Instrument and method for optical particle sensing
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United States of America Patent
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May 27, 2014
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app pub date -
May 20, 2010
filing date -
May 26, 2009
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Abstract
A new device capable of measuring the number of particles present in a colloidal suspension is disclosed, which includes a forward scatter detector, an extinction detector, a laser beam, a cylindrical lens with which to create a plane of light through which particles can pass, and the various pumps and tubing needed to pass the colloidal suspension through the plane of light. The device is particularly designed for measuring particles which have different refractive indices, and which are in the size range of between about 0.7 to 2 microns. The device can determine the presence or absence of biological particles of interest in a given sample, by incubating a sample with a given ratio of active particles and marker particles, and determining whether the ratio of active particles and marker particles has changed. Additional binding and/or non-binding particles can also be present, and kits including the particles are also disclosed.
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