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Discovery DSC-NH2 SPE Tube, bed wt. 2 g, volume 12 mL, pk of 20

Code: 52641-U D2-231

General description

Retention Mechanism: Normal phase or Anion-exchangeSample Matrix Compatibility: Organic or aqueous solutions• Polymerica...

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General description

Retention Mechanism: Normal phase or Anion-exchangeSample Matrix Compatibility: Organic or aqueous solutions• Polymerically bonded, aminopropyl phase that is very polar in nature (hydrogen bonding) allowing for both normal phase and ion exchange applications• A weak anion exchanger with a pKa of 9.8. At pH 7.8 or below, the functional groups are positively charged• Ion exchange capacity is ~ 0.43 meq/g.• Allows the rapid release of very strong anions such as sulfonic acids that may be retained irreversibly by strong anion exchangers• Can be used in some reversed-phase applications (due to ethyl spacer); however, it is predominately used as an ion-exchange or normal phase sorbent due to its polar nature

Legal Information

Discovery is a registered trademark of Sigma-Aldrich Co. LLC

matrix active groupamino phase
materialPE frit (20 µm)
materialpolypropylene
matrixsilica gel base material (irregularly shaped, acid washed)
pore size70 Ã… pore size
compositionbed wt., 2 g
Featured IndustryFood and Beverages
volume12 mL
separation techniquenormal phase
separation techniqueion exchange
Quality Level100
featureendcapped
particle size50 µm
pKa9.8
surface area480 m2/g
capacity~0.43 meq/g capacity
packagingpk of 20