EP0382908A2
Expired / Lapsed
EP
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Ir-spectrometric analysing procedure and means
Assignee: Anadis Instruments SA
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Filing: 1989-11-29
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Granted: —
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Expires: 2009-11-29
Abstract
Abstract An IR-spectrometric analysing procedure, the measuring absorbance and reference absorbance being detected simultaneously from an IR light beam conducted to pass through the sample and diffracted to a spectrum. An IR spectrometer comprising a light source (1), a sample cuvette (5), a diffraction member (6), detectors (7) and a calculating means (9) for determining the content values of the sample corresponding to the measuring absorbance, the detectors (7) having been arranged to detect the measuring absorbance and the reference absorbance simultaneously from the beam that has passed through the sample and been diffracted to a spectrum.
Inventors
- 👤 Jaakko Räsänen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 08:31
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/35; G01J; G01J3/00; G01J3/12; G01J3/18; G01J3/20; G01J3/28; G01J3/42; G01J3/427; G01N33/00; G01N33/02; G01N33/04; G01J3/30; G01J3/36; G01N21/3577
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
106 words
An IR-spectrometric analysing procedure for analysing the components of a dispersed system, such as emulsions or suspensions, wherein an IT light beam is produced; the IR light beam is conducted through a sample cuvette containing the sample; the IR light beam thus obtained is diffracted to a spectrum; the measuring absorbance and reference absorbance are detected at desired points in the spectrum and a quantitative analysis value is determined from the detected measuring and reference absorbances, characterized in that the measuring absorbance and reference absorbance are detected simultaneously from the IR light beam to be diffracted to a spectrum, which has been conducted through the sample.
Claim 2
Dependent Claim
106 words
An IR-spectrometric analysing procedure for analysing the components of a dispersed system, such as emulsions or suspensions, wherein an IT light beam is produced; the IR light beam is conducted through a sample cuvette containing the sample; the IR light beam thus obtained is diffracted to a spectrum; the measuring absorbance and reference absorbance are detected at desired points in the spectrum and a quantitative analysis value is determined from the detected measuring and reference absorbances, characterized in that the measuring absorbance and reference absorbance are detected simultaneously from the IR light beam to be diffracted to a spectrum, which has been conducted through the sample.
Claim 3
Dependent Claim
45 words
Procedure according to claim 1, characterized in that the IR beam is conducted from the sample to a diffraction member placed substantially on the periphery of a circle and the measuring absorbance and reference absorbance are detected at a peripheral point of the same circle.
Claim 4
Dependent Claim
26 words
Procedure according to claim 1, characterized in that the measuring absorbance and reference absorbance are detected in two mutually adjacent wavelength intervals of the IR spectrum.
Claim 5
Dependent Claim
32 words
Procedure according to claim 3, characterized in that the measuring absorbance is detected at a peak of the IR spectrum, and the reference absorbance at a minimum immediately adjacent to said peak.
Claim 6
Dependent Claim
21 words
Procedure according to claim 4, characterized in that the measuring absorbance and reference absorbance are detected with a different detector each.
Claim 7
Dependent Claim
20 words
Procedure according to claim 4, characterized in that the measuring absorbance and reference absorbance are detected with a dual detector.
Claim 8
Dependent Claim
23 words
Procedure according to claim 6, characterized in that the difference of the measuring and reference absorbances is formed in the dual beam detector.
Claim 9
Dependent Claim
25 words
Procedure according to claim 4, characterized in that the dispersed system to be measured is an emulsion selected from the group: fat and protein emulsions.
Claim 10
Dependent Claim
26 words
Procedure according to claim 8, characterized in that the dispersed system contains a substance selected from the group: carbohydrates, urea and other ketone substances, and antibiotics.
Claim 11
Dependent Claim
135 words
An IR spectrometer comprising an IR light source (1) for forming a light beam; a sample cuvette (5) which has been placed in the path of said beam; a diffraction member (6) for diffracting to a spectrum the light beam that has passed through the sample; detectors (7) for detecting the measuring absorbance at a desired point in the spectrum and for detecting the reference absorbance at another point of the spectrum, and a calculation means (9) for determining the content value of the sample corresponding to the measuring absorbance, on the basis of the detected measuring and reference absorbances, characterized in that the detectors (7) have been arranged to detect the measuring absorbance and reference absorbance simultaneously from the light beam that has passed through the sample and has been diffracted to a spectrum.
Claim 12
Dependent Claim
135 words
An IR spectrometer comprising an IR light source (1) for forming a light beam; a sample cuvette (5) which has been placed in the path of said beam; a diffraction member (6) for diffracting to a spectrum the light beam that has passed through the sample; detectors (7) for detecting the measuring absorbance at a desired point in the spectrum and for detecting the reference absorbance at another point of the spectrum, and a calculation means (9) for determining the content value of the sample corresponding to the measuring absorbance, on the basis of the detected measuring and reference absorbances, characterized in that the detectors (7) have been arranged to detect the measuring absorbance and reference absorbance simultaneously from the light beam that has passed through the sample and has been diffracted to a spectrum.
Claim 13
Dependent Claim
36 words
Means according to claim 10, characterized in that the diffraction member (6) has been placed substantially on a circular arc (10) and the detectors (7) have been placed substantially on an arc of the same circle.
Claim 14
Dependent Claim
33 words
Means according to claim 10, characterized in that the detectors (7) have been arranged to detect the measuring absorbance and the reference absorbance in two mutually adjacent wavelength intervals of the IR spectrum.
Claim 15
Dependent Claim
38 words
Means according to claim 12, characterized in that the detectors (7) have been arranged to detect the measuring absorbance at a peak in the IR spectrum and the reference absorbance, at a minimum immediately adjacent to said peak.
Claim 16
Dependent Claim
13 words
Means according to claim 12, characterized in that the detectors (7) are separate.
Claim 17
Dependent Claim
17 words
Means according to claim 12, characterized in that the detectors (7) constitute a dual beam detector (8¹).
Claim 18
Dependent Claim
28 words
Means according to claim 15, characterized in that the dual beam detector (8¹) has been arranged to form the difference of the measuring absorbance and the reference absorbance.
Claim 19
Dependent Claim
29 words
Means according to claim 13, characterized in that the light source (1), the diffraction member (6) and the detector (7) are mounted substantially fixedly in relation to each other.
References Cited (Backward Citations)
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