Bio-Rex® 5 Anion Exchange Resins

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Overview

Analytical Grade Resin Selection Guide
Analytical Grade Resin Selection Guide
Relative Selectivity of Various Counterions on Selected AG Resins
AG 50W-X8 Resin
AG 1-X8 Resin
Counterion
Relative Selectivity
Counterion
Relative Selectivity
H+
1.0
OH–
1.0
Li+
0.85
F–
1.6
Na+
1.5
Propionate
2.6
NH4+
1.95
Acetate
3.2
Mn2+
2.35
Formate
4.6
K+
2.5
HPO4
5.0
Mg2+
2.5
IO3
5.5
Fe2+
2.55
HCO3
6.0
Rb+
2.6
Cl–
22
Cs+
2.7
NO2
24
Zn2+
2.7
BrO3
27
Co2+
2.8
HSO3
27
Cu2+
2.9
CN–
28
Cd2+
2.95
Br–
50
Ni2+
3.0
NO3
65
Ca2+
3.9
ClO3
74
Sr2+
4.95
HSO4
85
Cu+
5.3
Phenate
110
Hg2+
7.2
I–
175
Pb2+
7.5
Citrate
220
Ag+
7.6
Salicylate
450
Ba2+
8.7
Benzenesulfonate
500
Selecting Cation or Anion Exchange Support

Separation strategy for amphoteric molecules. If the molecule is stable at a pH above its pl, an anion exchange support is used. If the molecule is stable at a pH below its pl, a cation exchange support is used.

AG Resin Equivalent Diameters
Analytical Grade Resin Wet Mesh and Equivalent Diameters
Wet mesh (U.S. Standards) 16 20 40 50 80 100 140 200 270 325 400
Diameter, µm 1,180 850 425 300 180 150 106 75 53 45 38

Bio-Rex 5 resins are weak anion exchangers that contain primarily tertiary but also some quaternary amines on a styrenedivinylbenzene lattice. Bio-Rex 5 resins exchange anions such as iodide, bromide, and chloride with weak interactions, allowing easy elution and regeneration. Bio-Rex 5 resins have an affinity for organic acids that can be used to remove acids from sugars.

Bio-Rex 5 resins are available in two dry mesh sizes (100–200 and 200–400) and are all analytical grade purity. They have been exhaustively sized, purified, and converted to make them suitable for accurate, reproducible analytical techniques.

Larger volumes and special packaging for industrial applications are available on request.

Type Weak anion
Functional group R-N+(CH3)2C2H4OH
Matrix Styrene divinylbenzene
Crosslinkage 4%
Approx. MW exclusion 1,400
Operating stability/pH range <7/0–14
Min. wet capacity (meq/ml) 1.1
Nominal density 0.7
Ionic form Chloride
Bio-Rex 5 Resin

140-7841
500 g, anion exchange resin, chloride form, 4% crosslinkage, 100–200 dry mesh size, 75–150 µm wet bead size, ~1,400 MW limit

List Price:   $1,147.00
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Bio-Rex 5 Resin

140-7851
500 g, anion exchange resin, chloride form, 4% crosslinkage, 200–400 dry mesh size, 45–75 µm wet bead size, ~1,400 MW limit

List Price:   $1,775.00
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Number Description Options
LIT207 Instruction Manual, AG 3, AG 4, and Bio-Rex Anion Exchange Resins Click to download