Urinary pentyluracil mass concentration (24-hour collection)
This test measures the amount of pentyluracil, a metabolite of certain drugs or chemicals, in your urine over a 24-hour period. It may be used to monitor exposure or metabolism in specific clinical scenarios.
["This test helps track levels of a drug or chemical metabolite in your urine over a full day."]
Key facts at a glance
- LOINC
- 78841-4
- Short code
- JWH-122 5OH-pentyl Ur Cfm-mCnc
- Synonyms
- JWH-122 5OH-pentyl Ur Cfm-mCnc
- Category
- chemistry
- Sample
- urine
- Container
- Sterile urine container
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- confirm
- Specimen volume
- 10 mL
- Stability
- Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
Why This Test Might Be Ordered
Your healthcare provider may recommend this test if they suspect you’ve been exposed to certain substances (like drugs, toxins, or environmental chemicals) or if you’re undergoing treatment requiring monitoring of metabolite levels. It could also be part of a broader evaluation for metabolic or toxicological conditions.
What to Expect Before the Test
You’ll need to collect all urine produced in a 24-hour period (typically from one morning to the next morning) in a special container. Follow your provider’s instructions carefully to ensure accurate results. Avoid certain foods, medications, or activities that might interfere with the test.
How the Test Works
The collected urine sample is analyzed using a specialized laboratory technique (likely high-performance liquid chromatography or a similar method) to measure the mass concentration of pentyluracil. This helps determine how much of the substance was present in your body over the monitored period.
What the Results Mean
Results may indicate normal exposure levels, potential drug/toxin metabolism patterns, or abnormal accumulation that could signal underlying health concerns. Your provider will interpret the results in the context of your medical history and symptoms.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance: Interpretation and Use
Short name
24-Hour Urine Pentyluracil
Frequently asked questions
What does a high or low result mean?
How often is this test repeated?
Can I drink water during the test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy