Pesticides and Other Environmentally Relevant Substances that can be Analysed by Rapid Large Volume Sampling

Significance of the topic

Monitoring trace levels of pesticides and other environmental contaminants is essential for safeguarding water quality, ensuring regulatory compliance, and protecting ecosystems and public health. Rapid large volume sampling enables efficient enrichment of dilute pollutants from aquatic matrices, supporting accurate and reproducible analysis at very low concentrations.

Objectives and Study Overview

This application note compiles a comprehensive list of environmentally relevant substances that yield reproducible recoveries when analyzed by rapid large volume sampling. The primary goal is to demonstrate the broad applicability of this technique across different chemical classes and to identify any compounds prone to partial degradation during sampling.

Methodology and Instrumentation

The rapid large volume sampling approach involves passing several liters of aqueous sample through a high-capacity sorbent cartridge to concentrate target analytes. After sample loading, analytes are eluted with suitable solvents and subsequently analyzed by chromatographic techniques (e.g., gas chromatography or liquid chromatography) coupled with mass spectrometric detection. This workflow offers high-throughput enrichment, minimal sample preparation artifacts, and compatibility with a wide range of compound polarities.

Main Results and Discussion

The study demonstrates that the majority of tested compounds exhibit recoveries of nearly 100% under optimized large volume sampling conditions. Key findings include:

• Organophosphorus and nitrogen-containing pesticides: Over 40 compounds such as atrazine, malathion, chlorpyrifos methyl, and parathion methyl showed quantitative recoveries.
• Polychlorinated biphenyls (PCBs): All congeners, including highly volatile types, were effectively sampled without loss.
• Polycyclic aromatic hydrocarbons (PAHs): A broad range of PAHs yielded high recoveries, though naphthalene required fine-tuning of sampling parameters due to its volatility.
• OCI pesticides: Organochlorine pesticides like aldrin, DDT isomers, and endosulfan were successfully recovered at trace levels.
• Miscellaneous compounds: Diverse analytes including caffeine, nicotine, and benzothiazole displayed robust performance.
• Compounds with observed degradation: Mevinphos, dimethoate, and azinphosmethyl showed partial breakdown, indicating the need for rapid processing or stabilizing additives.

Benefits and Practical Applications

Rapid large volume sampling provides several advantages:

• High recoveries across a wide chemical space, reducing method development time.
• Ability to detect ultra-trace pollutant concentrations in environmental monitoring, wastewater analysis, and drinking water quality control.
• Scalability for field deployments and automated sampling stations.
• Compatibility with existing chromatographic workflows, enabling seamless integration into laboratory QA/QC protocols.

Future Trends and Potential Applications

Advancements in sorbent materials and cartridge design are expected to expand the range of target analytes and improve sampling speeds. Integration with on-line automated samplers and direct coupling to high-resolution mass spectrometers will facilitate real-time monitoring of water bodies. Additionally, the method may be adapted for emerging contaminants such as pharmaceuticals and personal care products.

Conclusion

This application note confirms that rapid large volume sampling is a versatile, high-throughput approach for concentrating and analyzing a wide array of pesticides and other environmentally relevant substances with reproducible, near-quantitative recoveries. It supports reliable environmental surveillance and regulatory compliance efforts.

References

• GL Sciences B.V. Application Note No. 029. Pesticides and Other Environmentally Relevant Substances that can be Analysed by Rapid Large Volume Sampling.