Fourier infrared spectrometer and sample gas absorption cell

A sample gas and infrared spectrum technology, which is applied in the field of sample gas absorption cells, can solve the problems of inability to complete measurement tasks and rising measurement costs, and achieve the effects of increasing the detection limit of concentration signals, improving sensitivity, and increasing optical path length

Active Publication Date: 2013-09-04
NANJING SHUNTAI TECH
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Problems solved by technology

This will lead to an increase in the cost of measurement, and i

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  • Fourier infrared spectrometer and sample gas absorption cell
  • Fourier infrared spectrometer and sample gas absorption cell
  • Fourier infrared spectrometer and sample gas absorption cell

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Embodiment Construction

[0024] figure 1 It is a schematic diagram of the composition principle of a Fourier transform infrared spectrometer according to an embodiment of the present invention. Such as figure 1 As shown, an infrared light beam 101 emitted by an infrared light source passes through a sample gas absorption cell 103 . According to an embodiment of the present invention, the infrared light beam 101 emitted by the infrared light source passes through the sample gas absorption cell 103 after being collimated. The sample gas absorption cell 103 is provided with a sample gas inlet 102 for sample gas entry and a sample gas outlet 104 for sample gas discharge. When the sample gas enters the sample gas absorption cell 103 from the sample gas inlet 102 , the infrared beam passes through the sample gas entering the sample gas absorption cell 103 . The sample gas exits the sample gas absorption cell 103 through the sample gas outlet 104 . The infrared beam 101 is incident on the first parabolic...

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Abstract

The invention discloses a Fourier infrared spectrum detection device. The Fourier infrared spectrum detection device comprises a sample gas absorption cell for absorbing sample gas, an interferometer for generating an interference optical signal for the light beam which passes through the sample gas in the sample gas absorption cell, a photoelectric detector for converting the interference optical signal into a voltage signal, and a control computer for performing Fourier transform on the voltage signal to convert the interference pattern into a spectrum chart, wherein the computer is controlled to solve the concentration information of the sample gas by inversion calculation, and optical adjustment lenses are arranged in the sample gas absorption cell so as to increase the optical distance. According to the Fourier infrared spectrum detection device, the optical adjustment lenses are additionally arranged in the sample gas absorption cell so as to change the light beam propagation path and increase the length of optical distance, and sequentially, the lower detection limit of the signal concentration is increased.

Description

[0001] technical field [0002] The invention relates to infrared spectroscopy technology, in particular to a Fourier infrared spectrometer and a sample gas absorption cell for the Fourier infrared spectrometer. [0003] Background technique [0004] Infrared spectroscopy belongs to molecular vibration spectroscopy. By analyzing the spectrum of molecular vibration, the information of molecular structure can be obtained. Compared with other analytical instruments, infrared spectroscopy can detect any gaseous, liquid and solid samples, while other analytical instruments are limited in this regard. Especially for organic compounds, because each compound has infrared absorption, especially the infrared spectrum of organic compounds can provide rich structural information, so especially for organic compounds, infrared spectroscopy is a very important structure detection and analysis equipment. As a useful means of detecting and analyzing the structure of substances, infrare...

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Application Information

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IPC IPC(8): G01N21/35G01N21/01
Inventor 张玉钧张立强蔡毅敏王立明
Owner NANJING SHUNTAI TECH
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