Chemistry: analytical and immunological testing – Food or dairy products
Patent
1997-10-01
1999-09-14
Warden, Jill
Chemistry: analytical and immunological testing
Food or dairy products
426248, 426231, 426240, 422 67, 422 8205, 422 8209, 436 8, 25033907, 25033911, 2503418, 250372, 356300, 356326, 356328, 356402, 356419, G01N 3302
Patent
active
059522348
ABSTRACT:
A method for measuring ash content of food stuff is carried out by 1) preparing, with respect to food stuff samples whose ash content values are known, a calibration curve by a non-linear analysis of absorbance values and the known ash content of each sample, the absorbance values being obtained by irradiating light having particular wavelengths containing at least an ultraviolet ray band wavelength, the particular wavelength being specific to organic ingredients well coupled to inorganic ingredients which result in the ash content, and 2) deriving, with respect to a sample whose ash content value is unknown, an ash content value of the sample from absorbance values obtained by irradiating, on the sample, light having the particular wavelengths containing at least the ultraviolet ray band wavelength and from the calibration curve prepared in advance by the non-linear analysis. An apparatus for carrying out the method includes a light source section, a photo detecting section, a storing section for storing the calibration curve, and a calculation section for calculating, with respect to a sample whose ash content value is unknown, the ash content value based on the absorbance values and the calibration curve stored in the storing section. It is possible to speed up the measuring operation and to improve the measuring precision.
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Hosaka Yukio
Imai Takeshi
Kameoka Takaharu
Saito Shinji
Satake Satoru
Carrillo S.
Satake Corporation
Warden Jill
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