Ask X3What does 49 CFR 40.179 (What does the second laboratory do with the split specimen when it is tested to reconfirm an adulterated test result?) require?
Generated guidance. Confirm the source and its applicability before you act. How we check sources.
Based on 49 CFR 40.179, when the second laboratory tests a split specimen to reconfirm an adulterated test result, it must:
1. Test the split specimen specifically for the adulterant that was detected in the primary specimen.
2. Use the proper confirmatory test for that adulterant, following the criteria in § 40.89 or § 40.93 and the confirmatory cutoff levels required by the HHS Mandatory Guidelines.
3. If the test fails to reconfirm the adulterant result found in the primary specimen, the laboratory may send the specimen (or an aliquot of it) to another HHS-certified laboratory that is capable of running another reconfirmation test.
Related questions
What does 49 CFR 40.181 (What does the second laboratory do with the split specimen when it is tested to reconfirm a substituted test result?) require? — Ask X3What does 49 CFR 40.177 (What does the second laboratory do with the split specimen when it is tested to reconfirm the presence of a drug or drug metabolite?) require? — Ask X3What does 49 CFR 40.187 (What does the MRO do with split specimen laboratory results?) require? — Ask X3What does 49 CFR 40.171 (How does an employee request a test of a split specimen?) require? — Ask X3