Batch testing

Batch testing is the practice of analyzing a sample from every production batch before release so that each lot can be shown to meet its specifications.

A batch is a defined quantity made in one run from the same inputs under the same conditions; because raw hemp, extraction and mixing vary, one batch cannot vouch for the next. A typical hemp product batch is tested for cannabinoid potency, and often for residual solvents, pesticides, heavy metals, mycotoxins and microbial contamination, with results recorded on a certificate of analysis tied to the batch or lot number printed on the package. Samples are usually retained so the batch can be retested if a question arises.

Batch testing is required by cGMP for dietary supplements and by many state hemp programs, and it is the foundation of traceability and recalls. Consumers use it by matching the batch number on a label to the certificate published for that batch; a certificate for a different lot, or one without a batch number, does not verify the product in hand. Third-party testing means the batch was analyzed by an independent laboratory rather than the manufacturer alone.