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A method for standardising a spectrometer

A spectrometer and infrared spectrometer technology, used in the field of calibrating infrared spectrometers, can solve problems such as degradation, breakage or loss

Inactive Publication Date: 2007-12-05
FOSS ANALYTICAL AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The obvious disadvantage is that they require regular introduction of reference samples for spectrometer calibration in terms of working time and precision of established methods for calibration or correction
Reference samples may be degraded, broken or lost, in these cases the spectrometer should only be calibrated after obtaining a new sample

Method used

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  • A method for standardising a spectrometer
  • A method for standardising a spectrometer
  • A method for standardising a spectrometer

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Embodiment Construction

[0081] Illustrative embodiments and exemplary applications are now described to disclose the beneficial teachings of the present invention by referring to the accompanying drawings.

[0082] While the invention is described herein with reference to illustrative embodiments for particular applications, it should be understood that the invention is not limited thereto. Those of ordinary skill in the art, having access to the teachings provided herein, will appreciate other modifications, applications, implementations within the scope and other fields in which the present invention may find significant application.

[0083] Naturally, optical spectra can be generated from almost any type of sample, such as gaseous samples, solid samples such as cheese, grain or meat, or liquid samples such as milk or dairy products. In general, optical spectroscopy is often used for characterization, ie for determination of concentrations of ingredients in various items such as dairy products, as...

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Abstract

The invention provides a method for standardising an infrared spectrometer based on spectral patterns of constituents of atmospheric air naturally occurring in the spectrometer. The invention also provides a spectrometer applying the method. The method selects a spectral pattern in a recorded spectrum and determines a wavelength dependent position value for a feature, such as the centre of the pattern. This value is compared to a reference value that may be obtained from a spectrum recorded by a master instrument, and a standardisation formula can be determined. The absorption peaks from CO2 (g)around 2350 cm<-1> are preferred as the selected pattern. The method renders the use of reference samples unnecessary and allows for the standardisation to be performed simultaneously with the recording of a spectrum of a sample of interest.

Description

technical field [0001] The present invention relates to a method of calibrating an infrared spectrometer, and to an infrared spectrometer and components thereof operable according to the method. Background technique [0002] In a conventional (dispersive) spectrometer used to generate an optical spectrum from a sample, there are light emitters and light detectors that frame the light path into which the sample is placed in order for the sample in question to interact with the light . Such spectrometers typically also include means for holding the sample, such as a sample cell for holding the liquid sample, the material of which also interacts with light. Furthermore, mirrors, prisms, gratings, lenses etc. may also be introduced in the optical path in order to deflect the light. [0003] Optical spectra are generally absorption, transmission or reflection spectra. But emission spectra such as fluorescence spectroscopy or Raman spectroscopy are also used. [0004] The stat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/453G01J3/28
CPCG01N21/276G01N21/274G01N2201/127G01J3/4535G01N2021/3595G01N21/359G01J3/28
Inventor H·V·朱尔
Owner FOSS ANALYTICAL AS
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