Calibration of Pesticides and Mycotoxins on GC/TQ and LC/TQ

Significance of Topic

Ensuring safety of cannabis and hemp requires monitoring of pesticide residues and mycotoxins that pose health risks. Regulatory bodies worldwide demand reliable, multiresidue testing to protect consumers and comply with evolving standards.

Objectives and Study Overview

This application brief demonstrates a unified calibration approach using Agilent California Cannabis Pesticide Kit and Cannabis Mycotoxin Mix across both GC/TQ and LC/TQ platforms. The goal is to streamline workflows and meet state-specific pesticide lists with a single sample preparation.

Methodology and Used Instrumentation

Hemp flower samples were extracted using acetonitrile, homogenized, and cleaned up via C18 SPE, followed by dilution and spiking with isotope-labeled internal standards. Calibration standards ranged from 100 ppt to 10 ppb in matrix. Analysis was performed on an Agilent 8890 GC coupled to a 7010B triple quadrupole and an Agilent 1290 Infinity II LC coupled to a 6470B triple quadrupole mass spectrometer. Specific chromatographic and MS parameters ensured optimal separation and detection.

Main Results and Discussion

Both platforms achieved excellent linearity (R2 > 0.99) for 66 pesticides and 5 mycotoxins in hemp matrix. GC/TQ effectively analyzed volatile and semi-volatile pesticides, while LC/TQ covered polar compounds and mycotoxins. Chromatographic overlays confirmed clear peak resolution and reproducible responses across calibration levels.

Benefits and Practical Applications

The integrated sample preparation and standard kits reduce laboratory workload and cost by eliminating instrument-specific calibrations. This unified workflow supports compliance with regional regulations and enhances throughput in quality control settings.

Future Trends and Opportunities

Expansion of regulated analyte panels will drive the development of broader multiresidue standard kits and automated sample processing. Future integration with high-resolution mass spectrometry and data analytics could further improve sensitivity and specificity in cannabis testing.

Conclusion

The study validates a streamlined calibration workflow using Agilent pesticide and mycotoxin standards on GC/TQ and LC/TQ platforms, offering high linearity, reproducibility, and efficiency for regulated cannabis and hemp analysis.

Reference

• Sanderson J. Application Brief: Calibration of Pesticides and Mycotoxins on GC/TQ and LC/TQ for Cannabis and Hemp Testing. Agilent Technologies, Inc. 2022.