Eichrom supplies an expanding range of cation and anion exchange resins, purified for the needs of analytical applications. These resins are comparable in quality and performance to the AG® Resins supplied by Bio-Rad® Laboratories. Eichrom Technologies has decades of expertise in analytical sample preparation and possesses technical support facilities for radiological and wet chemical applications. Our focus is the development and support of sample preparation methodologies for chemical and biochemical analysis.
Cation Exchange Resins
Eichrom’s line of cation exchange resins for analytical applications are type 50W strong acid cation exchange resins (sulfonic acid exchange groups on styrene divinyl benzene polymeric beads.) Our resins are available in 4% and 8% DVB cross linkages. ( Contact us for availability of additional cross linked versions.) All our cation exchange resins are provided in hydrogen form. Our cation resins are supplied in the following dry mesh ranges: 50 – 100, 100 – 200, and 200 – 400.
Cation Exchange Resin Specifications
| % crosslinked | Minimum Wet Exch. Cap. (meq/ml) | Water Ret. Cap. (H+ Form) | Maximum Extractable Residue* |
| 4% | 1.1 | 64 – 72% | 1 mg/g |
| 8% | 1.7 | 50 – 58% | 1 mg/g |
*Per ASTM D 5627, Standard Test Method for Water Extractable Residue from Particulate Ion Exchange Resins
Typical Applications for Cation Exchange Resins: 4% and 8% cross-linked:
- Removal of ethidium bromide from DNA samples
- Removal of propidium iodide from DNA samples
- Separation and preconcentration of peptides and amino acids.
- Removal of cations (desalting)
- Separation of metal ions
Anion Exchange Resins
Eichrom’s line of analytical anion exchange resins are type 1 strong base anion exchangers (quarternary amine functional groups on styrene divinyl benzene polymeric beads.) DVB cross linkages of 4% and 8% are currently available in dry mesh sizes of 50 – 100, 100 – 200, and 200 – 400. All resins are available in the chloride form. Contact us for availability of other cross-linked or mesh size versions.
Anion Exchange Resin Specifications
| % crosslinked | Minimum Wet Exch. Cap. (meq/ml) | Water Ret. Cap. (Cl- Form) | Maximum Extractable Residue* |
| 4% | 1.0 | 55 – 63% | 1 mg/g |
| 8% | 1.2 | 39 – 45% | 1 mg/g |
*Per ASTM D 5627, Standard Test Method for Water Extractable Residue from Particulate Ion Exchange Resins
Our ion exchange resins are available in a variety of package sizes including: 500 gram bottles, cases of 9 bottles, and 10 kg drums.
Typical Applications for Anion Exchange Resins: 4% and 8% cross-linked.
- Exchange of anions of salts
- Separation of uranium complexes (uranyl ions)
- Low molecular weight inorganic anions
- Cyclic nucleotide assays
- Fractionation of organic acids.