The following are true concerning proficiency testing (PT) except

1. An approved PT program must be implemented on all analytes on the regulated analyte list
2. Analytes not on the regulated analyte list do not require PT
3. For routine chemistry PT is performed three times per year with five challenges for each test
4. Quality control material is not an acceptable substitute for PT

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Answer rating: 100% (QA)

Proficiency testing is a way to ensure that laboratories are performing tests correctly and producin... View the full answer