Raman spectroscopic methods for component particle analysis
First Claim
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1. A method of assessing a geometric property of a particle of a substance in a sample, the method comprising irradiating the sample, generating a first image of Raman-shifted radiation scattered from the sample at a Raman shift value characteristic of the substance, and determining the geometric property from the image.
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Abstract
The invention relates to methods of assessing one or more geometric properties of a particle of a substance using a Raman spectroscopic property of the substance. The method is useful, for example, for assessing particle sizes and size distributions in mixtures containing both particles of the substance and other materials.
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36 Claims
- 1. A method of assessing a geometric property of a particle of a substance in a sample, the method comprising irradiating the sample, generating a first image of Raman-shifted radiation scattered from the sample at a Raman shift value characteristic of the substance, and determining the geometric property from the image.
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35. A method of assessing a geometric property of a particle of a substance in a sample including multiple particles, the method comprising irradiating the sample, identifying the particle of the substance by assessing Raman-shifted radiation at a Raman shift value characteristic of the substance, generating an optical image of particles in the field, and determining the geometric property of the particle of the substance from the optical image.
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36. A method of assessing particles of a first substance and a second substance in a sample, the method comprising irradiating the sample, generating a first image of Raman-shifted radiation scattered from the sample at a Raman shift value characteristic of the first substance, and comparing the first image with a second image of Raman-shifted radiation scattered from the sample at a Raman shift value characteristic of the second substance.
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