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Light absorption tube and gas-phase molecular absorption spectrometer comprising same

A gas-phase molecule and spectrometer technology, applied in the field of gas-phase molecular absorption spectrometer, can solve the problems of large detection error, low absorbance, affecting the accuracy of detection results, etc., and achieve the effect of improving absorbance and ensuring accuracy

Pending Publication Date: 2019-01-11
SHANGHAI ANJIE ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing gas-phase molecular absorption spectrometer has the problem of low absorbance when analyzing water quality, which leads to large detection errors and affects the accuracy of the detection results.

Method used

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  • Light absorption tube and gas-phase molecular absorption spectrometer comprising same
  • Light absorption tube and gas-phase molecular absorption spectrometer comprising same
  • Light absorption tube and gas-phase molecular absorption spectrometer comprising same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A gas phase molecular absorption spectrometer, the spectrometer includes such as figure 1 As shown in the light-absorbing tube, the light-absorbing tube includes a light-absorbing tube body, the light-absorbing tube body includes two straight tube sections connected in series 1, a reflector 2 arranged between the two straight tube sections 1 and a mirror 2 arranged between the two straight tube sections 1 The connecting pipe 3 and the two straight pipe sections 1 are arranged perpendicular to each other. The two ends of the straight pipe section 1 are respectively provided with a light entrance end transparent window 4 and a light exit end transparent window 5, and the light absorption tube body is respectively provided with an air inlet 6 and an air outlet 7. The air inlet 6 and the air outlet 7 are both opened on the side of the light absorption tube body.

[0036] The spectrometer also includes a light source 8 and a detector 9 respectively adapted to the two ends of the...

Embodiment 2

[0040] Such as figure 2 A light absorbing tube is shown, the light absorbing tube includes a light absorbing tube body, the light absorbing tube body includes two straight tube sections connected in series 1, two reflectors 2 arranged between two adjacent straight tube sections 1 and two straight The connecting pipe 3 between the pipe sections 1, the two straight pipe sections 1 are arranged parallel to each other, the two ends of the straight pipe section 1 are respectively provided with a light entrance end transparent window 4 and a light exit end transparent window 5, and the light absorption tube body is respectively provided with an air inlet 6 And the outlet 7. The air inlet 6 and the air outlet 7 are both opened on the side of the light absorption tube body.

Embodiment 3

[0042] In this embodiment, the light-absorbing tube body includes three straight tube sections 1 connected in series, a reflector 2 arranged between two adjacent straight tube sections 1, and a connecting tube 3 arranged between two adjacent straight tube sections 1. The central axes of the two straight pipe sections 1 are not collinear. The two ends of the straight pipe section 1 are respectively provided with a light entrance end transparent window 4 and a light exit end transparent window 5, and the light absorption tube body is provided with an air inlet 6 and an air outlet 7 respectively. The air inlet 6 and the air outlet 7 are both opened on the side of the light absorption tube body.

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Abstract

The invention relates to a light absorption tube and a gas-phase molecular absorption spectrometer comprising the same. The light absorption tube includes a light absorption tube body. The light absorption tube body includes at least two straight tube sections mutually connected in series, a light reflector disposed between the two adjacent straight tube sections, and a communication tube disposedbetween the two adjacent straight tube sections. Central axes of the two adjacent straight tube sections are not collinear. Two ends of each straight tube section are respectively provided with a light entrance end transparent-window and a light exit end transparent-window. The light absorption tube body is respectively provided with an air inlet and an air outlet. Compared with the prior art, the light absorption tube can enable, through dividing the light absorption tube body into the plurality of straight tube sections mutually connected in series and disposing the light reflector betweenthe two adjacent straight tube sections, light beams, which enter the light absorption tube from a light source, to move along the inside of the light absorption tube body and reach a detector, realizes providing of longer optical path in limited spectrometer space, improves light absorbance obtained by measurement, and ensures accuracy of a detection result.

Description

Technical field [0001] The invention belongs to the technical field of environmental detection and chemical analysis, and relates to a light absorption tube and a gas phase molecular absorption spectrometer containing the light absorption tube. Background technique [0002] In the field of environmental testing and chemical analysis, gas phase molecular absorption spectroscopy (GPMAS) is a commonly used analytical method, which can be used to determine ammonia nitrogen, total nitrogen, sulfide, nitrate nitrogen, nitrite nitrogen, Kjeldahl nitrogen, etc. . The gas phase molecular absorption spectroscopy method is based on the principle that the light absorption intensity of the gas decomposed by the measured component and the concentration of the measured component comply with the principle of light absorption law for quantitative determination; in addition, according to the different absorption wavelength of the measured component , You can also determine the type of component t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/03
CPCG01N21/0303G01N21/31G01N2021/3125
Inventor 曾祥丽刘盼西郝俊陈刚刘丰奎刘剑萍刘忠强牛军王建孙璐
Owner SHANGHAI ANJIE ENVIRONMENTAL PROTECTION TECH