Electroplating sampling detection method of 210Po in chemical prospecting sample of mineral exploration by polonium method

A determination method and 210po technology, which are applied in the preparation of test samples, radiation measurement, instruments, etc., can solve the problems of large differences in test results, and achieve the effects of easy popularization, high work efficiency, and easy measurement conditions.

Active Publication Date: 2018-06-05
核工业二三0研究所
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned standards only involve the field prospecting process. Up to now, there has not been a sample suitable for polonium prospecting and geochemical prospecting in China. 210 The analysis and determination method of Po is an industry standard, which leads to the lack of a unified standard for each laboratory, and the test results are quite different from each other. Moreover, when applying for the laboratory test parameter qualification, it is passive because there is no standard corresponding to this parameter.

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  • Electroplating sampling detection method of 210Po in chemical prospecting sample of mineral exploration by polonium method
  • Electroplating sampling detection method of 210Po in chemical prospecting sample of mineral exploration by polonium method
  • Electroplating sampling detection method of 210Po in chemical prospecting sample of mineral exploration by polonium method

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Embodiment 1

[0059] Polonium method in mineral prospecting and geochemical prospecting samples 210 The electroplating sample preparation assay method of Po comprises the following steps:

[0060] (1) Sample preparation: dry or dry the sample in time, crush it to a particle size of 350 μm, obtain the sample, and pack it into a bag for later use; 210 Po specific activity ≥ 1.73Bq / kg;

[0061] (2) Blank test: carry out a double blank test together with the sample, and the reagents used must be taken from the same reagent bottle;

[0062] (3) Calibration test: Analyze the same type of standard sample along with the sample: In order to determine the accuracy of the analysis and measurement and the measurement stability of the instrument, the detection efficiency of the α channel of the instrument is regularly calibrated during the measurement process, and the active area of ​​the standard source is used for calibration. with the same geometry as the sample 239 Pu, 238 U and other long-life ...

Embodiment 2

[0074] Polonium method in mineral prospecting and geochemical prospecting samples 210 The electroplating sample preparation assay method of Po comprises the following steps:

[0075] (1) Sample preparation: dry or dry the sample in time, crush it to a particle size of 47 μm, obtain the sample, and pack it into a bag for later use; 210 Po specific activity ≥ 1.73Bq / kg;

[0076] (2) Blank test: carry out a double blank test together with the sample, and the reagents used must be taken from the same reagent bottle;

[0077] (3) Calibration test: analyze the same type of standard sample along with the sample; in order to determine the accuracy of the analysis and measurement and the measurement stability of the instrument, the detection efficiency of the α channel of the instrument is regularly calibrated during the measurement process, and the active area of ​​the standard source is used for calibration. with the same geometry as the sample 239 Pu, 238 U and other long-life a...

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Abstract

The invention belongs to the field of 210Po detection method, and particularly discloses an electroplating sampling detection method of 210Po in a chemical prospecting sample of mineral exploration bya polonium method. The method comprises the following steps: airing or drying a sample in time, grinding until the granularity is less than 417mu m to obtain a specimen, and filling into a bag for later use; weighing the specimen, putting into a beaker, adding ascorbic acid, and adding a hydrochloric acid solution 1#; putting a pre-treated copper sheet into the beaker, and shaking in a constant-temperature shaking bath at 60 DEG C for 110-130 minutes; taking out the sheet after shaking is completed, washing with tap water, and drying the sheet for detecting; measuring the alpha counting ratealpha on the sheet copper surface on a low-background alpha measurement instrument after the sheet is taken off for 30 minutes, and calculating the specific activity of 210Po according to a formula. The method for detecting 210Po in a chemical prospecting sample by adopting an electroplating sampling method has high working efficiency for field mineral exploration, is not influenced by thorium, climate and the like, has a wide detection range, simple analyzing process and easily controlled measurement condition, and is convenient for popularization and application.

Description

technical field [0001] The invention belongs to 210 The field of determination method of Po, specifically relates to a polonium method in mineral prospecting and geochemical prospecting samples 210 Determination method of electroplating samples for Po. Background technique [0002] The standard analysis method for 210Po in rock, soil and other samples has not yet been promulgated in China. Currently, only water 210 The standard analysis and test method of Po, "Analysis Method of Polonium-210 in Water" (HJ 813-2016) was formulated and promulgated by the Nuclear Facility Safety Supervision Department and the Science and Technology Standards Department of the Ministry of Environmental Protection of the People's Republic of China, and was formulated by the Central South Geological Survey Bureau of the Pronuclear Industry in 1981 The "Provisional Regulations for Polonium Prospecting" only briefly outlines the indoor analysis of chemical prospecting samples, and expresses the me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01T7/02
CPCG01N1/28G01T7/02
Inventor 张鑫柳金良钟春明刘朝鄢飞燕刘群芳黄宏业岳启建范鹏飞黄宇琦董湘龙欧阳平宁颜越陶志军
Owner 核工业二三0研究所
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