News|Articles|April 23, 2025

Improve Productivity for Pesticides Analysis with More Effective SPE

New Resprep FL + CarboPrep Plus SPE cartridges enhance Florisil cleanup, boosting sample throughput for pesticides >10x. The dual-bed cartridge—containing both Florisil and carbon layers—drastically reduces instrument downtime by eliminating contaminants that degrade DDT and cause inlet performance requirements to fail. Cleaner extracts mean less instrument downtime, more accurate data, and increased lab productivity. Seamlessly integrating into existing workflows, Resprep FL + CarboPrep Plus SPE cartridges use the same solvents, volumes, and steps as Florisil cleanup procedures, making it simple to switch to an SPE that significantly improves lab productivity.

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Figure 2. Split injection used to measure triplicate test of MTBE, hexane, o-xylene, and 1-methylnaphthalene comparing different solvents (methanol, methylene chloride) and column insertion distances starting with 0.5 mm, 5.0 mm, 10.0 mm, 15 mm, and 20.0 mm. Methanol had the best performance at the 5.0 mm insertion distance and methylene chloride looked slightly better at the 0.5 mm. We would still recommend not going below the 5.0 mm manufacturer recommended insertion distance.
Revisiting insertion distance for methanol and methylene chloride in GC analysis and confirming that insertion depth strongly affects response and reproducibility.
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