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Gamma-ray spectra nuclide detection analysis method used in biological sample

A technology of gamma energy spectroscopy and biological samples, which is applied in the field of nuclide detection, can solve the problems of increased uncertainty of measurement results, many pre-processing steps, and large environmental pollution, shortening measurement time, solving technical bottlenecks, environmental pollution, etc. low impact effect

Active Publication Date: 2019-01-18
国家海洋局南海环境监测中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a gamma energy spectrum nuclide detection and analysis method in biological samples in view of the deficiencies of the prior art, which solves the problem that the current measurement of gamma nuclides in biological samples has many pretreatment steps, which is time-consuming and labor-intensive, and causes serious environmental pollution. , it is easy to cause the loss of nuclide, which leads to the problem that the uncertainty of the measurement result increases

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  • Gamma-ray spectra nuclide detection analysis method used in biological sample
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Embodiment 1

[0037] As an embodiment of the gamma spectrum nuclide detection and analysis method in the biological sample of the present invention, the gamma spectrum nuclide detection and analysis method in the biological sample of the present embodiment includes the following steps:

[0038] (1) Classify the biological samples, after cleaning, drying and weighing, choose to crush them into pulp or cut them into sections according to the water content of the samples;

[0039] If the sample has a lot of moisture, put it into a pulverizer and crush it into a pulp; if the sample has too little moisture, it cannot be easily crushed into a pulp, and it is cut into small pieces by hand;

[0040] (2) Transfer the processed samples that have been crushed into pulp or cut into sections to a vacuum freeze dryer for freeze-drying. The freezing temperature in freeze-drying is -50°C, the drying temperature is 50°C, and the vacuum degree is not greater than 120 Pa. Freeze drying time is 20h;

[0041] ...

Embodiment 2

[0046] As an embodiment of the gamma spectrum nuclide detection and analysis method in the biological sample of the present invention, the gamma spectrum nuclide detection and analysis method in the biological sample of the present embodiment includes the following steps:

[0047] (1) Classify the biological samples, after cleaning, drying and weighing, choose to crush them into pulp or cut them into sections according to the water content of the samples;

[0048] If the sample has a lot of moisture, put it into a pulverizer and crush it into a pulp; if the sample has too little moisture, it cannot be easily crushed into a pulp, and it is cut into small pieces by hand;

[0049] (2) Transfer the processed samples that have been crushed into pulp or cut into sections to a vacuum freeze dryer for freeze-drying. The freezing temperature in freeze-drying is -60°C, the drying temperature is 60°C, and the vacuum degree is not greater than 120 Pa. Freeze drying time is 15h;

[0050] ...

Embodiment 3

[0055] As an embodiment of the gamma spectrum nuclide detection and analysis method in the biological sample of the present invention, the gamma spectrum nuclide detection and analysis method in the biological sample of the present embodiment includes the following steps:

[0056] (1) Classify the biological samples, after cleaning, drying and weighing, choose to crush them into pulp or cut them into sections according to the water content of the samples;

[0057] If the sample has a lot of moisture, put it into a pulverizer and crush it into a pulp; if the sample has too little moisture, it cannot be easily crushed into a pulp, and it is cut into small pieces by hand;

[0058] (2) Transfer the processed samples that have been crushed into pulp or cut into sections to a vacuum freeze dryer for freeze-drying. The freezing temperature in freeze-drying is -40°C, the drying temperature is 40°C, and the vacuum degree is not greater than 120 Pa. Freeze drying time is 18h;

[0059] ...

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Abstract

The invention discloses a gamma-ray spectra nuclide detection analysis method used in a biological sample, which comprises the following steps of: (1) after classifying, cleaning, air-drying and weighing the biological sample, carrying out smashing pulping or cutting segmentation processing; (2) carrying out freeze drying on the sample; (3) carrying out grinding smashing on the freeze-dried sample, sieving, calculating a dry-fresh ratio of the biological sample, and obtaining biological freeze-dried powder; (3) carrying out pressing formation on the biological freeze-dried powder by utilizinga die; (4) carrying out vacuum packaging on the sample subjected to pressing formation; and (5) carrying out high-purity germanium or sodium iodide gamma-ray spectra nuclide detection. The gamma-ray spectra nuclide detection analysis method adopts a biological radioactive rapid pretreatment method combining large-volume rapid freeze drying, grinding smashing and die-pressing source making, implements rapid relative measurement of nuclide by a radioactive gamma-ray spectra method, and is beneficial for implementing biological radioactive detection analysis which is simple, rapid, efficient, lowin cost, low in environment pollution, scientific and accurate.

Description

technical field [0001] The invention relates to the technical field of nuclide detection, in particular to a gamma energy spectrum nuclide detection and analysis method in biological samples. Background technique [0002] The main method of high-purity germanium gamma spectrum analysis method is: place the biological sample made of a certain geometric shape at the appropriate position of the germanium detector in the spectrometer system, obtain the sample gamma spectrum and determine the full energy peak position and net peak area, according to the gamma spectrum The energy scale coefficient of the instrument, the scale coefficient of the full-energy peak efficiency, the emission probability of gamma rays, the mass or volume of the sample, and related parameters or correction coefficients, etc., determine the types of radionuclides contained in the sample and their activity concentrations. The traditional radionuclide pretreatment method for biological samples generally incl...

Claims

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Application Information

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IPC IPC(8): G01T1/167
CPCG01T1/167
Inventor 周鹏李冬梅赵力郑远来赵峰
Owner 国家海洋局南海环境监测中心
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