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Pressure ring device for directly measuring filter membrane loaded atmospheric particles through total reflection X-ray fluorescence spectroscopy

A technology of atmospheric particles and photofluorescence, which is applied in the fields of chemical analysis and environmental monitoring, can solve problems such as inability to perform TXRF analysis, unevenness, easy curling and deformation, etc., to save digestion and transfer time, improve efficiency, reduce work intensity and Analyze cost effects

Pending Publication Date: 2018-10-26
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The filter membrane is relatively soft, and it is easy to curl and deform when placed on the sample stand. It is not flat and cannot be used for TXRF analysis.

Method used

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  • Pressure ring device for directly measuring filter membrane loaded atmospheric particles through total reflection X-ray fluorescence spectroscopy
  • Pressure ring device for directly measuring filter membrane loaded atmospheric particles through total reflection X-ray fluorescence spectroscopy
  • Pressure ring device for directly measuring filter membrane loaded atmospheric particles through total reflection X-ray fluorescence spectroscopy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 As shown, the present invention provides a pressure ring device that keeps the atmospheric filter membrane flat so as to directly measure the atmospheric particles carried by the filter membrane with a total reflection X-ray fluorescence spectrometer. It includes a pressure ring component 1, a sample tray 2 and a sample rack 3; the surface of the sample tray 3 is higher than the sample rack 2; the pressure ring component 1 is attracted by the magnet block on the sample rack 3 to make the measurement The filter membrane 5 is tightened on the surface of the sample tray 2. The pressure ring component 1 is a steel pressure ring, and the sample holder is provided with a magnet block capable of attracting the steel pressure ring so that the steel pressure ring presses the filter membrane to be measured on the sample holder 4. There are multiple magnet blocks with moderate magnetic force, and they are evenly arranged on the sample holder 3. The sample holder ...

Embodiment 2

[0035] The basic idea of ​​this embodiment is the same as that of embodiment 1. The difference lies in the location of the magnet. In this embodiment, the pressing ring part is made of a material with uniform magnetic properties, which can attract the sample holder to make the pressing ring part The filter membrane to be measured is pressed on the sample holder; at least part of the sample holder is an iron material that can be matched with the ferromagnetic substance of the pressing ring component.

experiment example

[0037] Using the TXRF analysis technology supported by the technical solution of this patent application and the current most accurate ICP-MS analysis technology, the same batch of samples collected in Beijing at the same time period were tested and compared with the pollution source analysis of the same batch of samples collected by the PTEE sampling membrane. See the analysis results figure 2 , The left column in the figure is the result of detection using the TXRF of the compression ring device of the present invention, and the right column is the result of detection by the monitoring center using ICP-MS analysis technology. figure 2 The data in the data show that the results of the pollution source item analysis using the data obtained by the TXRF analysis method supported by this patented technology are almost the same as the results obtained using the accurate ICP-MS analysis method, and the detection time is from the ICP-MS analysis pre-processing to eliminate the atmos...

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Abstract

The invention relates to a pressure ring device for directly measuring filter membrane loaded atmospheric particles through total reflection X-ray fluorescence spectroscopy. The pressure ring device comprises a pressure ring component, a sample disc and a sample rack, wherein the surface of the sample disc is higher than the sample rack; and the pressure ring component and the sample rack are matched, so that a to-be-measured filter membrane is tightened on the surface of the sample disc. The pressure ring device disclosed by the invention has the beneficial effects that the surface of the filter membrane can be rapidly flattened, and X-ray total reflection is realized, so the elementary composition of the filter membrane loaded atmospheric particles can be directly and rapidly analyzed byusing a TXRF (Total-reflection X Ray Fluorescence) technology, the analysis time is shortened from three hours needed by previous transfer membrane sample preparation analysis to 10 minutes, the efficiency is greatly improved, and the working strength and analysis cost can be reduced. Moreover, since sample preparation and analysis are non-destructive, precious filter membrane loaded atmosphericparticles can be preserved.

Description

Technical field [0001] The invention relates to the field of chemical analysis and environmental monitoring, and in particular to a pressure ring device that keeps an atmospheric filter membrane flat so that the total reflection X-ray fluorescence spectrometer (TXRF) can directly measure the element composition of atmospheric particles carried by the filter membrane. Background technique [0002] At present, the air quality of 30% of key environmental protection cities and 17% of prefecture-level cities in my country does not meet the national secondary standards. Atmospheric particulate matter represented by PM2.5 has become one of the biggest factors threatening the lives and health of Chinese people. In addition to measuring the content of particulate matter in the atmosphere, it is also necessary to quickly analyze the elemental composition of atmospheric particulate matter carried by the air filter in order to determine the potential toxicity of atmospheric particulates and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/223
CPCG01N23/223
Inventor 崔大庆郑维明康海英
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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