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Dokumentenidentifikation EP0756168 18.05.2006
EP-Veröffentlichungsnummer 0000756168
Titel Verfahren zur Messung von Amadori-Verbindungen durch Lichtstreuung
Anmelder ARKRAY, Inc., Kyoto, JP
Erfinder Yamaguchi, Kyoto Dai-ichi Kagaku, Yoshinori, Higashi Kujo, Minami-ku, Kyoto 601, JP;
Dou, Kyoto Dai-ichi Kagaku Co., Xiaoming, Higashi Kujo, Minami-ku, Kyoto 601, JP;
Yagi, Kyoto Dai-ichi Kagaku Co., Masayuki, Higashi Kujo, Minami-ku, Kyoto 601, JP;
Uenoyama, Kyoto Dai-ichi Kagaku Co., Harumi, Higashi Kujo, Minami-ku, Kyoto 601, JP
Vertreter Schoppe, Zimmermann, Stöckeler & Zinkler, 82049 Pullach
DE-Aktenzeichen 69635971
Vertragsstaaten DE, FR, GB, IT
Sprache des Dokument EN
EP-Anmeldetag 19.07.1996
EP-Aktenzeichen 961116977
EP-Offenlegungsdatum 29.01.1997
EP date of grant 29.03.2006
Veröffentlichungstag im Patentblatt 18.05.2006
IPC-Hauptklasse G01N 21/65(2006.01)A, F, I, 20051017, B, H, EP
IPC-Nebenklasse G01N 21/00(2006.01)A, L, I, 20051017, B, H, EP   G01N 33/66(2006.01)A, L, I, 20051017, B, H, EP   G01N 33/68(2006.01)A, L, I, 20051017, B, H, EP   

Beschreibung[en]
BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to a method of making quantitative measurement of an Amadori compound such as saccharified albumin, saccharified hemoglobin or saccharified globulin.

Description of the Background Art

When a substance (hereinafter referred to as protein or the like) having an amino group such as protein, peptide or amino acid coexists with reducing sugar such as aldose, partial amino and aldehyde groups are nonenzymatically and non-reciprocally bonded to each other to cause Amadori rearrangement, thereby forming an Amadori compound. The formation rate of the Amadori compound is expressed in a function such as the concentration of the reactive substance, the contact time, the temperature or the like. Thus, it is considered that various data related to the substance containing the reactive substance can be obtained from the amount of formation thereof. Substances containing Amadori compounds are food such as soy sauce, body fluids such as blood and the like.

In an organism, for example, glucose is bonded to amino acid, to form a fructosylamine derivative which is an Amadori compound. A fructosylamine derivative formed by saccharification of hemoglobin in the blood is called glycohemoglobin, a fructosylamine derivative formed by saccharification of albumin is called glycoalbumin, and a fructosylamine derivative formed by saccharification of protein in the blood is called fructosamine. The intravascular concentration of such a fructosylamine derivative reflects the average blood-sugar level in a past constant period and its measured value can be an important index for diagnosis of a diabetic condition and control of the condition, and hence establishment of Amadori compound measuring means is clinically extremely useful. Further, it is possible to recognize the state and the period of preservation of food after production by determining an Amadori compound contained in the food, and this is conceivably usefully for quality control.

Thus, quantitative analysis of an Amadori compound is useful over wide fields including those of medical science and food.

In general, a method utilizing high-speed liquid chromatography (refer to Chromatogr. Sci., 10, 659 (1979)), a method employing a column which is filled with a solid bonded to boric acid (refer to Clin. Chem., 28, 2088 (1982) ), electrophoresis (refer to Clin. Chem. 26, 1598 (1980)), a method utilizing antigen-antibody reaction (refer to JJCLA, 18, 620 (1993) and Kiki·Shiyaku, 16, 33-37 (1993)), a fructosamine measuring method (refer to Clin. Chem. Acta., 127, 87-95 (1982)), a method of making colorimetric determination after oxidation with thiobarbituric acid (refer to Clin. Chem. Acta., 112, 179-204 (1981), radio immunoassay (RIA) and the like are known as methods of determining Amadori compounds.

However, each of the electrophoresis and the chromatography requires a long time for measurement with a complicated operation, while a measured absolute value of protein is so influenced by a substance having close affinity contained in a mixed substance that correct quantitative measurement is hard to make.

While RIA is superior in sensitivity, specificity and reproducibility, a labelling process is complicated and troublesome.

While the fructosamine measuring method utilizes reducing power of fructosamine in an alkaline solution, a measuring error is readily caused by an influence from another reducing substance.

While it is simple and effective if an Amadori compound such as saccharified protein can be determined by irradiating a substance with light and employing its light scattering spectrum, no such example of measuring an Amadori compound through such a light scattering spectrum has been reported.

Chira et al., "Light Scattering by Blood Components after Supplying Glucose", Biomed Technik, Vol. 35, No. 5, 1990, pages 102-106 describes a use of light scattering for analyzing blood components. A laser beam is focused on a sample cell and the intensity of laser light scattering is investigated between angles of 3° and 23°. Changes of the mean value of the intensity of the scattered light have been determined after supplying human albumin and glucose for determining relative values of the change of the various blood components and Amadori products.

Tammic et al., "The Infrared Spectra and Structure of the Amadori Product Formed from Glucose and Glycine", Applied Spectroscopy, Vol. 39, No.4, 1985, pages 591-594) shows optical IR spectroscopy for DFG (deoxyfructose glycine). Spectra are recorded for three ionic forms of DFG and several bands are observed for the different ionic forms.

The problem of the present invention is to provide a simple and improved method for measuring an Amadori compound.

The above object is solved by a method according to claim 1.

The present invention is adapted to irradiate a sample containing an Amadori compound with excitation light of a single wavelength for receiving scattering light from the sample and separating the same into its spectral components for obtaining a light scattering spectrum, and make quantitative measurement of the Amadori compound through a light scattering peak existing at 820 to 840 cm-1, 1655 to 1660 cm-1, 2000 to 2020 cm-1, 2080 to 2100 cm-1, 2460 to 2470 cm-1 or 2530 to 2600 cm-1 in shift wavenumber with respect to the excitation wavelength in the light scattering spectrum.

In the light scattering spectrum obtained by irradiating the sample containing an Amadori compound with excitation light of a single wavelength, light scattering peaks overlap with a fluorescence spectrum. When an arithmetic operation of removing the fluorescence spectrum part is performed, it is easy to obtain a peak intensity or an integral value of any of the light scattering peaks. Then, quantitative measurement of the Amadori compound can be carried out on the basis of the peak intensity or the integral value thus obtained.

Thus, the present invention is simply adapted to irradiate a sample with excitation light of a single wavelength, receive scattered light from the sample and separate the same into its spectral components, whereby an Amadori compound can be quantitatively measured by a simple optical measuring method.

The quantitative measurement includes both of the case of measuring the amount of an Amadori compound contained in a sample, and the case of measuring the saccharification ratio of protein or the like in the sample. The saccharification ratio is defined as follows: ( Amadori   compound ) ( Amadori   compound + protein   or   th   like ) Every measured value can be obtained through a calibration curve.

In the obtained light scattering spectrum, the fluorescence spectrum reflects the total sum of (Amadori compound + protein or the like). In a preferred method of measuring the saccharification ratio of protein or the like, therefore, correct measurement can be made by employing the ratio I/S of a peak intensity or an integral value I of any of light scattering peaks of the light scattering spectrum to an integral value S of a wavenumber region arbitrary set by excluding 820 to 840 cm-1, 1655 to 1660 cm-1, 2000 to 2020 cm-1, 2080 to 2100 cm-1, 2460 to 2470 cm-1 and 2530 to 2600 cm-1 in shift wavenumber with respect to the excitation wavelength in the light scattering spectrum.

The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

  • Figs. 1A and 1B illustrate the light scattering spectra of human serum albumin samples having saccharification ratios of 24. 1 % and 58.2 % respectively;
  • Fig. 2 illustrates the light scattering spectrum of an aqueous glucose solution of a high concentration;
  • Figs. 3A and 3B illustrate light scattering spectra obtained by performing an arithmetic operation of removing fluorescence spectra from the spectra shown in Figs. 1A and 1B;
  • Fig. 4 illustrates a calibration curve showing the relation between peak intensities of single peaks of light scattering spectra and saccharification ratios;
  • Fig. 5 illustrates a calibration curve showing the relation between integral values of the single peaks of the light scattering spectra and the saccharification ratios;
  • Fig. 6 illustrates the relation between albumin concentrations and integral values of fluorescence spectra;
  • Figs. 7A and 7B illustrate light scattering spectra of an Amadori compound before and after addition of a decomposition enzyme respectively;
  • Fig. 8 illustrates the light scattering spectra of N°-Z-lysine;
  • Fig. 9 illustrates changes of light scattering peaks with time from immediately after addition of the decomposition enzyme in the measurement shown in Figs. 7A and 7B;
  • Fig. 10A illustrates a light scattering spectrum of human blood hemoglobin sample (unknown saccharification ratio) after removing fluorescence spectrum;
  • Fig. 10B illustrates a relation between hemoglobin concentrations and integral values of fluorescence spectra; and
  • Figs. 11A and 11B illustrate light scattering spectra of valine and saccharified valine respectively.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Figs. 1A and 1B illustrate light scattering spectra obtained by irradiating human serum albumin aqueous solutions of 10 mg/dl in concentration having saccharification ratios of 24.1 % and 58.2 % respectively with laser beams of 632.8 nm in wavelength emitted from an He-Ne laser unit of 7 mW in output and exciting the same respectively. Referring to these figures, the axes of abscissas show light scattering shifts from the wavelengths of the He-Ne laser beams in wavenumbers, and the axes of ordinates show scattered light intensities.

In the light scattering spectra shown in Figs. 1A and 1B, sharp peaks appear on the same light scattering shift positions, and the peak intensities are higher in the sample having the higher saccharification ratio. When light scattering spectra of glucose aqueous solutions having similar concentrations to the samples shown in Figs. 1A and 1B were measured, no likes of peaks were observed. Fig. 2 shows the light scattering spectrum of a glucose aqueous solution having a high concentration of 10000 mg/ dl, and some peaks appearing in this figure are different in position from the sharp peaks shown in Figs. 1A and 1B. Consequently, it is understood that the sharp light scattering peaks appearing in Figs. 1A and 1B are not by glucose but by saccharified albumin.

Referring to Figs. 1A and 1B, angled, high and loose peaks are fluorescence from albumin and saccharified albumin, and the light scattering peaks by saccharified albumin overlap with and project from the high fluorescence peaks.

The light scattering peaks by saccharified albumin exist around 830 cm-1, 1658 cm-1, 2009 cm-1, 2082 cm-1, 2463 cm-1 and 2544 cm-1 in shift wavenumber from the wavelengths of the He-Ne laser beams.

Figs. 3A and 3B illustrate light scattering spectra obtained after removing the fluorescence spectrum parts from the light scattering spectra shown in Figs. 1A and 1B as background signals respectively. Thus, the peak intensities and the peak integral values (areas) of the light scattering peaks can be readily obtained by removing the fluorescence spectrum parts.

Fig. 4 illustrates the relation between saccharification ratios and peak heights after removal of fluorescence spectrum parts as to standard samples of human serum albumin aqueous solutions having different saccharification ratios. A peak around 1658 cm-1 in shift wavenumber from the wavelength of an He-Ne laser beam was measured. Standard samples of human serum albumin aqueous solutions having saccharification ratios of 24. 1 % and 58. 2 % are commercially available. Standard samples of other saccharification ratios were prepared by blending the commercially available standard samples with each other. The standard samples shown in Fig. 4 have saccharification ratios of 24.1 %, 31.3 %, 38.7 %, 45.5 %, 51.9 % and 58.2 % respectively. The numerical values of the saccharification ratios of these standard samples were measured with a fully automatic glycoalbumin fraction determination apparatus GAA-2000 (product by Kyoto Daiichi Kagaku Co., Ltd.).

According to Fig. 4, there is a linear relation between the saccharification ratios and the peak intensities of the light scattering peaks, and hence the results can be employed as a calibration curve for saccharification ratios. Further, (saccharified albumin + albumin) concentrations of the standard samples employed for measuring the data for the calibration curve are constant, and hence this calibration curve can also be diverted to that expressing saccharified albumin concentrations and peak intensities of light scattering peaks. When this calibration curve is employed, therefore, the saccharification ratio or the saccharified albumin concentration can be obtained as to an unknown sample by measuring a peak intensity of a light scattering spectrum.

Fig. 5 illustrates results obtained by measuring the relation between the saccharification ratios and the light scattering peak integral values through the integral values of the same peaks of the light scattering spectra by the same standard samples. Also in this case, a linear relation is obtained between the saccharification ratios and the peak integral values, and this relation can also be utilized as a calibration curve. Therefore, the saccharification ratio or the saccharified albumin concentration can be obtained as to an unknown sample by measuring a peak integral value in place of the peak intensity of the peak of the light scattering spectrum.

The linear relations of Figs. 4 and 5 similarly hold also as to the remaining light scattering peaks shown in Figs. 3A and 3B.

In order to obtain the saccharification ratio of an unknown sample from the calibration curve showing the relation between the saccharification ratios and the peak intensities or the peak integral values shown in Fig. 4 or 5, it is necessary to adjust the concentration of the unknown sample so that its (saccharified albumin + albumin) concentration is identical to those of the standard samples, or convert the measured value so that the (saccharified albumin + albumin) concentration is identical. In the light scattering spectra shown in Figs. 1A and 1B, on the other hand, the fluorescence spectra are also detected at the same time in addition to the light scattering peaks. Fig. 6 illustrates results obtained by measuring integral values (intensities on the axis of ordinates) in a region of 416. 508 to 1434. 74 cm-1 in shift wavenumber from the wavelength of the He-Ne laser beam in the fluorescence spectra as to standard samples having different (saccharified albumin + albumin) concentrations. A linear relation is obtained between the (saccharified albumin + albumin) concentrations and the integral values of the fluorescence spectra, and hence the saccharification ratios obtained from the peak intensities or the peak integral values of the light scattering peaks of saccharified albumin can be corrected by the (saccharified albumin + albumin) concentrations on the basis of the integral values of the fluorescence spectra. The wavenumber region for integrating the fluorescence spectra can be arbitrarily selected so far as the fluorescence spectra appear in the region, and is not restricted to the above.

When the ratio I/S of a peak intensity or an integral value I of any of the light scattering peaks to an integral value S of an arbitrarily set wavenumber region of a fluorescence spectrum part of a light scattering spectrum is employed as a parameter for obtaining a calibration curve showing the relation between saccharification ratios and I/S values as to a plurality of standard samples having different saccharification ratios, and I/S values of the light scattering peaks employed for forming the calibration curve are measured as to an unknown sample and applied to the calibration curve, a saccharification ratio corrected with the albumin concentration can be obtained.

While measurement is made as to saccharified albumin among saccharified protein in the above description, these light scattering peaks are observed in common for Amadori compounds such as saccharified peptide and saccharified amino acid, in addition to other saccharified protein. While those clinically important among Amadori compounds are saccharified albumin, saccharified hemoglobin and fructosamine which are saccharified protein, the present invention is also applicable to other Amadori compounds.

Fig. 10A illustrates a light scattering spectrum of human blood hemoglobin sample (unknown saccharification ratio) as another example of saccharified protein. The spectrum is obtained by irradiating the human blood hemoglobin aqueous solution with laser beam of 632.8 nm in wavelength emitted from an He-Ne laser unit of 7 mW in output and removing a fluorescence spectrum part as background signal. Also in the spectrum of Fig. 12A, sharp peaks appear on the same light scattering shift positions as in the spectra of Figs. 3A and 3B.

Fig. 10B illustrates a result obtained by measuring integral values (intensities on the axis of ordinate) in an adequate region in shift wavenumber from the wavelength of the He-Ne laser beam in the fluorescence spectrum as to standard samples having different hemoglobin concentrations. Also in the case of hemoglobin, a linear relation is obtained between the hemoglobin concentrations (i.e. saccharified hemoglobin + hemoglobin) and the integral values of the fluorescence spectra, and hence the saccharification ratios obtained from the peak intensities or the peak integral values of the light scattering peaks of saccharified hemoglobin can be corrected by the hemoglobin concentrations on the basis of the integral values of the fluorescence spectra.

Figs. 7A and 7B illustrate results obtained by decomposing saccharified amino acid which is an Amadori compound with enzyme fructosylamino acid oxidase or the like specifically reacting with a bonded portion (fructose structure) between glucose and amino acid and investigating changes of peaks as an example showing that the six light scattering peaks in each of Figs. 1A and 1B are those specific to an Amadori compound. Fig. 7A illustrates a light scattering spectrum by He-Ne laser excitation of an N'-fructosyl-N'-Z-lysine (FZL) aqueous solution which is saccharified amino acid before reaction with such an enzyme. A light scattering spectrum obtained after reaction of the sample solution with the saccharified amino acid decomposition enzyme is shown in Fig. 7B, and peak intensities of the peaks specific to the Amadori compound are reduced as compared with the spectrum shown in Fig. 7A. A light scattering spectrum obtained by irradiating a standard sample of N°-Z-lysine (&agr;ZL) which is amino acid resulting from decomposition of FZL by the saccharified amino acid decomposition enzyme with an He-Ne laser beam is shown in Fig. 8, wherein no specific light scattering peaks appearing in Figs. 7A and 7B are observed.

Results obtained by measuring changes of the peak intensities at the peaks of 1658 cm-1 in shift wavenumber from the He-Ne laser wavelength with respect to times from addition of the saccharified amino acid decomposition enzyme in Figs. 7A and 7B are shown in Fig. 9. The saccharified amino acid is decomposed by the decomposition enzyme and the peak intensities are reduced with time. Thus, it is understood that these characteristic light scattering peaks are those by bonding between sugar and amino acid.

Figs. 11A and 11B illustrate light scattering spectra of valine as another amino acid and saccharified valine as saccharified amino acid thereof respectively. The spectrum of saccharified valine also has characteristic light scattering peaks of Amadori compound.


Anspruch[de]
Ein Verfahren zum Messen einer Amadori-Verbindung durch Bestrahlen einer Probe, die die Amadori-Verbindung beinhaltet, mit Anregungslicht einer einzelnen Wellenlänge, Empfangen gestreuten Lichts von der Probe und Trennen des gestreuten Lichts in seine Spektralkomponenten zum Erhalten eines Lichtstreuspektrums, dadurch gekennzeichnet, dass eine quantitative Messung der Amadori-Verbindung durch eine von Lichtstreuspitzen, die bei 820 - 840 cm-1, 1.655 - 1. 660 cm-1, 2.000 - 2.020 cm-1, 2.080 - 2.100 cm-1, 2.460 - 2.470 cm-1 oder 2.530 - 2.600 cm-1 angegeben in einer Versatzwellenzahl in Bezug auf die Anregungswellenlänge in dem Lichtstreuspektrum vorliegen, durchgeführt wird, wobei die quantitative Messung den Schritt eines Durchführens einer Verzuckerungsverhältnismessung der Amadori-Verbindung auf der Basis des Verhältnis I/S einer Spitzenintensität oder eines Integralwerts I der einen von Lichtstreuspitzen zu einem Integralwert S eines fluoreszenzspektrums einer willkürlich gesetzten Wellenzahlregion in dem Lichtstreuspektrum aufweist. Das Verfahren zum Messen einer Amadori-Verbindung gemäß Anspruch 1, bei dem eine arithmetische Operation eines Entfernens eines Fluoreszenzspektrumteils aus dem Lichtstreuspektrum durchgeführt wird und danach die quantitative Messung der Amadori-Verbindung auf der Basis der Spitzenintensität oder des Integralwerts der einen von Lichtstreuspitzen durchgeführt wird. Das Verfahren zum Messen einer Amadori-Verbindung gemäß Anspruch 1, bei dem eine Konzentration oder ein Verzuckerungsverhältnis der Amadori-Verbindung, die/das auf der Basis der Spitzenintensität oder des Integralwerts der einen von Lichtstreuspitzen erhalten wird, durch einen Integralwert einer willkürlich gesetzten Wellenzahlregion in dem Lichtstreuspektrum korrigiert wird. Das Verfahren zum Messen einer Amadori-Verbindung gemäß einem der Ansprüche 1 bis 3, bei dem

der Integralwert S des Fluoreszenzspektrums derjenige in einer willkürlich gesetzten Wellenzahlregion ausschließlich aller von 820 - 840 cm-1, 1.655 - 1.660 cm-1, 2.000 - 2.020 cm-1, 2.080 - 2.100 cm-1, 2.460 - 2.470 cm-1 und 2.530 - 2.600 cm-1 angegeben in einer Versatzwellenzahl in Bezug auf die Anregungswellenlänge in dem Lichtstreuspektrum ist.
Das Verfahren zum Messen einer Amadori-Verbindung gemäß Anspruch 1, bei dem

die gemessene Amadori-Verbindung verzuckertes Albumin, verzuckertes Hämoglobin oder Fructosamin ist.
Das Verfahren zum Messen einer Amadori-Verbindung gemäß Anspruch 1, bei dem

eine He-Ne-Lasereinheit als eine Anregungslichtquelle eingesetzt wird.
Anspruch[en]
A method of measuring an Amadori compound by irradiating a sample containing said Amadori compound with excitation light of a single wavelength, receiving scattered light from said sample and separating said scattered light into its spectral components for obtaining a light scattering spectrum, characterized in that a quantitative measurement of said Amadori compound is performed through one of light scattering peaks existing at 820 to 840 cm-1, 1655 to 1660 cm-1, 2000 to 2020 cm-1, 2080 to 2100 cm-1, 2460 to 2970 cm-1 or 2530 to 2600 cm-1 in shift wavenumber with respect to said excitation wavelength in said light scattering spectrum, the quantitative measurement comprising the step of performing a saccharification ratio measurement of said Amadori compound on the basis of the ratio I/S of a peak intensity or an integral value I of said one of light scattering peaks to an integral value S of a fluorescence spectrum of an arbitrarily set wavenumber region in said light scattering spectrum. The method of measuring an Amadori compound in accordance with claim 1, wherein an arithmetic operation of removing a fluorescence spectrum part from said light scattering spectrum is performed and thereafter said quantitative measurement of said Amadori compound is performed on the basis of said peak intensity or said integral value of said one of light scattering peaks. The method of measuring an Amadori compound in accordance with claim 1, wherein

a concentration or a saccharification ratio of said Amadori compound being obtained on the basis of said peak intensity or said integral value of said one of light scattering peaks is corrected by an integral value of an arbitrarily set wavenumber region in said light scattering spectrum.
The method of measuring an Amadori compound in accordance with any one of claims 1 to 3, wherein

said integral value S of said fluorescence spectrum is that in an arbitrarily set wavenumber region excluding all of 820 to 840 cm-1, 1655 to 1660 cm-1, 2000 to 2020 cm-1, 2080 to 2100 cm-1, 2460 to 2470 cm-1 and 2530 to 2600 cm-1 in shift wavenumber with respect to said excitation wavelength in said light scattering spectrum.
The method of measuring an Amadori compound in accordance with claim 1, wherein

said measured Amadori compound is any one of saccharified albumin, saccharified hemoglobin and fructosamine.
The method of measuring an Amadori compound in accordance with claim 1, wherein

an He-Ne laser unit is employed as an excitation light source.
Anspruch[fr]
Procédé de mesure d'un composé d'Amadori par irradiation d'un échantillon contenant ledit composé d'Amadori par de la lumière d'excitation d'une seule longueur d'onde, réception de la lumière dispersée dudit échantillon et séparation de ladite lumière dispersée en ses composantes spectrales, pour obtenir un spectre de dispersion de lumière, caractérisé par le fait qu'une mesure quantitative dudit composé d'Amadori est effectuée à travers l'une des crêtes de dispersion de lumière existant à un nombre d'onde de décalage de 820 à 840 cm-1, de 1655 à 1660 cm-1, de 2000 à 2020 cm-1, de 2080 à 2100 cm-1, de 2460 à 2470 cm-1 ou de 2530 à 2600 cm-1 par rapport à ladite longueur d'onde d'excitation dans ledit spectre de dispersion de lumière, la mesure quantitatif comprenant l'étape consistant à effectuer une mesure du taux de saccharification dudit composé d'Amadori sur base du rapport I/S entre une intensité de pointe ou une valeur intégrale 1 de ladite une des pointes de dispersion de lumière et une valeur intégrale S d'un spectre de fluorescence d'une région de nombre d'onde fixée arbitrairement dans ledit spectre de dispersion de lumière. Procédé de mesure d'un composé d'Amadori selon la revendication 1, dans lequel est effectuée une opération arithmétique pour éliminer une partie de spectre de fluorescence dudit spectre de dispersion de lumière et ensuite est effectuée ladite mesure quantitative dudit composant d'Amadori sur base de ladite intensité de pointe ou de ladite valeur intégrale de ladite une des crêtes de dispersion de lumière. Procédé de mesure d'un composé d'Amadori selon la revendication 1, dans lequel

une concentration ou un taux de saccharification dudit composé d'Amadori obtenu sur base de ladite intensité de pointe ou de ladite valeur intégrale de ladite une des crêtes de dispersion de lumière est corrigé par une valeur intégrale d'une région de nombre d'onde fixée arbitrairement dans ledit spectre de dispersion de lumière.
Procédé de mesure d'un composé d'Amadori selon l'une quelconque des revendications 1 à 3, dans lequel

ladite valeur intégrale S dudit spectre de fluorescence est celle dans une région de nombre d'onde fixée arbitrairement à l'exclusion de toutes les régions de nombre d'onde de décalage de 820 à 840 cm-1, de 1655 à 1660 cm-1, de 2000 à 2020 cm-1, de 2080 à 2100 cm-1, de 2460 à 2470 cm-1 et de 2530 à 2600 cm-1 par rapport à ladite longueur d'onde d'excitation dans ledit spectre de dispersion de lumière.
Procédé de mesure d'un composé d'Amadori selon la revendication 1, dans lequel

ledit composé d'Amadori mesuré est l'une ou l'autre parmi albumine saccharifiée, hémoglobine saccharifiée et fructosamine.
Procédé de mesure d'un composé d'Amadori selon la revendication 1, dans lequel

une unité de laser He-Ne est utilisée comme source de lumière d'excitation.






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