Iowa Administrative Code
Agency 641 - Public Health Department
Chapter 12 - Approval of Confirmatory Laboratories for Private Sector Drug-free Workplace Testing
Rule 641-12.7 - Analytical Quality Control
Universal Citation: IA Admin Code 641-12.7
Current through Register Vol. 47, No. 6, September 18, 2024
The number and position of control specimens tested within a batch and the number of calibrators used for each batch of specimens shall be consistent with generally accepted laboratory practice for the methodology used to conduct confirmatory testing.
(1) Positive and negative controls shall be used in testing each batch of specimens.
(2) Procedures shall be implemented and documented to ensure that carryover from a positive specimen does not contaminate other subsequent specimens in that batch.
(3) Approved laboratories shall develop criteria for the detection and rejection of adulterated samples.
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