Services

Laboratory analysis of drug tests

Confirmatory analysis, verification and quantification of drug tests via accredited Swedish laboratories. GC-MS and LC-MS/MS as standard – these are the results that hold up legally in work environment cases and disputes.

  • Results in 1–2 days

    Fast handling from sample arrival to digital report.

  • ISO 15189 accredited

    Swedish accreditation – holds up in the Labour Court.

  • GC-MS / LC-MS/MS

    Mass spectrometry as standard for confirmation.

  • MRO review included

    Positive results are reviewed before reporting.

How the laboratory analysis works

  1. The sample arrives

    The sealed sample is received at an accredited laboratory. The integrity of the seal is checked and documented on receipt.

  2. Initial screening

    Screening is based on antibody binding. Negative results are reported directly; positive results proceed to confirmation.

  3. Confirmatory analysis (GC-MS / LC-MS/MS)

    Mass spectrometry identifies the substance specifically and quantitatively. Immune to cross-reactions that cause false positive results.

  4. MRO review

    An MRO physician reviews the result and contacts the tested person to investigate legitimate medical explanations.

  5. Reporting

    The final result is delivered digitally in Provsvaret's encrypted portal to the authorised HR recipient.

We explain what the confirmatory method itself involves in What is LC-MS/MS in drug testing?

Which analyses are included

  • Drug panels

    5-, 10- and extended panels. Includes amphetamine, cocaine, opiates, benzodiazepines, THC, buprenorphine, methadone, MDMA, oxycodone, tramadol and NPS in the extended panel.

  • Alcohol markers

    PEth (phosphatidylethanol), CDT (carbohydrate-deficient transferrin) and EtG (ethyl glucuronide) in blood, urine or hair. Consumption patterns over 2–4 weeks.

  • Quantification

    Exact concentration measurement for medical investigations and legal disputes. Quantitative analysis with a blood test gives the highest precision.

  • Verification of rapid tests

    Confirmatory analysis of positive rapid tests from the workplace. Read more about the entire chain of custody.

Quality and regulatory compliance

  • ISO 15189-accredited laboratories
  • GC-MS and LC-MS/MS for confirmation
  • Standardised cut-off values in line with the Swedish Board for Accreditation and Conformity Assessment (SWEDAC)
  • Legally robust chain of custody from arrival to result
  • MRO review of all positive results

When laboratory verification is required

  • After a confirmed positive rapid test, before any action is taken
  • For for-cause testing after an incident
  • In medical investigations and legal disputes
  • For follow-up during rehabilitation
  • When exact concentration measurement is needed

Frequently asked questions about laboratory analysis

Screening is an initial analysis based on antibody binding – fast and inexpensive, but it can give false positive results due to cross-reactions. Confirmatory analysis with GC-MS or LC-MS/MS identifies the substance specifically and quantitatively – immune to cross-reactions and legally robust.

Do you need laboratory verification?

Book 30 minutes with us and we will go through panel design, turnaround times and how to integrate laboratory verification into your existing process.

Laboratory analysis of drug tests | Provsvaret