Spectrum detection device of element components in haze and method of device

Abstract

The invention relates to device for conducting spectrum detection on element components in haze on spot with high sensitivity and high stability and a method of the device, and relates to the field ofatmosphere mass detection. According to the device, through a stepping motor which is automatically controlled, roll-type filter paper is driven, and then particulate matter in the haze is continuously collected online; by spraying enhancing powder and applying carrier gas, the LIBS signal strength is enhanced, and high detection sensitivity of a system is achieved; through colloid components andthe heating function of the enhancing powder, the attachment stability of the particulate matter is improved, and the quantitative detection precision of the system is achieved; by designing a collection area and a correction area on the roll-type filter paper at an interval, detection signals of the system are corrected on line, and finally, according to the data obtained through LIBS detectionand through correction, the final qualitative and quantitative analysis result of the element components in the haze is obtained. By means of the device, the types and contents of elements in the atmospheric suspended particulate matter can be subjected to rapid, continuous, multi-component and high-sensitivity detection, and the device is suitable for on-spot, online and high-precision atmospheremass analysis.

Description

technical field [0001] The invention relates to the technical field of laser spectrum analysis and the field of air quality detection, and is characterized in that the atomic emission spectrum analysis method is used to realize the rapid, continuous, multi-component and highly sensitive detection of element types and contents in atmospheric suspended particles, and is suitable for on-site, Online, high-precision air quality analysis. Background technique [0002] With the rapid development of industry and economy and the rapid increase of population, air pollution with smog as the main form has become one of the most important sources of pollution affecting human life. Smog is mainly composed of three items: sulfur dioxide, nitrogen oxides and inhalable particulate matter. Among them, inhalable particulate matter mainly includes PM2.5 and PM10, which refer to inhalable particulate matter with an aerodynamic equivalent diameter of less than or equal to 2.5 microns and 10 mic...

AI Technical Summary

Problems solved by technology

One is that there is no highly integrated LIBS device for fully automatic detection of haze components, so the collection and detection must be carried out step by step, which cannot meet the needs of on-site on-line applications; the other is that the particle samples collected by filter paper are not firmly attached, resulting in the shock wave effect generated by LIBS Third, the signal stability of LIBS detection is poor, which makes it difficult to meet the quantitative accuracy requirements of on-site detection in complex environments; fourth, the content of many elements in particulate matter samples is low, and the detection sensitivity of LIBS cannot meet the detection requirements

Images