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Sample rapid digestion method for detecting radionuclide

A radionuclide and sample technology, which is applied in the field of radionuclide detection, can solve the problems of long sample digestion time, failure to meet the rapid and large-throughput detection requirements, and large reagent consumption, so as to shorten the digestion time and shorten the measurement. Time, the effect of reducing the cost of analysis

Inactive 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 overcome the shortcomings of the prior art and provide a method for quickly digesting samples to determine radionuclides, which solves the problem that the current sample digestion time is too long and the consumption of reagents is large, which cannot meet the requirements of rapid and large-throughput detection. demand problem

Method used

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  • Sample rapid digestion method for detecting radionuclide
  • Sample rapid digestion method for detecting radionuclide
  • Sample rapid digestion method for detecting radionuclide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] As an embodiment of the method for rapidly digesting samples to determine radionuclides in the present invention, the method for rapidly digesting samples to determine radionuclides in this embodiment is as follows:

[0038] (1) Weigh 5g of rice samples and transfer the samples to the digestion inner tube;

[0039] (2) Add 20mL HNO successively 3 and 3mL H 2 o 2 As a digestion solution, cover the inner cover and place it correctly in the microwave digestion device for microwave digestion;

[0040] In this embodiment, the MULC 8-500 multi-channel ultra-large flux closed microwave digestion system is used for microwave digestion;

[0041] (3) Constant volume of the sample liquid after microwave digestion obtained in step (2) to obtain the sample liquid to be tested.

[0042] The digestion steps are carried out according to Table 3. For the comparison of the properties of the samples before and after digestion, see figure 1 . From figure 1 In (a and b), it can be se...

Embodiment 2

[0046] As an embodiment of the method for rapidly digesting samples to determine radionuclides in the present invention, the method for rapidly digesting samples to determine radionuclides in this embodiment is as follows:

[0047] (1) Weigh 10g of soil sample and transfer the sample to the digestion inner tube;

[0048] (2) Add 50mL HNO successively 3 and 10mL H 2 o 2 As the digestion solution, cover the inner cover and place it correctly in the microwave digestion device for microwave digestion. In this embodiment, the MULC 8-500 multi-channel ultra-large flux closed microwave digestion system is used for microwave digestion; the digestion steps are carried out in accordance with Table 4. :

[0049] Temperature, time and power setting parameters when table 4 digests 10g soil samples

[0050]

[0051] (3) Evaporate the sample liquid after microwave digestion obtained in step (2) to dryness by using an evaporation system, and constant volume to obtain the sample liquid ...

Embodiment 3

[0054] As an embodiment of the method for rapidly digesting samples to determine radionuclides in the present invention, the method for rapidly digesting samples to determine radionuclides in this embodiment is as follows:

[0055] (1) Weigh 1g of Sargassum sample, and transfer the sample to the digestion inner tube;

[0056] (2) Add 3mL HNO successively 3 and 1mL H 2 o 2 As the digestion solution, cover the inner cover and correctly place it in the microwave digestion device for microwave digestion. In this embodiment, the MULC 8-500 multi-channel ultra-large flux closed microwave digestion system is used for microwave digestion; the digestion steps are carried out in accordance with Table 5. :

[0057] Temperature, time and power setting parameters when table 5 digested 1g sargassum sample

[0058]

[0059] (3) Evaporate the sample liquid after microwave digestion obtained in step (2) to dryness by using an evaporation system, and constant volume to obtain the sample ...

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Abstract

The invention discloses a sample rapid digestion method for detecting radionuclide. The method comprises the following steps: (1) weighing a sample, and placing the sample in a microwave digestion tank; (2) adding a digestion solution to the sample, and carrying out microwave digestion in a microwave digestion apparatus; (3) determining the volume of a sample solution after microwave digestion obtained in step (2) to obtain a sample liquid to be tested. In a microwave digestion procedure, the power is 500-800 W, the temperature is 35-130 DEG C, and the reaction time is 25-200 min. According tothe sample rapid digestion method for detecting the radionuclide, the heating is fast, the temperature rise is high, the digestion capacity is strong, the volume of sample digestion is large, and thedigestion time is greatly shortened; the acid solvent consumption is less, and the blank value is low; the sample loss is avoided, and the accuracy and precision of the analysis is improved; the operation is simple, fast, accurate and efficient; the environmental pollution is small, and the working environment is improved; the consumption of electricity is effectively saved, the analysis cost isreduced, and green environmental protection is achieved.

Description

technical field [0001] The invention relates to the technical field of radionuclide detection, in particular to a method for rapidly digesting samples to determine radionuclide. Background technique [0002] Microwave is a kind of electromagnetic wave, which is an electromagnetic wave with a frequency of 300MHz to 300GHz (wavelength in the range of 100cm to 1mm). Internationally, the frequency of civilian microwaves in industry, scientific research, medicine and household use is 2450±50MHz. Because microwave has efficient and uniform heating effect on substances, and the rate of chemical reaction has a significant relationship with temperature, people think of applying microwave to chemical reaction to increase the reaction rate. Although the use of microwaves can greatly speed up chemical reactions and consume very little energy, the use of microwaves can also save energy (Jin Qinhan et al., 1999, P30-31). In 1975, Abu-samra and others used microwave ovens to digest some ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/167
CPCG01T1/167
Inventor 周鹏李冬梅郑远来赵峰赵力
Owner 国家海洋局南海环境监测中心
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