Reference and calibration materials used in the testing of filtration systems, vial cleaning evaluations, contamination control studies and calibration of injection devices.
Product Detail
ChromoSphere-T polymer microspheres are internally dyed with deeply colored red or black dyes. The intense colors result in very high contrast and visibility relative to most background materials. They are available as dry powders and can be easily be suspended in aqueous media if desired. The mean diameters of ChromoSphere-T Certified Size Standards are traceable to the standard meter through the National Institute of Standards and Technology (NIST) and are calibrated by optical microscopy.
ChromoSphere-T Size Standards were developed for use as reference or calibration materials in applications where a high visual contrast is desired. The product line consists of a large assortment of uniform particle sizes between 50 and 500 microns in either red or black color. The microspheres are made from cross-linked polystyrene divinylbenzene (PS-DVB) copolymer and should be stored at room temperature. They can be dispersed in aqueous media with the aid of a small amount of surfactant or in lower alcohols, such as methanol or ethanol. Some dye extraction will result when the particles are suspended in pure alcohols, but will be minimal. Other organic solvents, such as ethers or chlorinated hydrocarbons, should be avoided because they will swell the particles and completely extract the dye.
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