Sampler free from matrix interference

A sampler and matrix-free technology, which is applied in the field of environmental engineering, can solve the problems of toxicity effects, small size, toxicity and toxicological research interference, etc., and achieve the effect of ensuring sampling efficiency, reducing matrix interference, and promoting toxicity and toxicological research

Pending Publication Date: 2019-01-08
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MOUDIMMI, Andersen eight-stage impact sampler, and Sioutas Cascade Impactor (SKC), which are more commonly used in the world, have a flow rate of only 9L / min-90L / min and a small volume, which is far from meeting the sample volume required for particle toxicity analysis.
The large flow samplers commonly used in the study of atmospheric particulates, such as Tisch Environmental, ThermoScientific, and Digitel, can collect particulates at the same time, but the particulate carriers they collect basically use quartz or glass as the filter membrane, and some studies have shown that These materials themselves have a great toxic effect, which brings great matrix interference to the research of toxicity and toxicology of atmospheric particulate matter.

Method used

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  • Sampler free from matrix interference

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Experimental program
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Effect test

Embodiment 1

[0016] Such as figure 1 As shown, the matrix-free sampler of this embodiment includes a VOC adsorption tube 1, a PM cutting head 2, an ultrasonic atomization device 3, a first-stage sample collection device 4, a second-stage sample collection device 5, an air pump 6, The control system 7 and the filter screen 8; the VOC adsorption tube 1, the PM cutting head 2, the first-stage sample collection device 4, the second-stage sample collection device 5 and the air pump 6 are connected in sequence through pipelines, and the ultrasonic atomization device 3 is set On the connecting pipeline between the PM cutting head 2 and the first-stage sample collection device 4, a filter screen 8 is also provided in the pipeline between the second-stage sample collection device and the air pump, and a filter screen 8 is arranged in the second-stage sample collection device. Condenser 9 is provided. A control system 7 is also provided, and the control system 7 is connected to the air pump 6 in si...

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Abstract

The invention discloses a sampler free from matrix interference. The sampler comprises a VOC adsorption tube, a PM cutting head, an ultrasonic atomizing device, a first-stage sample collection device,a second-stage sample collection device and an air pump; the VOC adsorption tube, the PM cutting head, the first-stage sample collection device, the second-stage sample collection device and the airpump are sequentially connected by a pipeline, the ultrasonic atomizing device is arranged on the connecting pipeline between the PM cutting head and the first-stage sample collection device or on thetop wall of the first-stage sample collection device, and a condensing device is arranged in the second-stage collection device. Filter membranes made of quartz, glass or the like are not used for collection, and such materials have great toxic effects, which brings great matrix interference to the researches on toxicity and toxicology of atmospheric particulate matters, so that the sampler freefrom matrix interference reduces the matrix interference and can ensure the sampling efficiency.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to a matrix-free sampler. Background technique [0002] Air pollution seriously affects human health and has become one of the main environmental problems facing our country. Atmospheric particulate matter is an important component of aerosols and an important pollutant that causes local and regional haze and affects human health. Inhalable particulate matter (PM) in atmospheric aerosols 2.5 ) refers to particles with an aerodynamic diameter of less than 2.5 μm, which has a small particle size and a large surface, and is very easy to absorb a large amount of toxic and harmful substances and strong carcinogens, and has a long residence time in the atmosphere and a long transportation distance. Carbonaceous particles account for 10% to 50% of the composition of atmospheric particulate matter, and contain harmful substances such as phthalates and polybas...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01N1/22
CPCG01N1/2205G01N1/2214
Inventor张向云李军张干
OwnerGUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI