THC and THC-COOH detection from DBS by LC-MS/MS. Cannabis use assessment from a finger-prick sample.
2 analytes
3–5 working days
This method detects THC and its primary metabolite THC-COOH in dried blood spots, enabling assessment of recent cannabis use or exposure.
Clinical indications include:
THC (Δ9-tetrahydrocannabinol) and THC-COOH (11-nor-9-carboxy-THC, primary inactive metabolite).
Both analytes are measured by isotope-dilution LC-MS/MS from DBS, providing specific and sensitive detection of cannabis use without cross-reactivity with other cannabinoids or interfering substances.
From enquiry to results in a few simple steps — no clinic visit required.
This test is available to healthcare professionals, wellness brands, clinics, and research institutions worldwide. We currently serve partners in:
Whether you need testing services for your patients, white-label kits for your brand, or method transfer to your own laboratory — get in touch to discuss how we can work together.
Detects THC (delta-9-tetrahydrocannabinol) and its primary metabolite THC-COOH from a finger-prick blood spot by LC-MS/MS.
Blood-based THC detection reflects more recent exposure than urine testing. LC-MS/MS provides confirmation-grade specificity, unlike immunoassay screens which can produce false positives.
Finger-prick DBS card, at home or in clinic.
Results are typically delivered within 3 to 5 working days from the time your sample arrives at our laboratory.
THC is typically detectable in blood for 1–2 days after occasional use. THC-COOH, being a metabolite, can be detectable somewhat longer. Detection windows depend on frequency of use, body composition, and dose.
Masdiag's THC test is available worldwide through our partner network. We currently serve healthcare professionals, wellness brands, and clinics in Europe, the United Kingdom, Asia, Australia, New Zealand, and the United States. Contact us to discuss testing services, white-label kits, or method transfer to your laboratory.
Whether you need testing services, method transfer, or white-label kit development — we'd love to hear from you.