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
CN101084419AInactive Publication Date: 2007-12-05FOSS ANALYTICAL AS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FOSS ANALYTICAL AS
Publication Date
2007-12-05
Estimated Expiration
Not applicable · inactive patent

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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.
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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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