Dear Sir, Illicit drugs have always contained other substances in addition to the claimed
active ingredient, leading to potential health threats or even to premature death. Adulterants …

Several factors may affect the validity and outcome of urine testing for abused drugs such as
amphetamines, barbiturates, benzodiazepines, cannabinoids, cocaine, ethanol, opiates …

Various chemicals can be added to urine specimens collected for drug analysis to
abnormally elevate ionic concentrations and/or interfere with either immunoassay urine drug …

Target analysis using liquid chromatography–tandem mass spectrometry is applied for
rapidly detecting various prohibited doping substances. Frequent modification is required as …

The minimum concentrations of an analyte that can be reliably detected or measured in an
analytical proce-dure are important performance characteristics of the assay. Over the years …

Three cases of multiple false-positive drug tests are described. Postmortem urine specimens
were screened using the enzyme-multiplied immunoassay technique. All patients had …

Screening urine samples for drugs of abuse is important for the confirmation of drug misuse
and for the clinical management of drug misusers. Laboratories providing this service …

The effect of glutaraldehyde (the active component of “UrinAid”) on Syva EMIT II drugs-of-
abuse screening assays was studied. It was found that, dependent on the assay involved …

Urinalysis results are increasingly being used by employers to detect use of prohibited
substances in the workplace. Actions taken on the basis of positive urinalysis results can …

One challenge facing the laboratory forensic toxicologist today is verifying the validity of the
random urine specimen submitted for workplace drugs of abuse analysis. Determining …