Frequently Asked Questions

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Q: What is different with your Polymeric Stationary Phases?
A: Polymeric stationary phases are offered with different degree of cross-linking.
STYROS™ products are optimally cross-linked to provide "Hard Gel" that equals the pressure tolerance of Silica without the rigidity and brittleness of Silica.

Q: How high of back pressure can it stand?
A: We have tested it up to 10,000 psi without collapsing the bed.

 Q: Are you suggesting that there is no leaching?
A: Indeed, the column can last many years as the bed remains intact.
Provided that the column is properly used and cleaned after usage in order to avoid the fouling of the bed or the plugging of the frit, the media will not degrade. There is no leaching.

 Q: Polystyrene divinyl benzene polymers are hydrophobic, how do you make it hydrophilic? Is there any "shrink-wrapping" involved?
A: No "shrink-wrapping" as the stationary phase is fully porous and therefore fully pervious. Any passive coating such as "shrink-wrapping" would plug the through pores during the passive coating. The coating would naturally leach out during the operation and subsequently create a void.

Q: How are you then coating it?
A: Bonding. Covalent coating using proprietary chemistry. The coating is such that it does not leave any non specific patches on the surface of the stationary phase.
The coating neither leaches nor does it plug the through pores.

Q: How do you compare the performance of the media before and after the coating?
A: Considering the orthogonal change in property, the performances compare favorably.

 

Contact us with your questions at:
info@orachrom.com
We will answer them to the best of our ability.