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Method and device for measuring water content in hydrogen fluoride by utilizing Fourier transform infrared spectroscopy

A Fourier transform and infrared spectroscopy technology, applied in the field of hydrogen fluoride detection, can solve problems such as data errors, and achieve the effect of simple operation and high sensitivity

Active Publication Date: 2020-10-30
PERIC SPECIAL GASES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing Fourier transform infrared spectrometer has only one gas cell when detecting gas, but it often needs to detect multiple different gases during detection, and using the same gas cell will easily lead to data errors

Method used

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  • Method and device for measuring water content in hydrogen fluoride by utilizing Fourier transform infrared spectroscopy
  • Method and device for measuring water content in hydrogen fluoride by utilizing Fourier transform infrared spectroscopy
  • Method and device for measuring water content in hydrogen fluoride by utilizing Fourier transform infrared spectroscopy

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Step 1, turn on the Fourier transform infrared spectrometer, add an appropriate amount of liquid nitrogen to the instrument, the instrument is stable for more than half an hour, and set the following parameters: acquisition time 32s, scan times 32 times, resolution 4cm -1 , analysis range 400-4400cm -1 . Connect 99.999% high-purity helium gas cylinders, hydrogen fluoride standard gas cylinders containing water with different concentrations, and hydrogen fluoride sample cylinders to be tested to the Fourier transform infrared spectrometer. Open the 99.999% helium cylinder, and perform vacuum-helium replacement on the entire analysis pipeline. The purpose is to remove impurities in the pipeline, replace 5 times, vacuumize to a pressure of -0.1Mpa, carry out background collection, and Save the background spectrum.

[0053] Step 2, carry out high-purity helium-vacuum replacement to the pipeline between the Fourier transform infrared spectrometer and the hydrogen fluoride ...

Embodiment 2

[0059] The steps used are the same as in Example 1. The difference is that in step 2, the characteristic peak of water is selected as: 1488cm -1 . After detection and calculation, the analysis results are shown in Table 1.

Embodiment 3

[0061] The steps used are the same as in Example 1. The difference is that in step 2, the characteristic peak of water is selected as: 1868cm -1 . After detection and calculation, the analysis results are shown in Table 1.

[0062] The content of water in table 1 hydrogen fluoride

[0063]

[0064] It can be seen from Table 1 that these characteristic peaks can accurately determine the water content in hydrogen fluoride.

[0065] In order to realize simultaneous sampling of multiple standard samples and improve detection efficiency, the present invention also provides a Fourier transform infrared spectrum detection device, such as Figure 4 As shown, it includes a Fourier transform infrared spectrometer body 1, a detection chamber 2 is arranged in the Fourier transform infrared spectrometer body 1, and two support plates 5 are fixed on the bottom of the Fourier transform infrared spectrometer body 1, and a fixing plate is fixed between the two support plates 5. Plate 6,...

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Abstract

The invention provides a method and device for measuring water content in hydrogen fluoride by utilizing Fourier transform infrared spectroscopy, which can overcome the defects of a Karl Fischer method and a conductivity analysis method and meet the requirements of efficient, rapid and automatic analysis in industrial production. The infrared spectrum of hydrogen fluoride samples can be scanned rapidly; the operation is simple and the sensitivity is high; defects of the Karl Fischer method and the conductivity analysis method are overcome effectively, and accurate determination of the water content in hydrogen fluoride is realized. The device disclosed by the invention can be used for simultaneously detecting different gas, and the Fourier transform infrared spectrum of the device can be used for more accurately obtaining different gas detection data values.

Description

technical field [0001] The invention belongs to the technical field of hydrogen fluoride detection, and in particular relates to a method and a device for measuring water content in hydrogen fluoride by using Fourier transform infrared spectroscopy. Background technique [0002] In international standards, there are two main methods for the determination of water content in hydrogen fluoride: Karl Fischer method and conductivity analysis method. Regarding the Karl Fischer method, its measurement range is 0.1%-0.5%, while the water content of hydrogen fluoride products in my country is generally less than 0.05%, which is far below its accurate measurement range; secondly, the Karl Fischer method involves toxic Reagents have potential safety hazards; in addition, the method is complicated to operate. Therefore, the Karl Fischer method is not suitable for the determination of water content in hydrogen fluoride. At present, in the domestic standard "GB7746-2011 Industrial Anhyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3504G01N21/3554G01N21/01
CPCG01N21/3504G01N21/3554G01N21/01G01N2021/3595G01N2021/354G01N2021/0112
Inventor 倪珊珊郑秋艳孙秋丽林坤苏子杰袁瑞玲殷越玲孙江涛
Owner PERIC SPECIAL GASES CO LTD
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