Methods and systems for computing a particle size distribution of small partcles in a process
First Claim
1. A method for computing small particle size distributions of sample particles in a process stream, said sample particles provided in a sample colloid, said method comprising:
- providing a reference matrix of pre-computed or pre-measured reference vectors, each reference vector representing a discrete particle size of a particle size distribution of particles contained in a dilute colloid, each the reference vector representing a reference extinction spectrum over a predetermined wavelength range;
providing a measurement vector representing a measured extinction spectrum of the sample particles in the sample colloid, wherein the measured extinction spectrum has been spectrophotometrically measured; and
determining at least one of a particle size, the particle size distribution, and at least one particle concentration of the particles in the sample colloid, using the reference matrix, the measurement vector and linear equations.
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Abstract
Methods, systems and computer readable media for computing small particle size distributions of particles in a process stream comprising a sample dilute colloid. A reference matrix of pre-computed reference vectors is provided. Each reference vector represents a discrete particle size or particle size range of a particle size distribution of particles contained in a dilute colloid. Each reference vector represents a reference extinction spectrum over a predetermined wavelength range. A measurement vector representing a measured extinction spectrum of the sample particles in the sample colloid is provided, wherein the measured extinction spectrum has been spectrophotometrically measured over the wavelength range. The particle size distribution and particle concentrations of the particles in the sample colloid are determined using the reference matrix, the measurement vector and linear equations.
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Citations
33 Claims
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1. A method for computing small particle size distributions of sample particles in a process stream, said sample particles provided in a sample colloid, said method comprising:
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providing a reference matrix of pre-computed or pre-measured reference vectors, each reference vector representing a discrete particle size of a particle size distribution of particles contained in a dilute colloid, each the reference vector representing a reference extinction spectrum over a predetermined wavelength range; providing a measurement vector representing a measured extinction spectrum of the sample particles in the sample colloid, wherein the measured extinction spectrum has been spectrophotometrically measured; and determining at least one of a particle size, the particle size distribution, and at least one particle concentration of the particles in the sample colloid, using the reference matrix, the measurement vector and linear equations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for measuring change of particle size of small particles dispersed in a fluid medium constituting a sample colloid, said method comprising:
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providing a reference matrix of pre-computed or pre-measured reference vectors, each said reference vector representing a discrete particle size of a particle size distribution of particles contained in a dilute colloid, each said reference vector representing a reference extinction spectrum over a predetermined wavelength range; real time measuring a measurement vector representing a measured extinction spectrum of the small particles of the sample colloid, by spectrophotometry over the wavelength range; and determining at least one of a particle size, the particle size distribution, and at least one particle concentration of the particles in the sample colloid, using said reference matrix, said measurement vector and linear equations. - View Dependent Claims (23, 24, 25, 26)
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27. A system for measuring small particle size distributions of sample particles in a process stream comprising a sample dilute colloid, said system comprising:
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a processor; a reference matrix of pre-computed or pre-measured reference vectors stored in memory that is accessible by said processor, each reference vector representing a discrete particle size of a particle size distribution of particles in a dilute colloid, each said reference vector representing a reference extinction spectrum over a predetermined wavelength range; and programming configured to be run by said processor, when the system is provided with a measurement vector representing a measured extinction spectrum of the sample particles in the sample colloid, wherein the measured extinction spectrum has been spectrophotometrically measured, to cause said processor to perform operations comprising; determining at least one of a particle size, the particle size distribution, and at least one particle concentration of the particles in the sample colloid, using the reference matrix, the measurement vector and linear equations. - View Dependent Claims (28, 29, 30)
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31. A computer readable medium carrying one or more sequences of instructions for computing small particle size distributions of sample particles in a process stream, the sample particles provided in a sample colloid, and wherein execution of the one or more sequences of instructions by one or more processors causes the one or more processors to perform a process comprising:
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receiving a reference matrix of pre-computed or pre-measured reference vectors, each reference vector representing a discrete particle size or particle size range of a particle size distribution of particles in a dilute colloid, each said reference vector representing a reference extinction spectrum over a predetermined wavelength range; receiving a measurement vector representing a measured extinction spectrum of the sample particles in the sample colloid, wherein said measured extinction spectrum has been spectrophotometrically measured; and determining at least one of a particle size, the particle size distribution, and at least one particle concentration of the particles in the sample colloid, using said reference matrix, said measurement vector and linear equations. - View Dependent Claims (32, 33)
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Specification