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Documentation guide

How to Read a Certificate of Analysis

A Certificate of Analysis, often shortened to COA, is a supporting record that summarizes document identifiers, batch references, test categories, acceptance criteria, and reported results.

Fields to Review

Document identity

Check the document title, issuing laboratory or supplier, revision date, and any document number or reference code.

Batch or lot reference

Confirm that the batch, lot, or internal reference on the COA matches the material record being reviewed.

Tests performed

Review which tests were performed and whether the document explains the method or reference standard used.

Acceptance criteria and results

Compare reported results with listed limits or criteria, and note any fields that require clarification.

Step-by-Step Review Workflow

1. Confirm document scope

Identify whether the document is a COA, specification sheet, storage note, or general supporting record.

2. Match identifiers

Compare material name, size, lot reference, document date, and any revision number against the intake log.

3. Review test rows

Look for test categories, reported results, units, method references, and acceptance criteria when listed.

4. Record open questions

Write down missing fields, unclear terminology, or mismatched identifiers before contacting support.

Documentation Review Checklist

  • Material name and size are recorded consistently.
  • Batch or lot reference is visible and traceable.
  • Testing categories and results are clearly listed.
  • Acceptance criteria, limits, or expected ranges are stated where applicable.
  • Storage notes, retest dates, or expiration fields are saved with the record.
  • Questions are routed to support before internal records are finalized.

Suggested Review Notes

Keep review notes procedural. A strong note explains what was checked, what matched, what was unclear, and whether support clarification was requested. Avoid rewriting a COA into claims that are not present in the source record.

Record source

Save the file name, source, date received, and reviewer initials with the internal documentation record.

Record match

Note whether the material name, size, and lot or batch reference match the label or intake log.

Record gaps

List missing fields, unclear units, unreadable references, or fields that need support clarification.

Record outcome

Use neutral outcomes such as reviewed, clarification requested, or held pending documentation.

Why This Matters

Documentation review supports traceability. NIH-style laboratory recordkeeping guidance emphasizes sufficient detail for research records, and laboratory quality systems often treat documents and records as core quality elements.

Common Review Outcomes

Common documentation review outcomes
OutcomeUse whenNext step
ReviewedIdentifiers and document fields are clear enough for internal filing.Save with intake record.
Clarification requestedA field is missing, unclear, or conflicts with another record.Contact support and keep the request with the record.
Held pending recordThe needed document is not yet available or has not been matched.Do not finalize the internal review until resolved.

Related Sources

This guide is informed by general source categories for laboratory records, quality-system documents, SDS-style documentation, and batch traceability.