Forensic Drug Testing Lab
Urine Drug Testing
Urine provides the middle ground in drug testing, showing a history of drug exposure shorter than hair, but longer than oral fluid. A sample of 10 ml provides information on the last 2-3 days of drug history for most drugs. We confirm all presumptive positive results by LC-MS/MS or GC-MS, and offer customized urine testing panels with over 50 drug and alcohol biomarkers, including propofol glucuronide (e.g. Diprivan®) and designer stimulants (i.e. Bath Salts).
Click here to download the urine drug panels.
Click here to view the Urine Resources page.
- 17 Panel
- 16 Panel
- 15 Panel
- 14 Panel
- 12 Panel
- 10 Panel
*Click the green and white plus sign beside each drug class to view the substances within each class.
collection/transport cup. Seal the collection/transport cup with the security seal and allow the donor to initial the seal.
By Phone: 1.800.235.2367
Business Hours (CST)
Monday 6am - 8pm
Tuesday 6am - 8pm
Wednesday 6am - 8pm
Thursday 6am - 8pm
Friday 6am - 8pm
Panel Name: Urine Testing
Panel Description: Urine Testing Drug Panel
Collection Container: Leakproof Polypropylene
Sample Amount: 10 ml
Storage Conditions: Refrigerated
Transport Conditions: Ambient
Method: Initial screening test with confirmation of presumptive positives
Turn-Around Time: 1 day for negatives / 2-3 days for positives
- White Papers
How do PEth results differ from Urine EtG/EtS results?
How much is needed for an adequate urine sample?
Q: Why are both ethyl sulfate (EtS) and ethyl glucuronide (EtG) included in urine testing for alcohol use, but only EtG in fingernail or hair testing?
A: For urine testing, it is standard practice in the field of toxicology to include both EtS and EtG, because EtG is subject to bacterial production and degradation if a urine sample is contaminated (e.g. when the donor has a urinary tract infection). EtS is not subject to bacterial production or degradation, and provides a second, more reliable alcohol biomarker in these urine contamination scenarios. Other specimens types, such as fingernails and hair, do not have this issue, so only EtG is measured in those sample types.
What is the detection window for urine?
Why was one matrix positive and another negative on the same donor?
There are several explanations for this.
- Different sample matrices have different detection time frames. The result of any second collected specimen has no bearing on the validity of a first collected specimen. For example, a hair sample with a three month window of detection might test positive for a particular substance, while a urine sample from the same donor, with a 2-3 day window of detection, might test negative. In this case, the donor has used that substance within the past three months, but may not have used it within the most recent three days.
- The result of any second collected specimen has no bearing on the validity of a first collected specimen. Therefore, a negative result observed for the umbilical cord does not refute a positive result observed on the maternal urine specimen and the reverse is true as well. There are many legitimate reasons for discrepant urine and umbilical cord results.
- The urine specimen was a screen only result and was not confirmed using an appropriate mass spectrometric method. The screen only urine result is a clinically valid result, however, without an appropriate mass spectrometric confirmation, the urine result has no value in a forensic proceeding.
- Lastly, some placentas can prevent some compounds from reaching the fetus. There are documented cases of maternal ingestion without in utero exposure.
Will a UTI affect the result of drug and/or alcohol testing?