Magnetic Macroporous Bead Cellulose and its Derivatives for Magnetic Separations
Magnetic macroporous bead celulose (Types MG) is produced by the same technology as a classic macroporous bead cellulose ( Types MT) with the only difference that MG has in its matrix built in Fe3O4 in amount min. 30 % related to dry matter.
These Fe3O4 particles are present in the cellulose matrix and therefore macroporosity is not influenced by the Fe3O4 particles. This fact corresponds also with a B.V. for Iontosorb MG re-calculated to MT.
If an average experimental B.V.value for MG = 7.4 ml/g of dry matter MG and a determined ash content 29.7 %, then the bellow given equation can be used for the re-calculation of the found B.V. of MG to a calculated B.V., which would correspond to the MT without Fe3O4.
Calculation of B.V. value from MG to MT:
where Ash Content [%] for MG,
B.V. found for MG [ml / 1 grame dry per MG]
Macroporous Bead Cellulose MG and its derivatives can be used for izolation or magnetic modification of biologically active matters, cells, sub-cellular components, contaminants of environment or other matters of studied systems.
Especially advantageous is their use in microbiology, cell biology, medicine, biochemistry, biotechnology and ecology.
Size Exclusion Limits for Properties (Porosity) of Individual MG types
Macroporous Bead Cellulose MG types are highly porous gels well accessible for large macromolecules, as it is shown in this Figures.
Selectivity curves of Macroporous Bead Cellulose MG types Kav vs. Molecular Weight of Dextran in semilogarithmic scale
B.V. Values for Macroporous Bead Cellulose for Magnetic Separations (MG)
|
Porosity of MG |
B.V. for Iontosorb MG [ ml / gram dry ] | |
| minimum | maximum | |
| 50 | 5.0 | |
| 100 | 7.50 | 9.10 |
| 200 | 9.30 | 10.60 |
Macroporous Bead Cellulose MG is produced in porosity 100 and 200 (for wish also porosities 50) can be prepared and in particle sizes given in a table:
| Porozity | Particle size [microns] |
| 100 | 30 - 50 |
| 50 - 80 | |
| 80 - 100 | |
| 200 | 30 - 50 |
| 50 - 80 | |
| 80 - 100 | |
| 50 | 30 - 50 |
| 50 - 80 | |
| 80 - 100 |
All types of sorbents can be delivered also as MAGNETIC SORBENTS used for magnetic separations.
Magnetic sorbents can be delivered in the same assortment as non-magnetic sorbents as it is written in webpages PRODUCTS.
Detailed informations on individual sorbents (without magnetic modifications) can be found in the part Products.
Magnetic sorbents are delivered in the following packings:
| 50 ml |
| 100 ml |
| 250 ml |
| 500 ml |
| 1 000 ml |
| 2 000 ml |
| 2 500 ml |
Basic properties of derivatives Iontosorb are the same both for magnetic or non-magnetic beads.