Silicon-based macroporous cation exchange resin and method for separating Po and preparing planar reference source

A cation exchange, silicon-based technology, applied in the direction of material separation, analysis materials, measuring devices, etc., can solve the problems of unqualified equipment, incomplete separation, slow adsorption kinetics, etc., achieve efficient separation, improve efficiency, improve credibility effect

Pending Publication Date: 2022-01-21
SHANGHAI INST OF MEASUREMENT & TESTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the slow adsorption kinetics of traditional commercial cation exchange resin materials, in the process of adsorption and leaching separation, a small amount of Bi and Po will be washed down at the same time, making it difficult to achieve a complete separation of Bi and Po.
[0011] However, if the separation of Pb, Bi and Po is not complete, Pb, Bi and Po will be deposited on the substrate at the same time during the subsequent preparation of the reference source by electrodeposition, resulting in the emission of β particles from the pure α reference source.
If such a reference source convective gas-type proportional counter is used to verify the cross-channel ratio of α-rays to β-rays, additional β-ray counts will be introduced, and it is possible to misjudge the equipment with qualified parameters as unqualified, which will affect the verification. The accuracy and credibility of the results have a serious impact

Method used

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  • Silicon-based macroporous cation exchange resin and method for separating Po and preparing planar reference source
  • Silicon-based macroporous cation exchange resin and method for separating Po and preparing planar reference source
  • Silicon-based macroporous cation exchange resin and method for separating Po and preparing planar reference source

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Experimental program
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Effect test

Embodiment 1

[0103] This embodiment provides a silicon-based macroporous cation-exchange resin and a solid-phase chromatography device; the silicon-based macroporous cation-exchange resin is prepared by the following preparation method:

[0104] (a) Mix 0.2 part of styrene, 0.1 part of divinylbenzene, 0.01 part of AIBN and 0.5 part of acetophenone to obtain a mixed oil phase, and set aside; place 1 part of macroporous silica particles in a rotating In the distillation bottle of the evaporator, add the above-mentioned mixed oil phase to make it fully mixed with the silica particles; heat the reaction system in a water bath, and gradually raise the temperature to 90°C for 10 hours at a constant temperature; Rinse with acetone, and repeatedly suction filter with acetone to prepare the silicon-based macroporous cation exchange resin;

[0105] (2) Transfer the silicon-based macroporous cation exchange resin into the distillation bottle of the rotary evaporator again, add 1 part of toluene, add ...

Embodiment 2

[0108] This embodiment provides a silicon-based macroporous cation-exchange resin and a solid-phase chromatographic device, and the silicon-based macroporous cation-exchange resin is prepared by the following preparation method:

[0109] (a) Mix 0.25 parts of styrene, 0.15 parts of divinylbenzene, 0.015 parts of V-40 and 0.8 parts of acetophenone to obtain a mixed oil phase for subsequent use; place 1 part of macroporous silica particles In the distillation bottle of the rotary evaporator, add the above-mentioned mixed oil phase to make it fully mixed with the silica particles; heat the reaction system in a water bath, and gradually raise the temperature to 80°C for 12 hours at a constant temperature; The product is washed with acetone, and is repeatedly suction-filtered with acetone to prepare the silicon-based macroporous cation exchange resin;

[0110] (2) Transfer the silicon-based macroporous cation exchange resin into the distillation bottle of the rotary evaporator agai...

Embodiment 3

[0113] This embodiment provides a silicon-based macroporous cation-exchange resin and a solid-phase chromatographic device, and the silicon-based macroporous cation-exchange resin is prepared by the following preparation method:

[0114] (a) Mix 0.3 part of styrene, 0.2 part of divinylbenzene, 0.02 part of AIBN and 1 part of tetrabutyl phthalate to obtain a mixed oil phase, set aside; place 1 part of macroporous silica particles In the distillation bottle of the rotary evaporator, add the above-mentioned mixed oil phase to make it fully mixed with the silica particles; heat the reaction system in a water bath, and gradually raise the temperature to 100°C for 9 hours at a constant temperature; The product is washed with acetone, and is repeatedly suction-filtered with acetone to prepare the silicon-based macroporous cation exchange resin;

[0115] (2) Transfer the silicon-based macroporous cation exchange resin into the distillation bottle of the rotary evaporator again, add 1 ...

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Abstract

The invention provides a silicon-based macroporous cation exchange resin and a method for separating Po and preparing a planar reference source. The silicon-based macroporous cation exchange resin comprises a silicon dioxide base material, and a styrene-divinylbenzene copolymer skeleton containing a sulfonic acid group is arranged in a pore channel of the silicon dioxide base material. Meanwhile, the invention further develops and establishes a solid-phase chromatographic separation process for efficiently separating the <210>Po with high nuclear purity from the <210>Pb solution, a <210>Po standard reference source is successfully developed through an improved electro-deposition process method, and the deposition rate of the <210>Po is close to 100%. The <210>Po solution obtained by separation through the method is high in nuclear purity, after the standard reference source is prepared through the electro-deposition method, alpha and beta crosstalk ratio data increase caused by the nuclear purity of the reference source when a gas flow type low background alpha / beta measuring instrument is verified can be effectively reduced, the credibility of test data is improved, and the verification and calibration accuracy of the instrument is improved.

Description

technical field [0001] The invention belongs to the field of separation of radionuclides and radioactivity monitoring in nuclear facilities and environments, and specifically relates to a silicon-based macroporous cation exchange resin and its preparation method and application, in particular to a silicon-based macroporous cation exchange resin, A solid phase chromatographic device comprising it, utilizing it from 210 Separation from Pb solution 210 Po's method, isolated from 210 Po solution, obtained by separation 210 A method for preparing a pure α-plane reference source from a Po solution. Background technique [0002] Referring to the "JJG1100-2014 Verification Regulations for Total α and Total β Measuring Instruments of Gas-flow Proportional Counters", the α and β cross-channel ratios of the total α and total β measuring instruments of gas-flow proportional counters are tested using a pure α emitter 210Po source. The verification regulations stipulate that when the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06
CPCG01N30/06
Inventor 陈彦良韩刚赵超何林锋唐方东
Owner SHANGHAI INST OF MEASUREMENT & TESTING TECH
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