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HelpTest Code ADLTX Adulterants Survey, Chain of Custody, Random, Urine
Additional Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| COCH | Chain of Custody Processing | No | Yes |
Specimen Type
UrineSpecimen Required
Supplies: Chain of Custody Kit (T282)
Container/Tube: Chain-of-custody kit containing the specimen containers, seals, and documentation required.
Specimen Volume: 1.5 mL
Collection Instructions: Collect a random specimen without preservative in the provided container, seal, and submit with the associated documentation to satisfy the legal requirements for chain-of-custody testing.
Additional Information: Submitting less than 1.5 mL will compromise the ability to perform all necessary testing.
Specimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Refrigerated (preferred) | 14 days |
| Frozen | 14 days | |
| Ambient | 72 hours |
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Clinical Information
Specimen adulteration is the manipulation of a sample that may cause false-negative test results for the presence of drugs of abuse. Common adulterants that may affect testing are water, soap, bleach, vinegar, oxidants, and salt. The adulteration testing includes assessment of creatinine concentration, pH, urine specific gravity, presence or absence of an oxidant, and presence or absence of nitrite.
Chain of custody is a record of the disposition of a specimen to document the individuals who collected the specimen, handled it, and performed the analysis. When a specimen is submitted in this manner, analysis will be performed in such a way that it will withstand regular court scrutiny.
Day(s) Performed
Monday through Saturday
Report Available
2 to 3 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Method Name
Spectrophotometry
Reference Values
Cutoff concentrations
Oxidants: 200 mg/L
Nitrites: 500 mg/L
Testing Algorithm
For more information see Adulterant Survey Algorithm.
Forms
1. Chain of Custody Request is included in the Chain-of-Custody Kit (T282).
2. If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.