Specimen validity testing refers to the tests conducted by laboratories to incline if a urine sample is diluted, adulterated or substituted. Prior to urine drug testing, specimen validity test is conducted to know whether the specimen is tampered or not. To report a specimen as tampered, laboratories conduct an initial strength test and a confirmatory validity test. Oxidants, Creatinine, Specific Gravity and PH are few substances detected in specimen validity test.

Why to conduct specimen validity test?

Specimen validity test examines the validity of specimen i.e., up to in what condition many hours the urine specimen be able to exist used for any drug testing to get appropriate results and to bring to light any substance of abuse, which does not present in normal piss specimen. A specimen containing the minimum level of Creatinine and specific gravity values is identified as diluted.

Adulterants tested in sample efficacy test

Adulteration expedient tampering urine specimen with an intention of beating the medicine tests. Specimen validity test determines adulterants presence in the specimen, which are discussed below.

Source: http://bytepowered.org/articles/Article/Know-About-Specimen-Validity-Test-and-Adulterants-Tested-In-It/23681

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