New bioanalytical method reveals stability secrets for cannabis research

Researchers developed and validated a sophisticated laboratory method to accurately measure seven different cannabinoids in human blood from just 0.2 milliliters of plasma. This work is crucial because understanding how the body processes cannabis compounds like THC (tetrahydrocannabinol) and CBD (cannabidiol) requires precise measurement tools. The team optimized extraction techniques and mass spectrometry methods to achieve sensitivity levels as low as 0.5 ng/mL, allowing researchers to detect even tiny amounts of cannabinoids and their metabolites—the compounds created when the body breaks down cannabis.

The study revealed important stability information about storing cannabinoid samples for research. Solution samples remained stable for only about 6 months when stored at freezing temperatures in polypropylene containers, but plasma samples showed remarkable stability of approximately 3 years (-80°C storage), providing valuable guidance for biobanks and long-term research projects. The validated assay successfully processed approximately 1,650 patient samples without a single batch failure, demonstrating its reliability and robustness for real-world research applications.

This advancement directly supports the expanding body of cannabis pharmacokinetics research—essentially mapping how the body absorbs, distributes, and eliminates cannabis compounds. As cannabis legalization spreads and consumption increases, having accurate, validated bioanalytical methods becomes essential for understanding individual differences in cannabinoid metabolism, optimizing therapeutic dosing, and conducting rigorous clinical trials. This foundational tool enables researchers to generate novel data on how different people process cannabis constituents and their metabolites.