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Drugs of Abuse in Hair (DAH)

  • Currently not included in our UKAS scope of accreditation
  • The LGC Drugs of Abuse in Hair (DAH) scheme is suitable for laboratories performing forensic analysis of hair for drugs of abuse and provides an independent assessment of measurement quality.
  • Drugs and their metabolites become incorporated in hair when ingested. An analysis for these drug residues can provide a useful assessment of an individual’s intake of drugs over a prolonged period of time.
  • The detection time of drugs in hair is significantly greater than other samples commonly tested such as blood, urine and saliva.
  • Advantages of analysing hair samples for the presence of drugs include a large window of detection, the assessment of the regularity of drug use (or continued abstinance) and sample stability.
  • The analytes are then incorporated by a method that includes soaking. Drugs (and/or metabolites) from six major classes are included during the scheme year
  • The operation of our DAH scheme is supported by an Advisory Group consisting of members of the professional bodies, scheme participants, and others experienced in the field.
  • Scheme operates from April to March


Round dates


Despatch date

Reporting deadline

DH02418 Mar 201915 Apr 2019
DH02507 May 201903 Jun 2019
DH02609 Sep 201907 Oct 2019
DH02702 Dec 201906 Jan 2020
DH02816 Mar 202014 Apr 2020



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