no objective way to confirm CBD potency, THC compliance, or contaminant safety.
Third-party testing is the critical distinction: an in-house quality check carries inherent conflicts of interest, whereas a COA from an independent laboratory has no financial stake in the outcome. ISO 17025 accreditation raises the bar further, it is the globally recognized standard for laboratory competence, requiring that a testing facility demonstrate validated methods, calibrated instrumentation, trained personnel, and a documented quality management system audited by an independent accreditation body.
COA testing covers the full safety and accuracy profile of a CBD product: cannabinoid potency confirms the product matches its label claim; THC screening confirms legal and safety compliance; heavy metal panels screen for lead, arsenic, cadmium, and mercury that may originate from hemp cultivation soil; pesticide screens check for agricultural chemical residues; residual solvent testing confirms that extraction processes left no harmful chemical traces; and microbial testing identifies potential pathogens. Together, these panels give consumers a complete, evidence-based picture of exactly what they are putting in or on their body.
Our Testing Standards
Arkos Bioscience partners with independent ISO 17025-accredited cannabis testing laboratories for all batch testing. No batch is released for sale until it has passed every panel listed below.
Analytical Methods
Tests Performed on Every Batch
- › CBD (cannabidiol)
- › THC (delta-9-tetrahydrocannabinol)
- › CBG (cannabigerol)
- › CBN (cannabinol)
- › CBC (cannabichromene)
- › Lead (Pb)
- › Arsenic (As)
- › Cadmium (Cd)
- › Mercury (Hg)
- › Full CA Bureau of Cannabis Control panel
- › Organophosphates & organochlorines
- › Pyrethroids & carbamates
- › Ethanol
- › Methanol
- › Acetone, isopropanol & other ICH Q3C Class 2/3 solvents
- › E. coli
- › Salmonella spp.
- › Total yeast & mold count
- › Mycotoxins (aflatoxins, ochratoxin A)
- › Water activity (aw)
Product Certificates of Analysis
The table below lists publicly available COAs for Arkos NanoCBD products. To request the latest batch-matched COA for the specific bottle in your hand, email support@arkosbio.com with your batch number (printed on the bottle's label). All testing was performed by Infinite Chemical Analysis Labs (San Diego, CA · ISO 17025-accredited cannabis testing facility · State Lic# C8-0000047-LIC).
How to Read a Certificate of Analysis
COA documents can appear technical, but five key areas tell you everything you need to know about a product's safety and accuracy.
Check the "CBD" or "Total Cannabidiol" result in the cannabinoid potency section. A reputable product's measured CBD content should fall within ±10% of the labeled amount. If a bottle claims 300mg, the COA should confirm approximately 270-330mg per container.
Look for the delta-9-THC result. For a THC-free product, this value should read "ND" (not detected) or "BDL" (below detection limit), meaning no measurable THC was found. Any value above 0.3% by dry weight would indicate a non-compliant product under federal hemp regulations.
The heavy metals section should show "Pass" for each metal tested (lead, arsenic, cadmium, mercury), or individual values below established action limits (e.g., California DPH limits or USP <232> elemental impurity guidelines). Hemp is a bioaccumulator, metals testing is non-negotiable.
Every pesticide on the tested panel should read "ND" (not detected). Even a single detected pesticide above the action limit constitutes a failed test. A full California Bureau of Cannabis Control panel tests for over 60 different pesticide compounds, confirm the lab tested a comprehensive list, not just a few common ones.
The microbial section should show "Pass" or "Not Detected" for pathogens such as E. coli and Salmonella, and total yeast and mold counts should fall within acceptable limits. A failed microbial test is a serious safety concern and would mean that batch should never reach consumers.
Frequently Asked Questions
What is a Certificate of Analysis?
A Certificate of Analysis (COA) is an official document issued by an independent, accredited laboratory confirming the results of testing for a specific product batch. For CBD products, a COA verifies cannabinoid potency, THC content, and the absence of contaminants including heavy metals, pesticides, residual solvents, and microbial pathogens.
How often does Arkos test its products?
Arkos tests every production batch before it is released for sale. This means a new COA is generated each time a product batch is manufactured, not just once per formulation. Customers can always request the COA matching the specific batch number printed on their bottle's label.
What testing methods does Arkos use?
Arkos uses industry-standard analytical chemistry methods: HPLC for cannabinoid potency profiling, ICP-MS for heavy metals detection, and GC-MS for pesticide residues and residual solvents. All testing is performed by ISO 17025-accredited independent cannabis testing laboratories in the USA.
Is Arkos NanoCBD THC-free?
Yes. Every batch of Arkos NanoCBD products is tested for THC content. Results consistently fall below 0.0% detection thresholds, meaning no detectable THC is found. The COA for each batch includes the full cannabinoid potency profile confirming this result. Customers who need documentation can request the relevant COA at any time.
Why does ISO 17025 accreditation matter?
ISO 17025 is the international standard for the competence of testing and calibration laboratories. Accreditation means an independent body has audited the laboratory's methods, equipment, and quality systems. For CBD testing, it ensures that cannabinoid potency results and contaminant screens are accurate, reproducible, and traceable, not self-reported figures from an unverified source.
How do I request a COA?
Email support@arkosbio.com with the product name and batch number from your bottle's label. We will respond with the matching Certificate of Analysis within one business day. The batch number is printed on the bottom or side of every Arkos product package.
Email support@arkosbio.com with the product name and batch number from your bottle's label, and we will send the matching Certificate of Analysis within one business day.
The batch number is printed on the bottom or side panel of every Arkos NanoCBD package. Use the format from the table above (e.g., 2026-HPT-05) for the fastest response.
Sources
- National Center for Biotechnology Information, Cannabidiol pharmacokinetics, absorption, and bioavailability
- Frontiers in Nutrition, Oral CBD bioavailability and nano-encapsulation research
- Molecules (journal), Nano-encapsulated delivery systems for cannabinoids
- European Journal of Pharmaceutics and Biopharmaceutics, Drug bioavailability, nanoformulations, and ISO 17025 analytical standards