• This series of NIST traceable size standards provides an accurate and convenient method for calibrating or checking the performance of laser particle counters used in cleanrooms and other contamination monitoring applications. The products are suspensions of monodisperse polystyrene spheres (PSL) for use in airborne or liquid particle dispersion systems. They are available in a range of sizes from 0.1 to 100µm in diameter. The particles are prepared as low residue aqueous suspensions for minimal background interference, packaged in 15mL dropper-tipped vials. The particle diameters are calibrated by electron or optical microscopy. Each package includes a Certificate of Calibration and Traceability to the National Institute of Standards and Technology (NIST). In comparison with the well established 3000 and 4000 Series products described elsewhere, these product lines are precisely diluted for immediate use in laser particle counters with minimal time-consuming adjustments of concentration.
  • These uniform microspheres are NIST-traceable by calibration methods such as optical microscopy. Products from 1 to 160µm in diameter are packaged as aqueous suspensions of polystyrene spheres in dropper-tipped bottles. Diameters of 200µm and larger are packaged as dry spheres in screw-capped bottles. These larger particles are composed of polystyrene DVB (divinylbenzene). The spheres have a density of 1.05g/cm3 and an index of refraction of 1.59 @ 589nm.
  • Small borosilicate glass microspheres have fewer spherical imperfections and inclusions than other glass microspheres. They also have better mechanical and thermal stability. This series has been calibrated with NIST traceable methods of optical microscopy. They are packaged as dry powders in 1 gram bottles. They have a density of 2.50-2.55g/cm 3 and an index of refraction of 1.56 @ 589nm (23°C). Brands: Thermo Scientific
  • Duke Scientific Corporation's new COUNT-CAL™ is a cost effective and convenient product for validating particle counters. Packaged in single-use bottles, and intended to be sampled directly from the bottle, it eliminates the need for serial dilutions and extensive sample handling, thereby minimizing contamination. The particles are suspended in an ultraclean diluent and the concentration is optimized for use in light obscuration particle counters and other low concentration counting applications. The particle diameters are traceable to the Standard Meter through the National Institute of Standards and Technology (NIST).
  • Ezy-Cal™

    1.00
    This product line offers a series of ready-to-use standards for validating optical particle counters with no dilution and handling. The products are suspensions of monodisperse polymer microspheres in water with a concentration of 2000 particles per mL. A magnetic stir bar is included in each bottle for clean, convenient and direct sampling by instruments. This series of size standards is provided for setting or checking the calibration of channel thresholds or for checking the count precision of liquid-borne particle counters. Their certified diameters are traceable to NIST. They are packaged as 100mL screw-cap bottles, sufficient for four or five calibration procedures on most counters. The microspheres are composed of polystyrene, which has an index of refraction of 1.59 @ 589nm and a density of 1.05 g/cm3. The aqueous suspension medium contains a combination of dispersing agents, which help to keep the particles from clumping or sticking to flow surfaces in the particle counter. The EZY-CAL™ product line meets all of the unique and demanding requirements of the contamination control laboratory in modern industries.
  • Fluoro-Max™
  • Fluoro-Max™
  • Fluoro-Max™
  • Fluoro-Max™
  • Fluoro-Max™
  • Fluoro-Max™
  • carboxylate particles Control sensitivity, specificity and stability with various acid content available within Thermo Scientific™ Opti-Link™ Carboxylate-Modified Particles. Particles contain carboxylic acid groups for covalent coupling and can be used directly from the bottle in a variety of applications. • Parking area combines surface area and acid content to give you the surface acid distribution that is useful for assay optimization • Surface area per gram of a particle varies inversely with the particle diameter • Acid content refers to the titrated milliequivalents per gram (mEq/g) and is weight-based • For most applications, particles can be used directly from the bottle without any pre-cleaning • Proprietary anionic surfactant does not interfere with binding of proteins nor cause proteins to desorb from particle surfaces or cause proteins to desorb from particle surfaces • Various surface acid concentrations available to help optimize reagent development efforts • Particles have been used in and are equally successful in molecular biology and research applications Parking Area Properties • Low Acid Content—60–100 Parking Area—Hydrophobic surface, more colloidally stable than plain polystyrene • Medium Acid Content—35–59 Parking Area—Hydrophobic and hydrophilic areas; good colloidal stability and good covalent coupling • High Acid Content—10–34 Parking Area—Hydrophilic surface; excellent colloidal stability; excellent covalent coupling When using Opti-Link particles, ask about our Microparticle Reagent Optimization manual, which outlines our reagent development strategy. This manual includes validated binding, coupling and particle reagent optimization protocols. Power-Bind Sterptavidin Onderstaande tekst volledig overgenomen van Thermo website Bind a variety of biotinylated ligands, including DNA/RNA, oligos, antibodies and proteins with Thermo Scientific™ Power-Bind Streptavidin Coated Particles. Particles have very high and stable biotin binding capacities and address the concerns of diagnostic test kit manufacturers and nucleic acid researchers. The microparticles reduce serum matrix effects and improve assay accuracy, resulting in low, non-specific binding of serum proteins and other interfering substances. The use of microparticles as a solid phase support in various immunoassays and affinity purifications has been known for some time; however, achieving high activity and stable binding of solid phase ligands has been a major difficulty. Biotinylated compounds become stably bound to Power-Bind Streptavidin Coated particles after simple incubation in buffer due to the high affinity of the biotin-streptavidin interaction. The particles also function as a spacer, which improves the specific activity of the bound ligand. Monodisperse nonmagnetic particle suspensions with streptavidin covalently bound to the surface in a highly active form Features: • Made from 0.3μm or 0.8μm Thermo Scientific™ OptiLink™ Carboxylate-Modified particles • High biotin-binding capacity • Long shelf life • Simplifies the process of binding ligands to particles • Combines the advantages of high surface area and easy, high affinity, high specific activity binding • Excellent for chemiluminescent assays, biotinylated ligand capture, and for molecular biology, immunoassay, or sample prep applications • • Benefits: • Dissociation constant (Kd 10-15 molar), easy one-step binding protocols for biotinylated ligands • High activity of surface bound ligands to easily solve difficult coupling problems • Simple aqueous biotinylation reactions • Low nonspecific interactions (blocked microparticle surface) • Highly mobile particles for membrane-based applications • Can be used in EIA formats with biotin/enzyme detection systems • Beneficial spacer effect of SA molecule • A choice of 0.3μm or 0.8μm diameters for different application requirements Recommended for: • Universal nonmagnetic bead for coupling unique ligands. • Clinical diagnostics and molecular biology applications.
  • carboxylate particles Control sensitivity, specificity and stability with various acid content available within Thermo Scientific™ Opti-Link™ Carboxylate-Modified Particles. Particles contain carboxylic acid groups for covalent coupling and can be used directly from the bottle in a variety of applications. • Parking area combines surface area and acid content to give you the surface acid distribution that is useful for assay optimization • Surface area per gram of a particle varies inversely with the particle diameter • Acid content refers to the titrated milliequivalents per gram (mEq/g) and is weight-based • For most applications, particles can be used directly from the bottle without any pre-cleaning • Proprietary anionic surfactant does not interfere with binding of proteins nor cause proteins to desorb from particle surfaces or cause proteins to desorb from particle surfaces • Various surface acid concentrations available to help optimize reagent development efforts • Particles have been used in and are equally successful in molecular biology and research applications Parking Area Properties • Low Acid Content—60–100 Parking Area—Hydrophobic surface, more colloidally stable than plain polystyrene • Medium Acid Content—35–59 Parking Area—Hydrophobic and hydrophilic areas; good colloidal stability and good covalent coupling • High Acid Content—10–34 Parking Area—Hydrophilic surface; excellent colloidal stability; excellent covalent coupling When using Opti-Link particles, ask about our Microparticle Reagent Optimization manual, which outlines our reagent development strategy. This manual includes validated binding, coupling and particle reagent optimization protocols. Power-Bind Sterptavidin Onderstaande tekst volledig overgenomen van Thermo website Bind a variety of biotinylated ligands, including DNA/RNA, oligos, antibodies and proteins with Thermo Scientific™ Power-Bind Streptavidin Coated Particles. Particles have very high and stable biotin binding capacities and address the concerns of diagnostic test kit manufacturers and nucleic acid researchers. The microparticles reduce serum matrix effects and improve assay accuracy, resulting in low, non-specific binding of serum proteins and other interfering substances. The use of microparticles as a solid phase support in various immunoassays and affinity purifications has been known for some time; however, achieving high activity and stable binding of solid phase ligands has been a major difficulty. Biotinylated compounds become stably bound to Power-Bind Streptavidin Coated particles after simple incubation in buffer due to the high affinity of the biotin-streptavidin interaction. The particles also function as a spacer, which improves the specific activity of the bound ligand. Monodisperse nonmagnetic particle suspensions with streptavidin covalently bound to the surface in a highly active form Features: • Made from 0.3μm or 0.8μm Thermo Scientific™ OptiLink™ Carboxylate-Modified particles • High biotin-binding capacity • Long shelf life • Simplifies the process of binding ligands to particles • Combines the advantages of high surface area and easy, high affinity, high specific activity binding • Excellent for chemiluminescent assays, biotinylated ligand capture, and for molecular biology, immunoassay, or sample prep applications • • Benefits: • Dissociation constant (Kd 10-15 molar), easy one-step binding protocols for biotinylated ligands • High activity of surface bound ligands to easily solve difficult coupling problems • Simple aqueous biotinylation reactions • Low nonspecific interactions (blocked microparticle surface) • Highly mobile particles for membrane-based applications • Can be used in EIA formats with biotin/enzyme detection systems • Beneficial spacer effect of SA molecule • A choice of 0.3μm or 0.8μm diameters for different application requirements Recommended for: • Universal nonmagnetic bead for coupling unique ligands. • Clinical diagnostics and molecular biology applications.
  • Polymer particle suspensions
  • Polymer particle suspensions
  • Polymer particle suspensions
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