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Gas sample injection device containing ammonia and/or amine substances, detection device and detection method

A gas sample and sampling device technology, applied in the field of analysis and detection, can solve the problems of analysis and detection interference, slow speed, cumbersome operation, etc., and achieve the effect of avoiding interference and improving accuracy and accuracy

Pending Publication Date: 2020-11-06
INST OF ATMOSPHERIC PHYSICS CHINESE ACADEMY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are many unfavorable factors in the detection of substances to be tested in the atmosphere. First, particulate matter in the atmosphere often interferes with the analysis and detection of substances to be tested. Second, it is difficult to detect continuously on-line. Measure the concentration of the substance
Taking the analysis and detection of ammonia / amine as an example, the most widely used detection methods are gas chromatography, high performance liquid chromatography, and ion chromatography. However, these methods are cumbersome to operate, slow in speed, and lack efficient and simple methods to remove particulate matter. Interference, difficult to achieve online continuous detection

Method used

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  • Gas sample injection device containing ammonia and/or amine substances, detection device and detection method

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Experimental program
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Effect test

Embodiment 1

[0041] Embodiment 1 Gas sample sampling device

[0042] refer to figure 1, this embodiment proposes a gas sample sampling device, which can be used for the detection of ammonia / amine pollutants in the atmosphere, including a first sampling tube 10, a first outer tube 20, a first particle collection component 30, a power unit 40 and air extraction device 50.

[0043] The first sampling tube 10 is used for gas sample injection, at least a part of the first sampling tube 10 is arranged in the first outer sleeve 20, and the first sampling tube 10 has an air inlet 11 and a gas outlet 12 , the air outlet 12 is located in the first outer sleeve. The first sampling tube 10 is, for example, made of quartz glass, which can be integrally formed or composed of multiple parts. The first sampling tube 10 has one or more gas inlets 11 . When it has an air inlet 11, gas sample and standard sample all enter air from this inlet, when it has a plurality of air inlets (not shown in the figure...

Embodiment 2

[0068] Embodiment 2 gas sample detection device

[0069] This embodiment proposes a gas sample detection device for detecting ammonia / amines in the atmosphere, including the gas sample sampling device described in Example 1 and a proton transfer reaction mass spectrometer (PTR-MS) or proton transfer reaction Time-of-flight mass spectrometer, the proton transfer reaction mass spectrometer (PTR-MS) has a sampling device (not shown in the figure), such as an air pump, which provides flow power for gas samples and standard samples to enter the detection device. Atmospheric samples and standard samples alternately enter the proton transfer reaction mass spectrometer or proton transfer reaction time-of-flight mass spectrometer through the gas sample sampling device to detect the content of ammonia / amine substances in the atmosphere.

[0070] Further preferably, the pumping capacity of the pumping device is greater than that of the sampling device, that is, the power of the pumping d...

Embodiment 3

[0071] The detection method of ammonia / amine substances in the atmosphere of embodiment 3

[0072] This embodiment proposes a method for detecting ammonia / amine substances in the atmosphere using the gas sample detection device of Embodiment 2, comprising the following steps:

[0073] Access barriers;

[0074] Atmospheric samples and standard samples are fed alternately;

[0075] Proton transfer reaction mass spectrometry or proton transfer reaction time-of-flight mass spectrometry detects the amount of ammonia / amines in the atmosphere.

[0076] Preferably, the blocking agent is 1H,1H-perfluorooctylamine. After the test object barrier agent is heated and vaporized, the carrier gas output by the power unit is brought into the first outer sleeve, and after being cooled, it is adsorbed on the inner wall of the first outer sleeve, which can not only block the test object from the first outer sleeve In addition, because of its higher hydrophilicity than other ammonia / amine subst...

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Abstract

The invention relates to a gas sample injection device containing ammonia and / or amine substances, a detection device and a detection method. The gas sample injection device comprises a first sample injection pipe, a first outer sleeve, a first particle collection part and a gas extractor, wherein at least one part of the first sample injection pipe is arranged in the first outer sleeve, a gas flow channel is formed between the first outer sleeve and the first sample injection pipe, the first sample injection pipe is provided with a gas inlet and a gas outlet, and the gas outlet of the first sample injection pipe is located in the first outer sleeve; the first outer sleeve is provided with a gas inlet for introducing a to-be-detected object blocking agent, and a first gas outlet and a second gas outlet which are communicated with the gas extractor to suck in a gas sample and a standard sample; the first particle collection part is arranged at the first gas outlet, a gas outlet of the first sample injection pipe faces the first particle collection part, and the distance between the second gas outlet and the first particle collection part is larger than the distance between a gas outlet of the first sample injection pipe and the first particle collection part. The sample injection device can eliminate interference, so that the detection result is more accurate.

Description

technical field [0001] The invention belongs to the technical field of analysis and detection, and in particular relates to a gas sample sampling device containing ammonia and / or amine substances, a detection device and a detection method. Background technique [0002] Atmospheric ammonia (NH 3 ) play an extremely important role in the formation and growth of atmospheric particulate matter, and ammonia / amine pollutants are considered as PM 2.5 The important factor that the concentration level is continuously pushed up, ammonia / amine is PM 2.5 The root cause of the vast majority of secondary particle formation in the Amines are derivatives in which one or more hydrogen atoms in ammonia are replaced by hydrocarbon groups. According to different substituents, amines can be divided into aliphatic amines, alcohol amines, amides, aromatic amines, and heterocyclic amines. Ammonia / amines come from a wide range of sources, including natural sources, including oceans, forest fires,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06G01N1/24
CPCG01N1/24G01N15/0606
Inventor 吉东生徐小娟王跃思
Owner INST OF ATMOSPHERIC PHYSICS CHINESE ACADEMY SCI