Drugs of abuse in oral fluid scheme (DOF)

• UKAS accredited proficiency testing scheme
• External Quality Assessment (EQA) designed for laboratories and on-site screening clinics that provide routine services for detection of drugs in oral fluid
• Participants receive sets of three test materials at quarterly intervals with 4 weeks being allowed for drug analysis
• Test materials consist of 1.7ml oral fluid obtained from volunteers and known drug users
• Mixtures of drugs with their metabolites from 6 major classes:-
• - Amfetamines & stimulants
  - Cannabinoids
  - Cocaine & metabolites
  - Minor tranquillizers
  - Non-opiate narcotics
  - Opiates
• Participants select to make their reports relative to one of two sets of threshold drug concentrations
• Thresholds are recommended by the European Workplace Drug Testing Society
• Scheme operates from September to March

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