Magnetic Beads

Superparamagnetic, Non-Aggregating Magnetic Beads for Capturing and Purifying Target Analytes

Magnetic Beads

RayBio® Magnetic Beads are superparamagnetic, non-aggregating iron oxide particles (or ‘microspheres’) for sample prep, or for capturing / purifying (SPRI: Solid Phase Reversible Immobilization) targets such as proteins, antibodies, DNA/RNA (direct, or via ChIP, RIP, or CLIP), and E. coli. The bead's design enables faster binding kinetics, with high sensitivity & selectivity, in both manual and automated biomedical and research applications.

Browse Magnetic Bead Products


  • Uniform size of 0.5 µm
  • Small size and irregular surface allows for increased surface area for binding target molecule
  • Strong magnetic response (3 min to collect at magnet.)Allows for use in viscous samples
  • Non-porous beads
  • Ferric oxide core functionalized with various silane groups
  • Kits and Separators available

Magnetic Bead Separators

RayBio® magnetic separators (or magnetic holders) feature rare-earth magnets embedded in plastic housing, and are available in a variety of shapes and sizes to accommodate tubes, flasks, and plates of different sizes and quantities.

To view all our magnetic separators, click here.

Representative Data

Magnetic Beads Curve

Spectrophotometric curve of high-purity DNA purified from 15 mg of mouse brain tissue using the Genomic DNA Magnetic Bead Kit standard protocol

Magnetic Bead Kits

Our magnetic bead kits include all liquid reagents needed to perform manual purifications using a magnetic separator (not included with the kit). Step by step protocol is easy to follow and includes suggested modifications that can be made to better suit your experiment.

To view all our magnetic bead kits, click here.

How It Works

Magnetic Beads - How it works

Target specific magnetic beads are incubated with the sample solution and then separated by magnets. After the unbound particulates are washed from the beads, the bound molecules are eluted from the beads using the elution buffer. The beads are then magnetically separated from the eluted solution, and the eluted molecules are removed manually.