| 摘要 |
PURPOSE:To improve the precision by measuring the concentration of the same liquid to be examined for correction with measuring wavelength light of individual items in case of colorimetric photometry of measuring items and using the measured conventration due to measuring wavelength light to correct data in every corresponding items in accordance with a specific calculating formula. CONSTITUTION:The luminous flux from a light source 1 is allowed to pass a lens 2, a stop 3, and a blank liquid 4 to be examined and is made incident on a photodetector 6 by a filter 5, which permits only prescribed wavelength light to pass through, and is converted photoelectrically. Data BLANK (lambda1-lambda7) obtained by measuring photoelectric conversion outputs corresponding to absorbancies of the blank liquid 4 to be examined to the respective wavelength light rays lambda1-lambda7 are stored in a memory together with measured data. Operations are performed for every measuring itsm in accordance with (the measured concentration of a material to be examined)-K.(the measured concentration of the blank liquid 4 to be examined) (K is a coefficient) and data of the blank liquid 4 to be examined which are measured with the same wavelength light are used to correct data of corresponding measuring items. Thus, the number of measuring items is increased, and high-precision corrected data are attained efficiently.
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