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PolyRP bulk media are highly crosslinked spherical resins made of styrene and divinylbenzene. These highly rigid resins are narrowly dispersed particles with particle size selection of 10, 15, and 30 μm and pore size selection of 100, 300, 500 and 1000 Å. These resins have abundant phenyl surface functional groups that enable hydrophobic interaction which is useful in reversed phase separation.

PolyRP bulk media are highly stable over a variety of operational conditions. They are stable to resist high temperatures up to 200°C (operating temperature up to 80°C). They are compatible with many commonly used organic solvents and aqueous buffers. PolyRP bulk media have a long life time. With a well-controlled polymer resin manufacturing process, PolyRP bulk media are very reproducible from batch to batch. Compared to silica based reversed phases, PolyRP bulk media are more stable at extreme pH (1-14) with a similar separation efficiency and unique selectivity.

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