Express-Ion® Ion-Exchangers Media. Whatman
Whatman / Schleicher & Schuell (GE Healthcare)

Express-Ion® media are matrices whose flow characteristics have been greatly improved. The manufacturing process has been optimized so that the matrix retains its inherent property of fast kinetics of adsorption and desorption. Media characteristics are; EXPRESS-ION D: A weak anion exchange cellulose substituted with diethylaminoethyl (DEAE) groups and recommended for separations between pH 2 and pH 9. EXPRESS-ION Q: Strong anion exchange cellulose having general applicability in separations requiring an anion exchange step, with the benefit of wide pH versatility. The N,N,N-trimethyl hydroxypropyl amine (quaternary amine) group is fully ionized throughout pH range 2-12. EXPRESS-ION C: Moderately acidic cation exchange cellulose. A weak ion exchanger recommended for separations between pH 4.5 and pH 10 to ensure the carboxymethyl functional group remains ionized. EXPRESS-ION S: Strongly acidic cation exchange cellulose having general applicability in separations requiring a cation exchange step, with the benefit of wide pH versatility. The sulfoxyethyl functional group is fully ionized throughout the pH range 2-12. (Sample Photo Shown. Individual items may differ from the image shown.)

Related Products: Chromatography, Ion Exchange


Cat. No. Mfg. No. Details Click for Spec. Chart Quantity Price
C3221-1

4079-0025

 EXPRESS-ION D, 250g
 each
$444.03
C3221-5

4079-3025

 EXPRESS-ION Q, 250g
 each
$474.93
C3221-12

4079-1025

 EXPRESS-ION C, 250g
 each
$684.37
C3221-13

4079-2025

 EXPRESS-ION S. 250g
 each
$474.93

Properties - EXPRESS-ION High Flow Rate Media
  EXPRESS-ION D EXPRESS-ION Q EXPRESS-ION C EXPRESS-ION S
Type Weak Anion Strong Anion Weak Cation Strong Cation
Working pH range 2 to 9 2 to 12 4.5 to 10 2 to 12
Typical protein capacity mg/ml:        
BSA 60 55 - -
Lysozyme - - 162 153
Small ion capacity 1 meq/dg*
Fiber length 60 to 130 µm
Base matrix Microgranular cellulose
Typical flow rate 150 cm/hr
Physical stability Negligible volume changes due to ionic strength or pH
Bed volume g† / ml 0.72 0.64 0.7 0.8
* dg = dry gram, Typical moisture content 65 to 68%
† grams as supplied

 
Typical Data - EXPRESS-ION linear flow rate (cm/h)
   Linear flow rate (cm/h)
  at 5 psi at 7.5 psi at 10 psi
EXPRESS-ION D 172 214 239
EXPRESS-ION Q 135 174 212
EXPRESS-ION C 94 127 165
EXPRESS-ION S 94 127 161
Column dimensions 45 cm ID x 15 cm H
 
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