What is a high THC level in urine?
The presence of THC-COOH in urine greater than 100.0 ng/mL indicates relatively recent use, probably within the past 7 days. Levels greater than 500.0 ng/mL suggest chronic and recent use.
What is the THC cutoff for Quest Diagnostics?
Lab-based urine drug test common cutoff levels
| Drug | Screen cutoff | Confirmation cutoff |
|---|---|---|
| Amphetamines | 500 ng/mL | 250 ng/mL |
| Cocaine metabolites | 150 ng/mL | 100 ng/mL |
| Marijuana metabolites | 50 ng/mL | 15 ng/mL |
| MDA-analogues | 500 ng/mL | 250 ng/mL |
How much urine does Quest Diagnostics require?
A: Urine drug testing requires a minimum of 30 mL of urine (45 mL for a U.S. Department of Transportation collection) collected in the privacy of a restroom. The collector pours the specimen into a bottle that is sealed with tamper-evident tape.
What is the confirmatory test for drugs?
Confirmatory Test refers to the analytical procedure to identify and quantify the presence of a specific drug or metabolite, which is independent of the initial test and which uses a different technique and chemical principle from that of the screening test in order to ensure reliability and accuracy.
What is the difference between home drug test and lab drug test?
Lab-based drug tests are more accurate. We like to say they are more rigorous, more involved, and more defensible in a court of law, all of which are elements certain organizations must consider, particularly heavily regulated industries, like the DOT.
How sensitive are home drug tests?
Many First Check® Home Drug testing products are more than 99 percent accurate in detecting specific drugs according to the designated cut-off levels. However, if a more sensitive test is administered, there is a chance of testing positive if drugs are present in urine.
How many oz of pee is needed for a drug test?
One to two ounces of urine is collected in a clean container. A sufficient sample is required for accurate results. Urine for a urinalysis can be collected at any time. In some cases, a first morning sample may be requested because it is more concentrated and more likely to detect abnormalities.
Where can I find cut off levels for drug testing?
Drug Testing Cut Off levels for the standard 5 panel drug urine test, DOT drug test and other drug test panel configurations can be found at: Charts – Cutoff Levels
Does THC show up on a drug test?
Most laboratory drug screens test THC at the 50 ng/mL level, so in this example, you would pass the test. The best thing to do is not to over-worry about a faint line. For a positive result, the line should appear next to the “C” and not the “T”.
Is there a free THC drug test calculator?
Free THC Drug Test Calculator. Will You Pass a Drug Test? Welcome to the Green Fleets THC drug test calculator. The calculator uses information and statistical data from the latest medical, scientific researches and studies to emulate the processes of marijuana metabolism in the body.
What is a faint line on a THC test?
For example, if you use our THC 15 ng/mL test and your results show a faint line, this means your levels are below 15 ng/mL, which is considered very low. Most laboratory drug screens test THC at the 50 ng/mL level, so in this example, you would pass the test.