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A detection system and method for chemical components of nanoparticles

A nanoparticle and detection system technology, which is applied in the fields of nanoparticle analysis, particle and sedimentation analysis, measuring devices, etc., can solve the problems of too many measurement system equipment, inability to accurately obtain chemical composition, complex operation and control, etc., to ensure safety Effect

Active Publication Date: 2020-11-13
INST OF CHEM CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The existing measurement system uses different devices for particle size screening and enrichment, resulting in a large number of equipment for the measurement system and complicated operation and control
At the same time, the existing technology mainly focuses on the measurement of organic chemical components of particulate matter, and cannot accurately obtain the chemical composition of inorganic components in particulate matter
[0004] In addition, the existing measurement systems usually measure particles with a particle size larger than 100nm, and cannot accurately obtain the chemical composition of particles with a particle size smaller than 50nm

Method used

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  • A detection system and method for chemical components of nanoparticles

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Embodiment 1

[0070] Turn on the first high-pressure gas source 1, the second high-pressure gas source 2, the first flow controller 6, and the second flow controller 7, and the gas enters the metal shell 9 as a protective gas to blow away the gas other than the particles that need to be collected. Enter the collection chamber 8 as sheath gas for separating single-size particles. Turn on the third flow controller 16 and the air pump 17 to control the air pressure in the collection chamber. Push the sampling rod 5 to a specific position, and the valve body 14 can be used to select to measure the external atmosphere or measure the known flow component particles generated by the particle generator 12 . The particles are charged by the charger 11 and enter the collection chamber. Turn on the voltage control power supply 4 to charge the metal shell, and at the same time, the first isolator 18 and the second isolator 19 ensure that it is not connected to the wall of the collection chamber and the...

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Abstract

The invention relates to a detection system and a detection method for nanoparticle chemical components, belongs to the technical field of environment monitoring, and solves the problems in the priorart that particle size sieving and nanoparticle enrichment adopt a separation system and an existing measurement system can not accurately obtain particle chemical components of which the particle size is smaller than 50nm. The detection system comprises an electric charge device, a particle size sieving-enrichment unit and a detection device, wherein the electric charge device, the particle sizesieving-enrichment unit and the detection device are connected in sequence; the particle size sieving-enrichment unit comprises a sampling rod, an enrichment part, a metal shell and a collection cavity; the metal shell is arranged in the collection cavity; one end of the sampling rod is arranged out of the collection cavity, and the other end is connected with the enrichment part and is arranged in the metal shell; and the metal shell and the enrichment part both have the opposite electric charges with the nanoparticle. The detection method comprises the following steps that: introducing the nanoparticle, sheath gas and protection gas, regulating voltage, switching to a heating mode, pushing the sampling rod to be near the detection device, and entering the detection device for detection.By use of the system and the method, single equipment can simultaneously screen and collect the nanoparticles of specific particle sizes.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring, in particular to a detection system and a detection method for chemical components of nanoparticles. Background technique [0002] At present, my country's atmospheric particulate matter pollution is becoming more and more serious, and the regional smog pollution caused by it has attracted widespread attention from all walks of life. Atmospheric particulate matter has an important impact on human health, atmospheric visibility, regional air pollution, and global climate change. The composition of particulate matter determines an important factor in its environmental effects. [0003] The existing measurement system uses different devices for particle size screening and enrichment, resulting in a large number of equipment for the measurement system and complicated operation and control. At the same time, the prior art mainly focuses on the measurement of organic chemical componen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/00
CPCG01N15/00G01N2015/0038
Inventor 王炜罡刘明元葛茂发彭超
Owner INST OF CHEM CHINESE ACAD OF SCI
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