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Method for computing absorbance by approximate expression

A calculation method and technology of absorbance, applied in the field of absorbance calculation using approximate formula, can solve problems such as body differences, and achieve the effect of improving production efficiency

Active Publication Date: 2010-10-13
SATAKE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

That is, if a calibration curve generated based on the wavelength measured in the reference device is installed in a sub-device whose measured wavelength deviates from that of the reference device, the difference between the reference device and the reference device will be caused by the deviation. body differences between subdevices

Method used

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  • Method for computing absorbance by approximate expression
  • Method for computing absorbance by approximate expression

Examples

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Embodiment

[0058] The calculation method of the absorbance of the present invention actually represents an example of reducing the variation in the body. In this embodiment, the spectroscopic analyzer 6 is used as a reference device, the absorbance obtained by the reference device is used to generate a calibration curve, and the calibration curve is mounted in another spectroscopic analyzer 6B, and by using the spectroscopic analyzer 6B, 6B Measures a sample different from the sample (sample) used for generating the calibration curve to confirm the effect.

[0059] Specifically, first, 48 samples (hereinafter referred to as "sample A") were measured in the spectroscopic analyzer 6 as a reference device. For the sample A, grain-based brown rice was used, and 24 pieces of domestic (Japanese) rice produced in 2005 and 24 pieces of domestic (Japanese) rice produced in 2006 were used as the brown rice. Using the primary differential absorbance measured on the sample A as an explanatory varia...

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Abstract

To provide a method which is aimed at correcting a machinery difference, that is capable of determining absorbance at the same wavelength in the respective apparatuses even in the case in which there is drift between measurement wavelengths between respective spectroscopic analysis apparatuses due to an individual difference in spectroscopes mounted thereon. Technical means for irradiating a light including a plurality of wavelengths onto an object to be measured, receiving a reflected light or a transmitted light from the object to be measured, determining absorbances at a plurality of wavelengths on the basis of information obtained by receiving the light, determining a second- or higher-order regression formula with the wavelengths of the light as explanatory variables and the absorbances as objective variables by use of the plurality of absorbances, and calculating absorbance at a specified wavelength by substituting a value of the specified wavelength for the regression formula. Further, it is also possible to calculate derivative absorbance at a specified wavelength by differentiating the regression formula and substituting a value of the specified wavelength for the differentiated regression formula.

Description

technical field [0001] The present invention relates to a method of obtaining an approximate expression of absorbance by using information of the measured absorbance, and calculating the absorbance of a specific wavelength based on the approximate expression, and also relates to a method capable of calculating the difference between a plurality of spectroscopic analysis devices. Specific wavelength absorbance common among techniques. Background technique [0002] Currently, the components of an object to be measured such as grains are measured non-destructively by spectroscopic analysis. This measurement is performed by applying information on absorbance obtained from transmitted light or reflected light of an object to be measured to a previously prepared calibration curve. [0003] The calibration curve is made using absorbance or differential absorbance. For example, Patent Document 1 describes that differential absorbance is obtained from absorbance, and a calibration ...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N21/27G01N21/35G01N21/359
CPCG01N21/31G01N21/274
Inventor 石突裕树坂本尚志
Owner SATAKE CORP
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