Influence of thermal hair straightening on cannabis and cocaine content in hair

Forensic Science International : Synergy
Jana Ettlinger, M Yegles

Abstract

It has been shown that cosmetic treatment like bleaching and perming may lead to an important decrease of drugs of abuse content in hair. Currently, hair straightening has become a regular hair treatment especially for women. The aim of this preliminary study was to investigate the effect of in vitro treatment of hair with heat straightener on cannabis and cocaine concentrations in hair. 17 positive cannabis and 7 positive cocaine hair samples were treated in vitro with a hair straightener. During this treatment hair was put sequentially 30 times in contact with heated iron plates at 200°C during 2s corresponding to a total time of contact of 1min. THC and Cannabinol (CBN) were analysed in cannabis positive hair and cocaine, benzoylecgonin (BZE) and cocaethylene were analysed in cocaine positive hair. Analyses were performed with routine methods using GC/MS in electron impact mode. Regarding cannabis results a decrease of THC concentrations was found in 11 of 17 hair samples after thermal treatment, whereas in 6 cases an increase was shown. In all the hair samples CBN concentrations was explicitly higher after the in vitro treatment. Regarding cocaine results cocaine and cocaethylene concentrations decreased after treatment in ...Continue Reading

References

Sep 1, 1995·Journal of Analytical Toxicology·V CirimeleP Mangin
Jan 1, 1997·International Journal of Legal Medicine·C JuradoM Repetto
Feb 26, 2000·Forensic Science International : Synergy·M YeglesR Wennig
May 13, 2014·Drug Testing and Analysis·Jana EttlingerMichel Yegles

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Citations

Jan 10, 2018·Drug Testing and Analysis·Delphine CappelleAlexander L N van Nuijs
Sep 25, 2017·Clinical Toxicology : the Official Journal of the American Academy of Clinical Toxicology and European Association of Poisons Centres and Clinical Toxicologists·Eva Cuypers, Robert J Flanagan
Jun 5, 2017·Cell Stress & Chaperones·Mouna MaatoukLeila Chekir Ghedira
Jan 2, 2021·Forensic Science International : Synergy·Wing-Sum ChanBobbie Kwok-Keung Cheung

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