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Method, device and system for separating and extracting particulate matter from filter substrate

A separation device and technology for particulate matter, which are applied in separation methods, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problems of lack of specific implementation details of the washing method, inability to use organic solvents for washing, and large loss of particulate matter, and improve separation. efficiency and sufficiency, high degree of automation, and the effect of reducing residues

Active Publication Date: 2021-07-02
NORTHWEST INST OF NUCLEAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The invention provides a method for separating and extracting the particulate matter from the filter material substrate to solve the technical problem that the existing washing method lacks specific implementation details; at the same time, the invention also provides a method for separating the particulate matter from the filter material substrate The separation device, the separation and extraction device and the separation and extraction system are used to solve the technical problems of large particle loss, low separation efficiency and inability to use organic solvents for washing when the existing washing machine is used as the separation device for washing and separation

Method used

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  • Method, device and system for separating and extracting particulate matter from filter substrate
  • Method, device and system for separating and extracting particulate matter from filter substrate
  • Method, device and system for separating and extracting particulate matter from filter substrate

Examples

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Embodiment 1

[0094] Embodiment 1: the filter material sheet 9 after sampling in step 1 is 25 grams, adds 3 liters of water, adds surfactant 1.5 milliliters; The stirring speed of step 2 is 800 revolutions per minute, and the stirring time is 3 minutes; The rotating speed of step 3 The speed is 1600 revolutions per minute, and the dehydration time is 1 minute.

Embodiment 2

[0095] Embodiment 2: the filter material sheet 9 after sampling in step 1 is 40 grams, adds 3 liters of water, adds 3 milliliters of surfactants; The stirring speed of step 2 is 400 revolutions per minute, and the stirring time is 5 minutes; The rotating speed of step 3 1400 revolutions per minute, dehydration time is 1 minute.

[0096] After testing, the separation and extraction results of the above-mentioned embodiment 1 and embodiment 2 can all meet the requirement of fully separating and extracting the particulate matter from the filter material matrix.

[0097] When using the above separation device for separation, the dissolved sample of the turbid liquid flowing out from the valve 12 can also be used for the measurement and analysis of constant elements, compounds, and long-lived nuclides, or directly connect the turbid liquid to the separation column, which can be used for the separation of organic components. Enrichment.

[0098] The method, device and system for se...

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Abstract

The present invention relates to a pretreatment method and device for particulate matter filter material samples, in particular to a method, device and system for separating and extracting particulate matter from a filter material substrate, which solves the lack of specific implementation details and practical problems of existing washing methods. When the washing machine is used as a separation device for washing and separation, the particle loss is large, the separation efficiency is low, and the organic solvent cannot be used for washing. The method is special in that: step 1: put the sampled filter material into the separation device, add water and surfactant; the outer layer of the separation device is a barrel-shaped structure, the inner layer is porous and can rotate; step 2: washing, liquid outflow; step 3: dehydration, residual turbid liquid outflow; step 4: process the turbid liquid outflow from steps 2 and 3; step 5: return the clear liquid obtained after processing to the separation device, repeat steps 2 to 4 at least twice, The supernatant is collected, and the particles are collected on the filter membrane; step 6: the collected supernatant is evaporated under low pressure, and the solid residue obtained is put into the filter membrane of step 5.

Description

technical field [0001] The invention relates to a pretreatment method and device for particulate filter material samples, in particular to a method, device and system for separating and extracting particulate matter from a filter material matrix. Background technique [0002] The use of filter media to capture particulate matter and then perform offline analysis is a common method in the analysis of particulate matter composition. It is often necessary to pre-treat the filter material sample to separate and extract the particulate matter or its components to be analyzed. When the sampling flow rate is small, generally select a chemically inert polytetrafluoroethylene filter membrane or quartz fiber filter material, or a microporous filter membrane that is easily digested completely, for aerosol sampling to facilitate subsequent sample processing (for example: ( 1) Ge Yang et al. Environmental Monitoring Management and Technology. 2007, 19(6): 9-13; (2) Duan Fengkui et al. C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N1/34B01D61/00B01D61/14B01D1/00B01D1/30
CPCB01D1/00B01D1/30B01D61/00B01D61/147G01N1/28G01N1/34
Inventor 刘龙波李冬梅唐寒冰岳晨午周世友
Owner NORTHWEST INST OF NUCLEAR TECH
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