Thermo Fisher Scientific Sulfate Latex Beads, 4% w/v, 4 μm

Invitrogen™ Sulfate Latex Beads, 4% w/v, 4 μm

Microspheres (also called latex beads or latex particles) are spherical particles in the colloidal size range that are formed from an amorphous polymer such as polystyrene. Because of the way that the polystyrene chains arrange themselves in the bead, the surface is very hydrophobic in character, making these ideal materials for the adsorption of materials such as proteins.

These sulfate latex microspheres are stabilized by sulfate charges. In some cases, hydroxyl and carboxyl groups are also present in small amounts bound to the polymer chains. The pKa of the sulfate group is <2 and consequently the particles are stable in acidic media. Suspensions of the particles are stable up to almost 0.30 M univalent electrolyte concentrations and therefore may be used in media of physiological ionic strength. However, they are hydrophobic particles and will undergo aggregation in the presence of low concentrations of divalent or trivalent cations unless stabilized by a hydrophilic coating.

Sulfate latex is suitable for calibration of particle size analysis equipment and is also appropriate for use in diagnostic test systems that rely upon physical adsorption of antigens or antibodies.

Microspheres Are Available in Many Sizes and Surface Functionalities

• 25 sizes available — from 0.02 μm to 16 μm
• 20 different surface types — ready for conjugation to virtually any material
• Surfactant-free — ultraclean
• Available in various quantities — from milliliters to 500-liter amounts

Key Applications of Microspheres

• Instrument calibration (flow cytometry, microscopy, HTS, HCS)
• Flow testing (microfluidics, blood flow, water flow, air flow)
• Cell biology tracers (cell differentiation and tracing)
• Immunoassays (agglutination tests, ELISA, particle capture, contrast reagents)

Custom Microsphere Production

If you don’t see the microsphere you’re looking for in our stocked list, we can make a custom microsphere for you. Our custom conjugation service is efficient and confidential, and we guarantee the quality of our work.
We are ISO 13485:2000 certified.

제품 사양