Primary specimen.

Primary specimen. In drug testing, the specimen bottle that is opened and tested by a first laboratory to determine whether the employee has a drug or drug metabolite in his or her system; and for the purpose of specimen validity testing. The primary specimen is the portion of the donor's subdivided specimen designated as the primary (A) specimen by the collector to distinguish it from the split (B) specimen, as defined in this section.

Source

49 CFR § 40.3

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Scoping language

In this part, the terms listed in this section have the following meanings:

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