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HelpTest ID VLTUX Volatile Screen, Chain of Custody, Urine
Useful For
Detecting the presence of acetone, methanol, isopropanol, or ethanol in urine with subsequent quantitation
Chain of custody is required whenever the results of testing could be used in a court of law. Its purpose is to protect the rights of the individual contributing the specimen by demonstrating that it was under the control of personnel involved with testing the specimen at all times; this control implies that the opportunity for specimen tampering would be limited.
Additional Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| COCH | Chain of Custody Processing | No | Yes |
Testing Algorithm
Volatile screen includes methanol, ethanol, isopropanol, and acetone.
Method Name
Headspace Gas Chromatography-Flame Ionization Detector (HSGC-FID)
Reporting Name
Volatile Screen, CoC, USpecimen Type
UrineContainer/Tube: Chain-of-Custody Kit (T282) containing the specimen containers, seals, and documentation required.
Specimen Volume: 20 mL
Collection Instructions: Collect specimen in the container provided, seal, and submit with the associated documentation to satisfy the legal requirements for chain of custody testing.
Additional Information:
1. If urine creatinine is required or adulteration of the sample is suspected, the following test should be requested, ADLTX / Adulterants Survey, Chain of Custody, Urine. For additional information, please refer to ADLTX / Adulterants Survey, Chain of Custody, Urine.
2. Submitting less than 20 mL will compromise our ability to perform all necessary testing.
Forms: Chain-of-Custody Request Form is included in the Chain-of-Custody Kit (T282). A copy of this form is also available at http://www.mayomedicallaboratories.com/it-mmfiles/chain-of-custody-request-form.pdf.
Specimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Refrigerated (preferred) | 72 hours |
| Frozen | 14 days | |
| Ambient | 24 hours |
Clinical Information
Urine provides a medium for easy screening.
Chain of custody is a record of the disposition of a specimen to document who collected it, who handled it, and who 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.
Reference Values
METHANOL
Not detected (Positive results are quantitated.)
Cutoff concentration: 10 mg/dL
Toxic concentration: ≥10 mg/dL
ETHANOL
Not detected (Positive results are quantitated.)
Cutoff concentration: 10 mg/dL
ISOPROPANOL
Not detected (Positive results are quantitated.)
Cutoff concentration: 10 mg/dL
Toxic concentration: ≥10 mg/dL
ACETONE
Not detected (Positive results are quantitated.)
Cutoff concentration: 10 mg/dL
Toxic concentration: ≥10 mg/dL
Cautions
Quantitation of acetone, methanol, isopropanol, or ethanol in urine correlates poorly with degree of intoxication.
For best clinical correlation, VLTBX / Volatile Screen, Chain of Custody, Blood is suggested.
Day(s) Performed
Monday through Sunday; Varies
Report Available
Same day/1 dayPerforming Laboratory
Mayo Medical Laboratories in Rochester
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.CPT Code Information
80320
G0480 (if appropriate)