Determination of drugs of abuse in hair: evaluation of external heroin contamination and risk of false positives.

@article{Romano2003DeterminationOD,
  title={Determination of drugs of abuse in hair: evaluation of external heroin contamination and risk of false positives.},
  author={Guido Romano and Nunziata Barbera and Giorgio Spadaro and Vincenzo Valenti},
  journal={Forensic science international},
  year={2003},
  volume={131 2-3},
  pages={98-102}
}
One of the most controversial point regarding the validity of hair testing is the risk of false positive due to external contamination. The aim of our experience is to verify if a 5 consecutive days contamination with a small amount of a powdered mixture of heroin hydrochloride and acetylcodeine hydrochloride (10:1 w/w) will last sufficiently long to make a contaminated subject indistinguishable from active users, and if normal washing practices together with the decontamination procedure are… CONTINUE READING

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