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實驗室耗材-標準微粒子試劑 (Particle Size Standards)
Thermo Fisher Scientific Inc. (Original: DUKE Scientific Corporation)
Duke Standards 2000 Series Uniform Polymer Particles
Thermo Scientific* Duke Standards 2000 Series Uniform Polymer Particles are uniform, NIST traceable polystyrene DVB particles with wider size distributions which mimic real world particles and work better on laser diffraction type instruments.
These polymer particles meet the need for NIST traceable size standards that have slightly wider distributions than our monodisperse 3000/4000 series size standards. They are suitable for laser diffraction and other methods for analyzing wide size range materials. The wider distribution of these particles provides light scatter across a range of detectors, resulting in a more repeatable measurement.
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Duke Standards 3K/4K Series Particle Counter Standards
Thermo Scientific* Duke Standards 3K/4K Series Particle Counter Standards are particle size standards for use in particle counting validation for particle counting instruments.
In comparison with our 3000 and 4000 Series products, this product line is precisely diluted for immediate use in laser particle counters with minimal time-consuming concentration adjustments.
Duke Standards 9000 Series Glass Particles
Thermo Scientific* Duke Standards 9000 Series Glass Particles are dry glass NIST traceable size standards.
Glass microspheres can be used in any application that requires a NIST traceable size standard with a narrow size distribution where sample conditions may not be suitable for polystyrene spheres. The glass microspheres provide a better tolerance to chemicals and solvents in addition to higher mechanical and thermal stability.
Duke Standards* 4000 Series Monosized Particles
Thermo Scientific* Duke Standards* 4000 Series Monosized Particles are excellent for use with any application that requires a NIST* traceable size standard with a very narrow standard deviation.
Particle spheres are used instead of irregularly shaped particles to minimize the response of analytical systems to shape effects. Particles from 1 to 160µm are packaged as aqueous suspensions in 15mL dropper-tipped bottles, at an optimum concentration for dispersion, handling and dilution. Diameters of 200µm and larger are packaged as dry sphere particles.
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