Spectrometric method free from variations of error factors
First Claim
1. Spectrometric method in which photometric measurement is performed at plural predetermined wavelengths, comprising:
- measuring an output variation due to a predetermined unit of variation for factors causing output variations at every predetermined wavelength;
seeking a subspace which is orthogonal to respective variation vectors defined in a space having a dimension equal to the number of said predetermined wavelengths, each of said respective variation vectors having components corresponding to respective output variations at said wavelengths having been measured in said output variation step;
performing photometric measurement for plural samples having known values of a physical or chemical target quantity, said photometric measurement comprising for each sample respectively, emitting light from a light source, passing said light into and out of each respective sample of said plural samples, sensing said passed light at respective plural predetermined wavelengths for each respective sample, and projecting vectors obtained on the subspace;
calculating a calibration curve using said data obtained in the photometric measurement step, said calibration curve representing a correction of said target quantity with said data.
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Abstract
A spectrometric method for determining a physical or a chemical target quantity by performing the photometric measurement at plural wavelengths predetermined which includes the steps of measuring variation vectors by varying error variation factors by predetermined units which are defined in a space having a dimension equal to the number of the plural wavelengths, seeking for a subspace of the space which is orthogonal to all variation vectors, performing the photometric measurement for samples having known values of the target quantity, projecting vectors obtained from the photometric measurement for samples on the subspace and calculating a calibration curve using data obtained by the projection on the subspace.
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Citations
4 Claims
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1. Spectrometric method in which photometric measurement is performed at plural predetermined wavelengths, comprising:
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measuring an output variation due to a predetermined unit of variation for factors causing output variations at every predetermined wavelength; seeking a subspace which is orthogonal to respective variation vectors defined in a space having a dimension equal to the number of said predetermined wavelengths, each of said respective variation vectors having components corresponding to respective output variations at said wavelengths having been measured in said output variation step; performing photometric measurement for plural samples having known values of a physical or chemical target quantity, said photometric measurement comprising for each sample respectively, emitting light from a light source, passing said light into and out of each respective sample of said plural samples, sensing said passed light at respective plural predetermined wavelengths for each respective sample, and projecting vectors obtained on the subspace; calculating a calibration curve using said data obtained in the photometric measurement step, said calibration curve representing a correction of said target quantity with said data. - View Dependent Claims (2, 3, 4)
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Specification