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New Polymeric SPE Offers an Alternative to Silica-Based Sorbents


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Restek has expanded its line of Resprep solid phase extraction (SPE) products with the addition of polymeric sorbents, available in both cartridges for high loading capacity and 96-well plates for high throughput and automation.

Resprep polymeric SPE products feature a silica-free, bonded polymeric material, designed to prevent unwanted secondary silica interactions, even with basic compounds. High surface area means a higher loading capacity compared to silica sorbents, and stability over a wide pH range (0–14) aims to ensure they won’t hydrolyze under extreme conditions. New Resprep polymeric SPE cartridges and 96-well plates are water-wettable, allowing for streamlined conditioning and equilibration steps to reduce solvent usage and sample prep time. They are also not flow-rate dependent, such that they maintain retention and capacity after conditioning, even if dried out from vacuum or positive pressure flows.

Resprep polymeric SPE products offer five distinct packings to choose from.


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