Soil VOCs detection device based on surface acoustic waves
A surface acoustic wave and detection device technology, applied in the direction of using sonic/ultrasonic/infrasonic waves to analyze fluids, analytical materials, instruments, etc., can solve problems such as inability to achieve quantitative detection, reduction in detection accuracy, and loss of VOCs gas.
Active Publication Date: 2021-04-09
合肥科博慧科技管理有限责任公司
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However, this detection needs to collect the VOCs gas and bring it to the ground through the carrier gas, which will cause the loss of the VOCs gas during the transportation process, resulting in a greatly reduced detection accuracy. Therefore, this detection can only perform qualitative detection of VOCs, but cannot achieve quantitative detection. detection
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[0027] Such as Figures 1 to 3 as shown, figure 1 A schematic structural view of a soil VOCs detection device based on surface acoustic waves proposed by the present invention, figure 2 It is a schematic diagram of the detection cavity layout of another embodiment of a surface acoustic wave-based soil VOCs detection device proposed by the present invention, image 3 It is a schematic diagram of the arrangement of detection chambers of another embodiment of a surface acoustic wave-based soil VOCs detection device proposed by the present invention.
[0028] refer to figure 1 , a kind of soil VOCs detection device based on surface acoustic wave that the present invention proposes, comprises: detection drill bit 1, surface acoustic wave sensor;
[0029] The detection drill 1 is provided with a first heating mechanism, and the detection drill 1 is provided with a detection cavity 3, the side wall of the detection cavity 3 is provided with a gas inlet, and the detection cavity 3...
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The invention discloses a soil VOCs detection device based on surface acoustic waves, a first heating mechanism is arranged on a detection drill bit, a detection cavity is formed in the detection drill bit, a gas inlet is formed in the side wall of the detection cavity, and a detection semipermeable membrane is arranged in the detection cavity; and a surface acoustic wave sensor is used for detecting VOCs gas entering the detection cavity by detecting the surface acoustic wave of the detection semipermeable membrane. According to the optimally designed soil VOCs detection device based on the acoustic surface wave, the acoustic surface wave sensor is used for detecting the acoustic surface wave when the detection semipermeable membrane is in contact with the VOCs gas by utilizing the selective dissolution and permeation of the detection semipermeable membrane to the VOCs gas, so that the detection of the VOCs gas is realized, the in-situ quantitative detection of the VOCs gas in the soil is realized, and the detection accuracy and sensitivity are improved.
Description
technical field [0001] The invention relates to the technical field of soil VOCs detection, in particular to a soil VOCs detection device based on surface acoustic waves. Background technique [0002] Pollutants in the land include not only heavy metals such as mercury, chromium, lead, cadmium, arsenic, nickel, but also organic substances such as benzene series, chlorinated hydrocarbons, petroleum hydrocarbons, polycyclic aromatic hydrocarbons, pesticides, polychlorinated biphenyls, and Inorganic substances such as cyanide and corrosive ions. The raw materials, intermediate products, catalysts or final products in the production process may pollute the land. Affected by long-term industrial activities, land pollution is mostly characterized by combined organic and inorganic pollution. [0003] Common volatile organic pollutants that are harmful to human health include volatile halogenated hydrocarbons, benzene series, and chlorinated benzenes. Therefore, the detection of ...
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IPC IPC(8): G01N29/02
CPCG01N29/02G01N2291/021Y02A50/20
Inventor 袁林杨俊光
Owner 合肥科博慧科技管理有限责任公司