A Fast and Comprehensive Potency Determination of 21 Cannabinoids in Hemp Plant Material and Finished Tinctures using the Cannabis Analyzer for Potency

Significance of the Topic

Cannabis and hemp products are rapidly expanding in pharmaceutical, nutraceutical and quality-control laboratories. Accurate determination of cannabinoid content is essential for product consistency, regulatory compliance and therapeutic dosing. A fast and comprehensive potency assay supports both research and industrial workflows by reducing analysis time while maintaining high reliability.

Aims and Overview of the Study

This work presents a validated high-performance liquid chromatography (HPLC) method for simultaneous quantitation of 21 cannabinoids in dry hemp flower and finished tincture oils. The primary objectives were to develop a rapid, high-resolution separation in under 15 minutes, establish robust calibration and quality-control metrics, and demonstrate the method’s applicability to commercial samples.

Used Instrumentation

• Shimadzu Cannabis Analyzer for Potency™ integrated HPLC system
• Built-in UV-Vis detector at 220 nm
• NexLeaf CBX column (150 mm × 4.6 mm, 2.7 μm) with guard cartridge
• Mobile phases: 0.085 % phosphoric acid in water and in acetonitrile
• Gradient elution: 70–95 % B over 11 min, total run including wash 15 min

Methodology

Sample preparation differed for dry flower (100× dilution) and tincture oil (1 000× dilution) involving homogenization, solvent extraction, and 0.45 µm filtration. Calibration employed six concentration levels (0.5–85 mg/L) and three QC standards (2.5, 30, 70 mg/L) with seven replicate injections. A 1/C weighting linear regression model was applied for quantitation.

Main Results and Discussion

All 21 cannabinoids achieved baseline separation within 15 minutes. Calibration curves exhibited correlation coefficients R2 ≥ 0.999. QC results demonstrated repeatability (RSD ≤ 2.7 %) and accuracy within ±5 % across the range. Analysis of dry hemp confirmed >75 % CBD by weight with no detectable Δ9-THC. Two commercial tinctures yielded total CBD and THC contents consistent with label claims, illustrating method reliability for both sample types.

Benefits and Practical Applications

This method offers:

• Rapid throughput for high-volume testing laboratories
• Comprehensive cannabinoid profiling in a single run
• High sensitivity and accuracy across a broad concentration range
• Flexibility to process both plant material and finished oil formulations

Future Trends and Opportunities

• Integration of mass spectrometry detectors to enhance selectivity and trace-level detection
• Miniaturized and automated sample preparation for increased lab efficiency
• Adaptation to emerging cannabinoids and by-products as new standards become available
• Real-time in-process monitoring in manufacturing settings

Conclusion

The developed HPLC method on the Shimadzu Cannabis Analyzer for Potency™ delivers a fast, reliable and fully validated assay for quantifying 21 cannabinoids in hemp matrices. Its robustness, combined with high resolution and throughput, makes it well suited for research, quality control and regulatory compliance in the expanding cannabis industry.