1 week for quest diagnostic drug test1/31/2024 Keep this in mind: these tests are highly structured, federally regulated, sophisticated procedures conducted in a certified laboratory. If the Chain of Custody is intact, and the initial positive results were confirmed by GC/MS procedure, there is virtually no room for error. Under no circumstances should an applicant or employee be allowed to have a new specimen collected when they dispute a drug test result. Adulterant testing, developed to identify the use of nitrites and other adulterants as a means to disguise drugs in the collected sample.Īn applicant tests positive for drugs and claims there must be a mistake.Integrity testing, to determine creatinine & specific gravity levels, which detect attempts to dilute the specimen.Temperature strips, which assure the sample temperature falls within the acceptable range at the time of collection.Chain of Custody procedures and specific protocols that track the specimen from the moment of collection through the processing and storage procedure.Some of the procedures that have been instituted to determine intentional attempts at “beating” a drug screen are: The science of drug testing has progressed significantly in recent years. Yes, but the odds are long and getting longer all the time. The claim of passive inhalation triggering a positive test result is easily rejected. In addition, the GC/MS confirmation cutoff levels allow for these circumstances. However, studies have shown that the exposure would have had to be so constant and prolonged, and in such a confined space, as to represent an absurd scenario. Some employees have claimed that passive inhalation of marijuana smoke caused their positive test results. are easily distinguishable in the laboratory.are not detected at sufficient levels or.Most of the popular stories about what triggers a ‘false positive’ – such as what you eat or drink, what cosmetics you use, or what over-the-counter medicines you take – are based on misconceptions. With the use of this two-step process and professional, accredited laboratories to eliminate human error in the process, there should be no concern regarding the accuracy of drug tests. The accuracy of the GC/MS confirmatory test is virtually 100% from a scientific standpoint. The accuracy of the initial drug screen, the immunoassay test, ranges between 92% – 98%. Only if both portions of the divided specimen show up positive is it considered a positive result by the testing lab. The second – or confirmation – test uses gas chromatography/mass spectrometry (GC/MS). If the results of that test are positive, then a second test on a portion of the remaining specimen is conducted using a different chemical process. Most laboratories use a two-step process in which each urine sample is divided and a portion is tested using a relatively simple, inexpensive, and accurate test (using enzyme immunoassay technology).
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