Analysis of Drugs of Abuse in Human Hair

A new technical report released via the NIJ details research that aimed resolve whether false-positive test results caused by environmental contamination are a significant concern in the analysis of hair for the purpose of identifying drug use.

The abstract of Analysis of Drugs of Abuse in Human Hair: Surface Contamination and Localization of Analysis, written by Megan Grabenauer, Nichole D. Bynum, and Katherine N. Moore, explains:

For more than two decades, researchers and scientists have utilized hair testing for drug abuse in addition to blood and urine tests.

Despite considerable research and current analytical technologies and interpretive methods, environmental contamination remains an unresolved issue for hair, and controversy exists over the source of drug residues found in hair and the potential for environmental contamination to cause false-positive test results.

The purpose of this study was to examine the effects of environmental contamination of human hair leading to external deposition of methamphetamine and heroin on drug tests designed to identify drug use.

The goals of this project were to determine:

1) The likelihood of whether methamphetamine and heroin can be adequately removed by an extended aqueous phosphate buffer decontamination procedure;

2) If, over time and with normal hygienic treatment of the hair, the drug will be removed from the hair or prove resistant to removal;

3) The extent to which normal hygienic treatment and the extended aqueous phosphate buffer decontamination procedure affect measurable levels of methamphetamine and heroin in hair from drug users who have ingested those compounds;

4) Whether several imaging techniques could be used to localize the site of incorporation of the drugs into hair as an indicator of the route of incorporation.

Prior studies have raised significant concerns about the potential for contamination to confound hair testing results, which could have direct consequences, either supporting or refuting claims of contamination being the source of positive hair results. The results from this study continue to raise such concerns.

Many hair testing laboratories have decontamination procedures prior to analysis in an attempt to remove and contribution from external contamination. This study shows that a decontamination step alone is likely not sufficient to remove contributions from external contamination.

You can download a full copy of the report here.

 
< Prev   Next >






Product News

Six interchangeable LED lamps

highlight the features of the OPTIMAX Multi-Lite Forensic Inspection Kit from Spectronics Corporation. This portable kit is designed for crime-scene investigation, gathering evidence, and work in the forensic laboratory. The LEDs provide six single-wavelength light sources, each useful for specific applications, from bodily fluids to fingerprints. The wavelengths are: UV-A (365 nm), blue (450 nm), green (525 nm), amber (590 nm), red (630 nm), and white light (400-700 nm). The cordless flashlight weighs only 15 oz. To learn more, go to: www.spectroline.com

Read more...