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Identification method and system for identifying 14c nuclide in urea[14c] capsules

A capsule and urea technology, applied in radiation measurement, material analysis using wave/particle radiation, instruments, etc., to avoid the influence of subjective factors and convert objectively

Active Publication Date: 2022-07-26
SHENZHEN ZHONGHE HEADWAY BIO SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for identifying urea[ 14 C] in capsule 14 C nuclide identification method and system

Method used

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  • Identification method and system for identifying 14c nuclide in urea[14c] capsules
  • Identification method and system for identifying 14c nuclide in urea[14c] capsules

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Embodiment 1

[0037] figure 2 Shown is an embodiment of the present invention for identifying urea [ 14 C] in capsules 14 The flow chart of the identification method of C nuclide, such as figure 2 As shown, the present invention provides for identifying urea [ 14 C] in capsules 14 The identification method of C nuclide includes the following steps:

[0038] Step S1, preparing a test solution;

[0039] Specifically, in an embodiment of the present invention, take 1 grain of urea [ 14 C] Capsule, dissolve with 3ml water with slight heat, as the test solution.

[0040] Step S2, respectively obtain the beta energy spectrum of the test solution, 14 The β energy spectrum of the C standard source, the QPE of the test solution, 14 C standard source QPE, and calculate the maximum energy of the test sample;

[0041] Specifically, in an embodiment of the present invention, measure 20 μl of the test solution and place it in a 20 ml liquid scintillation vial, add 9 ml of scintillation fluid t...

Embodiment 2

[0055] Based on the same inventive concept, the present invention also provides a method for identifying urea [ 14 C] in capsules 14 An identification system for C nuclides, including a liquid scintillation measuring instrument and an identification module, the liquid scintillation measuring instrument is used to obtain the beta energy spectrum of the test solution, 14 The β spectrum of the C standard source, the QPE of the test solution and the 14 The QPE of the C standard source; the identification module is used for 14 The β spectrum of the C standard source, the QPE of the test solution and the 14 The QPE of the C standard source generates the identification result.

[0056] Specifically, in an embodiment of the present invention, the identification module includes:

[0057] Calculation unit, based on the QPE of the test solution and 14 The QPE of the C standard source calculates the maximum energy of the test solution, and the calculation unit calculates the maximum ...

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Abstract

The invention discloses a method for identifying urea [ 14 C] in capsules 14 The method for identifying C nuclides includes: step S1, preparing a test solution; step S2, respectively obtaining the beta energy spectrum of the test solution, 14 The β spectrum of the C standard source, the QPE of the test solution and the 14 The QPE of the C standard source; Step S3, according to the beta energy spectrum of the test solution, 14 The β spectrum of the C standard source, the QPE of the test solution and the 14 The QPE of the C standard source generates the identification result. In the present invention, the test sample measured under the same conditions and the 14 The QPE of the C standard source can be converted to the maximum energy of the test sample; this method has the advantage of not needing to perform energy calibration on the liquid scintillation measuring instrument, and the conversion through the measurement results is more objective and accurate, avoiding human judgment of energy Subjective influence of endpoints.

Description

technical field [0001] The present invention relates to a kind of analysis method of radioactive medicine, more specifically, relate to a kind of method for identifying urea [ 14 C] in capsules 14 C nuclide identification method and system. Background technique [0002] Urea [ 14 C] belongs to the class of a radioactive substance whose identification includes 14 The identification of C nuclides and the identification of urea, among which, the identification of urea can be determined by paper chromatography, which is judged by the Rf value of the color spots; 14 Identification of C nuclides, due to 14 C is a low-energy beta nuclide, and the energy spectrum of beta rays emitted by the beta nuclide is a continuous spectrum, and the energy change can be distributed from 0 to a certain maximum value (ie, the end point energy); when the unknown sample contains two maximum β energies When similar pure beta nuclides are present, their identification will be very difficult. for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/00G01N33/15G01T1/36
CPCG01N23/00G01N33/15G01T1/362G01N33/0093
Inventor 魏翠雯卿晶陈坚明沈桂富戴雄新王春玲杨永刚
Owner SHENZHEN ZHONGHE HEADWAY BIO SCI & TECH CO LTD
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