Chain of Custody – Specimen Acceptability
Situations justifying NOT testing a drug screen:
(An explanatory remark is reported)
- No security seal, or a broken seal.
- Quantity not sufficient. If the screen is positive there must be enough left to confirm and to save another aliquot in long term storage for repeating the confirmation.
- Absorbance in the cuvette is above the screen analyzer range or severe interference is evident.
- There is a defect in the chain of custody. For example, collector signature missing on the request form.
Situations justifying a comment added to the drug screen report:
- The security seal was not dated, initialed by the donor and/or not signed by the collector.
- The specimen has an abnormal odor or color.
- The specimen had an abnormal temperature when collected or temperature not documented.
- The specimen delivery was abnormally slow and/or evidence of deterioration was present.
- Method of donor ID was not indicated on the request form.
- Dates are missing or incomplete on chain of custody form.
- Specimen dilute: Urine creatinine <20 mg/dL or specific gravity <1.004.
- Evidence that the sample is not urine. For example, the creatinine is zero and the specific gravity is normal.
- Evidence that the sample was adulterated.