CHROMATOGRAPHY
RESPREP PFAS CARTRIDGES
How dual-bed cartridges with filter aid help streamline solid-phase extraction during sample preparation
E
ffective sample preparation is essential for accurate trace-level PFAS analysis in complex sample matrices,
such as non-potable waters, solids, biosolids, and tissues. Solid phase extraction (SPE) is typically used, but good results are difficult to achieve if background PFAS are present or if sample components clog the SPE cartridges. EPA Method 1633, which has been validated in multiple laboratories, uses a wool- packed weak anion exchange (WAX) cartridge for matrix extraction, followed by a dispersive graphitised carbon black (dGCB) cleanup step, with many labs adopting a carbon cartridge instead of using dGCB. While effective, this two-cartridge approach with manually-packed wool adds extra time, complexity, and risk
PFAS
SPE sample preparation can be streamlined significantly with dual-bed Resprep PFAS cartridges
A dual-bed Resprep PFAS cartridge with filter aid
of introducing contaminants to the sample preparation process.
RESPREP PFAS CARTRIDGES ARE A SIMPLER SOLUTION PFAS SPE sample preparation can be streamlined significantly with dual-bed Resprep PFAS cartridges, which combine SPE extraction and carbon cleanup into a single cartridge. In this fast, simple workflow, the ultra-clean WAX and CarboPrep Plus sorbents used in
Figure 2: Only Resprep PFAS cartridges with a factory-packed filter aid successfully extracted all 500 mL of 2.5x diluted ASTM wastewater matrix (total suspended solids = 100 mg/L)
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