Proficiency testing samples are designed to be stable without refrigeration for the shipment period. They are made with preservatives to withstand shipping times. An ice pack is included (in most kits) to protect the PT samples against exposure to extreme temperatures during shipment. We do understand and expect that the ice pack may be thawed upon arrival and the samples may be warm. However, this will not affect the integrity of the samples.
If your kit experienced any service delays but still arrived the week of the shipment, the samples should still be okay to test and we advise you to make a note when you report your results.
- If reporting online, while on the result entry screen, click the Sample ID# and follow the on-screen instructions to report a test problem.
- If reporting on paper/by mail, make a note on the Comments page and include it with the rest of your worksheets when you mail them to API.
The majority of Microbiology PT samples do not require ice for shipment.
If you would like to discuss sample stability or a specific situation, please contact our Technical Support Department at TechSupport@api-pt.com.