A lab drug test that is done with test strips provides a qualitative indication of the amount of specific drugs in urine; however, with the kind of lab drug testing that uses test strips and test cards it is not possible to determine the exact amount of drug that is present in any sample, it can only provide with preliminary results. A more specific method of laboratory drug test should be used in order to obtain a quantitative result in compliance with. SAMHSA and other regulatory agencies, most of such confirmatory testing are the gas chromatography / mass spectrometry (GC/MS) methods. These testing methods are widely approved and accepted as a confirmatory method for most drugs.

Though preliminary testing and the comprehensive quantitative testing are a part of any drug testing need, most of the preliminary testing can be done at home or in an office, but the donor or by someone else for the donor. In most cases of preliminary testing, one need not got for laboratory drug testing and spend some money. Rather most of the preliminary strip and card tests can be done from home and if the tests are positive the sample can be produced to the laboratory for further qualitative analysis.

For any sample that is tested positive, it is important to give the sample that was used for the preliminary testing that turned positive for quantitative analysis with labcorp drug screening method. If the sample that is tested positive for the preliminary is different from the sample that is used for the confirmatory analysis there are going to be lot of differences in the results for such testing. The sample that is used for the qualitative analysis should be used for quantitative analysis also. If the sample is going to be different then the laboratory will perform the qualitative analysis over again. Any lab drug testing result is about the sample given at a point in time.

In many cases the samples that were collected after the detection times will show negative. So, you might be surprised that you got a test positive yesterday, but a test negative 2 days later. It is for this reason that for any quantitative of qualitative analysis on a sample, the test sample must be the same. It should not be two different samples.

Most of the lab drug test kits that are available for qualitative analysis provide results in 3 to 8 minutes. They are very easy to read from the distinct color bands that they form to indicate the reaction to the reagent in the strip. Before you make any preliminary lab testing from your home you need to verify the expiry date and the package condition of the pouch to ensure a quality testing kit. Damages pouches in which the kits are packed in can cause wrong results.

For any kind of help regarding choosing lab drug test feel free to contact the help desk of drugteststrips.com at info@drugteststrips.com or at toll free: 1 (866) 937-8483 and the consultations are absolutely free.