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A device detecting NO through chemiluminescence and a detecting method thereof

A chemiluminescence method, chemiluminescence technology, applied in the direction of chemiluminescence/bioluminescence, measurement device, test sample preparation, etc., can solve problems affecting NO measurement, achieve stable NO response value, accurate detection, gas detection tube road stabilization effect

Inactive Publication Date: 2016-10-26
SUZHOU JIANGHAI COMM DEV IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the study found that when there are other gases that can react with ozone in the environment, it will affect the measurement of NO. Therefore, it is necessary to explore methods to eliminate the interference of impurity gases on NO detection.

Method used

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  • A device detecting NO through chemiluminescence and a detecting method thereof
  • A device detecting NO through chemiluminescence and a detecting method thereof
  • A device detecting NO through chemiluminescence and a detecting method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1. The interference of other gases volatilized from polymer airbags on NO detection

[0045] The nitrogen oxide chemiluminescence analyzer was used as the detector to detect the ambient air and the air filled into the airbag respectively. It was found that the detected value of NO after the air was filled into the airbag made of polyethylene or polyvinyl chloride was much higher than the concentration of NO in the air. , the experimental results are as figure 1 shown. From the experimental results, it can be concluded that other gases volatilized from the polymer airbag interfere with the detection of NO, that is, other gases interfere with the chemiluminescence detection of NO.

Embodiment 2

[0046] Example 2. Using NaA molecular sieve membrane to eliminate impurity gas interference and detect NO

[0047] 1) First use high-purity nitrogen to purge the ceramic tube sealing assembly loaded with NaA molecular sieve membrane for 1.5h to activate the NaA molecular sieve membrane. The membrane diameter of the NaA molecular sieve membrane is 0.3nm;

[0048] 2) Then build the pipeline system, and add the activated NaA molecular sieve membrane into the pipeline system, the temperature and relative humidity of the test environment are respectively 25°C and 60%, and the constant temperature and humidity conditions are maintained;

[0049] 3) Open the gas production system and the mass flow control branch, and at the same time close the gas source branch to be detected, adjust the gas production system, and control the gas flow rate of the pipeline system by controlling the mass flow control branch to 700mL / min. The gas in the gas production system is passed into the pipeline ...

Embodiment 3

[0052] Example 3. Utilize hydrophilic modified molecular sieve to eliminate impurities and detect NO

[0053] 1) First activate the hydrophilic modified zeolite molecular sieve in an electric heating constant temperature blast drying oven at a temperature of 100°C for 5 hours;

[0054] 2) Then build a pipeline system, and add 110g of activated hydrophilic modified zeolite molecular sieve into the pipeline system. The temperature and relative humidity of the test environment are respectively 20°C and 80%, and constant temperature and humidity conditions are maintained;

[0055] 3) Open the gas production system and the mass flow control branch, and at the same time close the gas source branch to be detected, adjust the gas production system, and control the gas flow of the pipeline system by controlling the mass flow control branch to 900mL / min. The gas in the gas production system is passed into the pipeline system, the pipeline is purged for 10 minutes, and the nitrogen oxide...

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Abstract

A device detecting NO through chemiluminescence and a detecting method thereof are disclosed. The device comprises a gas generating system and a nitrogen oxide chemiluminescence analyzer, and also comprises a sealing component for accommodating an impurity adsorber, a mass flux control branch and a branch of a gas source to be detected. The gas generating system is separately connected to the mass flux control branch and the branch of the gas source to be detected. One end of the sealing component is separately connected to the mass flux control branch and the branch of the gas source to be detected, and the other end of the sealing component is connected to the nitrogen oxide chemiluminescence analyzer. The method detects through the device. The method can effectively eliminate impurity interferences through impurity adsorber treatment under specific conditions so that NO detection is more accurate.

Description

technical field [0001] The invention relates to a NO detection device and a detection method thereof, in particular to a chemiluminescent NO detection device and a detection method thereof. Background technique [0002] NO is a new type of intracellular messenger molecule, which can easily pass through the cell membrane and has strong diffusivity, covering almost all parts of the body. At the same time, it is also an active component in the human body's exhaled air, which is closely related to biological activities. The living conditions of people in the environment can be accurately judged by measuring the NO content. Therefore, accurate determination of NO in biological systems has become a necessary means to further explore the function of NO. However, it is very difficult to realize accurate and real-time detection of NO, because the concentration of NO in biological samples is low, and it is a kind of active fat-soluble small molecule gas, which has the characteristics...

Claims

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Application Information

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IPC IPC(8): G01N21/76G01N1/34
CPCG01N21/766G01N1/34
Inventor 张黎王晨曦查星宋玉祥唐奈朱海军孙素坤
Owner SUZHOU JIANGHAI COMM DEV IND
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