Cannabis and Hemp Testing

Importance of the Topic

Cannabis and hemp products require rigorous analytical testing to ensure safety, quality and regulatory compliance. With increasing legalization and evolving regulations, laboratories face growing pressure to deliver reliable data on potency, pesticide residues, and mycotoxins to protect consumers and uphold industry standards.

Objectives and Study Overview

This application note outlines a comprehensive workflow for regulated cannabis testing. It aims to demonstrate rapid cannabinoid profiling, sensitive pesticide monitoring, and accurate mycotoxin detection using a suite of Waters instruments and consumables, enabling labs to adapt quickly to new requirements.

Methodology and Instrumentation

• Sample Preparation: Solid-phase extraction and dispersive SPE simplify cleanup for both pesticides and cannabinoids.
• Chromatographic Techniques: HPLC and UPLC methods achieve fast separation of 16 cannabinoids under 10 minutes; UPC2 offers enhanced isomer resolution.
• Mass Spectrometry: LC-MS/MS and GC-MS/MS platforms deliver targeted quantitation of pesticide residues and mycotoxins with high sensitivity.
• Rapid Screening: VICAM one-step aflatoxin strip tests combined with fluorometers enable three-minute detection at low ppb levels.
• Data Management: A unified software environment streamlines method development, analysis, and reporting across LC-MS/MS and GC-MS/MS systems.

Main Results and Discussion

• Potency Measurement: UPLC separation of 16 cannabinoids, including CBD, Δ9-THC, THC-A, and minor isomers, achieved baseline resolution in under 10 minutes with detection at 228 nm.
• Pesticide Monitoring: Representative MRM chromatograms confirmed detection of key pesticides (mevinphos, dimethomorph, fenhexamid, coumaphos, spinetoram, chlorpyrifos) at 0.10 µg/g, meeting Oregon, California, and Canada action limits.
• Mycotoxin Detection: Aflatoxins B1, B2, G1, G2, and ochratoxin A were quantified at 20 ng/g in cannabis matrices using LC-MS/MS, with VICAM strip tests providing rapid preliminary screening.

Benefits and Practical Applications

• High Throughput: Fast run times and simplified workflows increase sample capacity and reduce turnaround.
• Regulatory Compliance: Methods validated against major jurisdictional limits support market access.
• Operational Efficiency: Single software platform and turnkey consumables minimize training needs.
• Data Integrity: Robust instrumentation ensures reproducible, accurate quantitation of both major and trace analytes.

Future Trends and Opportunities

Emerging priorities include integrating automated sample prep into high-throughput pipelines, expanding use of supercritical fluid chromatography (UPC2) for complex isomer separations, and deploying high-resolution MS for non-targeted screening. Portable and real-time monitoring solutions are expected to gain traction for on-site testing, while advanced informatics will support predictive quality control.

Conclusion

Waters’ end-to-end solutions for cannabis and hemp testing combine rapid, sensitive methods with flexible instrumentation and software. These workflows empower labs to meet current and future regulatory requirements, enhance data confidence, and scale operations effectively.