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63Ni activity concentration measuring method

A technology for concentration measurement and activity, applied in measuring devices, material analysis through electromagnetic means, instruments, etc., can solve the problems of unfriendly environment, low measurement accuracy, incomplete measurement indicators, etc., to avoid β-ray interference , Improve the accuracy of measurement, the effect of small interference

Active Publication Date: 2018-11-30
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology

[0010] The purpose of the present invention is to provide a 63 The Ni activity concentration measurement method solves the problems of low measurement accuracy, unfriendly environment and incomplete measurement indicators caused by the existing liquid scintillation counter method

Method used

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Embodiment

[0056] A sort of 63 The Ni activity concentration measurement method includes the following steps:

[0057] 1), prepare the sample Y1 to be tested into sample Y2 and sample Y3 respectively, the preparation requirements of sample Y2 are: the nitric acid system with a volume ratio of 2% does not produce Tyndall phenomenon, and the nickel mass concentration is controlled at 1 mg by dilution or concentration / L, the dilution or concentration ratio is d; the preparation requirements of sample Y3 are: a nitric acid system with a volume ratio of 2%, the isobaric interference of nickel isotopes 18MΩ.cm;

[0058] 2), adopt atomic emission spectrometry to measure the nickel mass concentration in sample Y2, concrete steps are:

[0059] a1), prepare nickel standard solutions B1, B2, B3, B4 and B5: the nickel standard is a natural nickel spectral standard solution of 1000mg / L, and the standard solution is diluted to prepare a mass concentration of 0.5mg / L and 1mg / L respectively , 5mg / L, ...

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Abstract

The invention discloses a 63Ni activity concentration measuring method. The method comprises the following steps: step 1), preparing a sample to be tested Y1 into a sample Y2 and a sample Y3 respectively; step (2), measuring the mass concentration of nickel in the sample Y2 by adopting an atomic emission spectrometry; step 3), measuring the nickel isotopic abundance ratio of the sample Y3 by adopting an inductive coupling plasma mass spectrometry; and step 4), calculating the mass concentration of nickel C', the nickel isotopic abundance ratio R'i8, the nickel isotopic abundance ratio Ni, N8,the 63Ni mass concentration C3, and the 63Ni activity concentration A3 of the sample to be tested Y1. The 63Ni activity concentration measuring method provided by the invention solves the problem thatan existing liquid scintillation counter method leads to low measurement accuracy, environmentally unfriendly, and incomplete measurement indexes.

Description

technical field [0001] The invention relates to the technical field of radionuclide measurement, in particular to a 63 Ni activity concentration measurement method. Background technique [0002] 63 Ni has a half-life of 101.2 years and can produce 100% pure beta rays, E β The maximum is 66.9KeV. 63 Ni is the most widely used low-energy beta radiation source in the world. It is the key raw material for the development of radioactive volt-effect isotope batteries, which can provide stable energy for devices in special environments such as space and deep sea. also, 63 Ni, as a neutron activation product, widely exists in reactor components (such as stainless steel, graphite, concrete, lead and aluminum alloy), and is one of the key nuclides in the investigation of decommissioning source items of nuclear facilities. Therefore, accurate measurement 63 Ni activity is of great significance. [0003] because 63 Ni is a low-energy beta radiator, and the emitted beta particles...

Claims

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Application Information

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IPC IPC(8): G01N27/62G01N21/62
CPCG01N21/62G01N27/62
Inventor 梁帮宏苏冬萍张劲松陈云明李兵孙鹏李顺涛李子彦周春林李新政钟军
Owner NUCLEAR POWER INSTITUTE OF CHINA
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