Section 149.25. Treatment of proficiency testing samples by laboratories.

 

(1)  Proficiency testing samples shall be subjected to any preparatory steps undergone by analytical samples, unless the preparation instructions submitted by a provider specifically instruct omitting a preparatory step.

(2)  Laboratories may report multiple results of multiple analyses of a single proficiency testing sample when a laboratory maintains certifications or registrations for multiple techniques for any analyte or analyte group in aqueous and solid matrices.

(3)  Laboratories may report multiple results of a single proficiency testing sample when the laboratory maintains certifications for multiple methods for any analyte or analyte group in the drinking water matrix.

(4)  Prior to submitting proficiency testing results to a proficiency testing sample provider:

(a) Laboratories may not send a proficiency testing sample, or portion of a proficiency testing sample to another laboratory for analysis.

(b) Laboratories may not knowingly analyze a proficiency testing sample, or a portion of a proficiency testing sample from another laboratory.

(c) Laboratories may not communicate results of a proficiency testing sample with another laboratory.

History: CR 06-005 : cr. Register April 2008 No. 628 , eff. 9-1-08.

Note

Preparatory steps include digestions, distillations, extractions, concentrations and dilutions. Microsoft Windows NT 6.1.7601 Service Pack 1