Preservative Efficacy & Microbial Challenge Testing
Evaluate a preservation system under a defined challenge protocol. A successful laboratory challenge is not a universal shelf-life or in-use contamination claim.
Methods, applicability and limitations
High-level scope references only, not standards text or a claim about a current edition. Confirm product applicability, adopted edition, jurisdiction and provider authorization before ordering.
- USP <51> concerns antimicrobial effectiveness for relevant pharmaceutical products; product category and acceptance framework matter.
- ISO 11930 concerns antimicrobial protection assessment of cosmetic products; it is not interchangeable with a pharmaceutical chapter.
- Neutralization, recovery and organism inoculum controls are critical when measuring survival over time.
Sample and project requirements
No universal sample quantity is promised. Ask the receiving provider to confirm containers, minimum amount, preparation, hazards, storage, transport and acceptance before collection or shipment.
- Formulation, product category, preservative system and container
- Intended market, challenge protocol, storage conditions and time points
- Suitability work, controls, log-reduction calculations and stated exclusions
Compare provider proposals
- Request the selected method, suitability work, controls, detection/reporting limits and stated exclusions.
- Confirm relevant experience, actual accredited or authorized scope where needed, subcontracting and quality responsibilities.
- Agree raw data, reviewed results, interpretation, confidentiality, price and a provider-confirmed schedule.
- Laboratory Vortex coordinates requests; independent providers perform the work. No capability, award, compliance or turnaround guarantee is implied.