PinPoint Interlaboratory Split Sample Challenge

Split Sample Alternative Assessment

The PinPoint Interlaboratory Split Sample (P.I.S.S.) Challenge was created to help clinical and forensic laboratories ensure accuracy and reliability of their laboratory testing. When commercially available proficiency tests (PT) are not available, CLIA certified labs often have a gap in testing the robustness of their quality systems. Alternative Assessment using split sample analysis can fill that void by comparing results of a reference laboratory to other participating laboratories.


The P.I.S.S. Challenge facilitated by PinPoint Testing’s COLA/CLIA laboratory is an interlaboratory blinded split sample competency test. Participating commercial laboratories test blinded urine samples containing over 160 spiked drugs split among them. Labs return positive results to a PinPoint data analyst with their confirmed concentrations of observed drugs in a templated format. Results are tallied, and labs are provided a full report comparing their results to peer labs within 30 days.


P.I.S.S panel contains:

  • Synthetic Cannabinoids
  • Emerging & Classic Opioids
  • Stimulants
  • Emerging & Classic Benzodiazepines
  • Barbiturates
  • Antidepressants
  • Anticonvulsants
  • Alkaloids

Over 160 drugs | Samples manufactured and tested in an ISO 17025 Lab | Results returned in 30 days | Affordable

Your participation helps not just your own laboratory, but peer laboratories assess their quality programs objectively and with scientific rigor to ensure quality reports are being delivered to your customers.


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AR Children’s Hospital Research Institute
13 Children’s Way
Slot 841
Little Rock, Arkansas 72202