Magnetic polystyrene particles

[Just a man]

from
www.microparticles.de/news.html


April 2006


Magnetic polystyrene particles (nominal diam. 22 µm) without and under
the influence of an external magnetic field


Multifunctional superparamagnetic polystyrene particles

MicroParticles GmbH now offers to its customers a series of
monodisperse superparamagnetic polymer particles with well defined
diameters. In addition to plain magnetic particles and magnetic
particles with COOH-modification (COOH >100 µmol/g), we supply
magnetic beads with streptavidin coating (binding capacity: 400-1200
pmol FITC-biotin/mg). Outstanding properties of the new magnetic
microspheres of microParticles GmbH are:

* Narrow size distribution (CV < 5 %) and absolutely spherical
shape.
* Superparamagnetic properties.
* Nanoscale iron oxide particles are uniformly dispersed
throughout the polystyrene matrix.
* The iron oxide content can be adjusted in a wide range up to 70
wt.-%.
* The magnetic microspheres can be supplied in monodisperse
quality with well defined particle diameters in the size range from 1
µm to 50 µm

These particles are excellent tools for separation and purification of
DNA, proteins, or other biotinylated biomolecules, and in several
immunoassays. Rapid, efficient, and gentle separation from the
surrounding media is possible via an external magnetic field which can
be applied just by a permanent magnet.