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Method for measuring total alpha and total beta radioactivity specific activity in water

A technology of beta radioactivity and specific activity, applied in the field of determination of total alpha and total beta radioactivity specific activity in water, can solve the problem of uneven sample source preparation, reduce the detection efficiency of the instrument, etc., to avoid low detection data and improve detection. Efficiency, uniform heating effect

Pending Publication Date: 2022-02-15
黑龙江省原子能研究院
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for the preparation of total α and total β sample sources in the analysis water, so as to solve the problem of uneven sample source preparation in the prior art, which will reduce the detection efficiency of the instrument

Method used

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  • Method for measuring total alpha and total beta radioactivity specific activity in water
  • Method for measuring total alpha and total beta radioactivity specific activity in water

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Experimental program
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Embodiment 1

[0031] 1. Sample source preparation:

[0032] (1) Take 1L of water sample, add 20mL of concentrated nitric acid, put it into a 2.5L instrument sample tray, and use a water quality radioactive microwave evaporator to evaporate and concentrate the water sample; concentrate the water sample to about 50ml and transfer it to a pre-constant weight In the porcelain boat, wash the 2.5L instrument sample tray with water, transfer the combined washing solution to the porcelain boat, slowly add 1mL concentrated sulfuric acid into the porcelain boat along the wall of the vessel, mix it with the concentrated solution, and heat to prevent splashing; Evaporate until the smoke clears; put the porcelain boat with the residue into the muffle furnace, and burn it at 350°C for 1 hour until it burns into ashes;

[0033] (2) Utilize the stainless steel medicine spoon to scrape off the ash sample after burning, take the ash sample of 30mg and transfer in the agate mortar;

[0034] (3) Take about 1m...

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Abstract

The invention discloses a method for measuring total alpha and total beta radioactivity specific activity in water, and belongs to the technical field of radioactivity detection. The problem that the detection efficiency of an instrument is reduced due to non-uniform preparation of a sample source in the prior art is solved. The method comprises the following steps: fully mixing a sample ash sample with acetone to form a uniform mixed solution, sucking the mixed solution by using a rubber head dropper, uniformly dripping the mixed solution into an instrument sample disc, gradually diffusing from the middle position to the periphery, and uniformly and fully coating the instrument sample disc drop by drop, so that the thickness of the sample in the instrument sample disc is gradually thinned from the middle to the periphery, the probe can better receive alpha and beta rays emitted by a sample, and the detection efficiency of the single-probe detection equipment on the sample is improved.

Description

technical field [0001] The invention relates to a method for measuring the specific activity of total α and total β radioactivity in water, belonging to the technical field of radioactivity detection. Background technique [0002] Measurement of total α and total β radioactivity in environmental water (surface water, precipitation, groundwater, drinking water, waste water) is quick and cost-effective. It not only saves time, but also saves a lot of manpower and material resources. It is one of the common radioactive analysis processes. , has been widely used in environmental monitoring. The measurement of total α and total β radioactivity can preliminarily determine the pollution level of samples; provide screening indicators for whether it is necessary to continue nuclide analysis of samples; , the analysis of individual nuclides is replaced by the measurement of total release; the results of total release measurement are also used as the basis for radioactive management. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/178
CPCG01T1/178
Inventor 赵弘韬史岩赵浚锋张建伟斯琴图雅孙培琳
Owner 黑龙江省原子能研究院
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