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Method for measuring and analyzing lead-210 in soil or organisms

A technology for measuring analysis and soil, which is applied in the field of radioactive technology measurement, can solve the problems of low detection limit, long analysis period, and inability to measure a small amount of samples, etc., and achieve good stability and reproducibility, high elution efficiency, and anti-interference ability strong effect

Pending Publication Date: 2021-11-23
SHANDONG NUCLEAR POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the problems in the prior art that the lead-210 analysis period is too long, the lower detection limit is not low enough to measure a small amount of samples, etc., the present invention proposes a method for measuring and analyzing lead-210 in soil or organisms, which is extracted by lead resin, liquid The lead-210 in soil and organisms was measured by flash spectrometer and inductively coupled plasma-atomic emission spectrometry. After the correction of background count rate, detection efficiency and chemical recovery rate, the activity concentration of lead-210 in the sample was calculated. Realized the rapid analysis of lead-210 and has a good application prospect

Method used

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  • Method for measuring and analyzing lead-210 in soil or organisms

Examples

Experimental program
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Embodiment 1

[0146] The present embodiment provides a method for measuring and analyzing lead-210 in soil or organisms, the method specifically comprising:

[0147] (1') Pretreatment: take 1.00g soil sample and carry out 500 ℃, burning for 1.5h to obtain the pretreatment sample;

[0148] (2') Enrichment: add 1.00mL lead carrier standard solution, 20mL concentrated nitric acid and 3mL hydrogen peroxide to the pretreated sample, place it on the electric heating plate in the fume hood and keep boiling for 1h, after cooling, filter to obtain the filtrate, and evaporate the filtrate to dryness To obtain mineral crystals, add 15 mL of nitric acid with a concentration of 1.0 mol / L, and heat until the mineral crystals dissolve to obtain a lead-containing solution;

[0149] (3') Purification: the lead-containing solution is transferred to the chromatographic column loading tube of the lead resin of Eichrom-PB-C50-A produced by Triskem Company, and the flow rate is adjusted to be 1mL / min, draining, ...

Embodiment 2

[0154] The present embodiment provides a method for measuring and analyzing lead-210 in soil or organisms, the method specifically comprising:

[0155] (1') pretreatment: take 1.00g bioash sample and carry out 700 ℃, 0.5h burning to obtain pretreatment sample;

[0156] (2') Enrichment: add 1.00mL lead carrier standard solution, 20mL concentrated nitric acid and 3mL hydrogen peroxide to the pretreated sample, place it on the electric heating plate in the fume hood and keep boiling for 1h, after cooling, filter to obtain the filtrate, and evaporate the filtrate to dryness To obtain mineral crystals, add 15 mL of nitric acid with a concentration of 1.0 mol / L, and heat until the mineral crystals dissolve to obtain a lead-containing solution;

[0157] (3') Purification: the lead-containing solution is transferred to the chromatographic column loading tube of the lead resin produced by Eichrom Company, and the model is PB-C50-A, and the flow rate is adjusted to be 2mL / min, draining,...

Embodiment 3

[0162] Using the method of measuring and analyzing lead-210 in soil or organisms in Example 1, the lead-210 in the sample is measured and calculated respectively, the only difference is that the liquid scintillation spectrometer uses a liquid scintillation spectrometer without α / β discrimination mode.

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Abstract

The invention provides a method for measuring and analyzing lead-210 in soil or organisms, the method comprises the following steps: extracting lead resin to obtain a sample solution, measuring the lead-210 in the sample solution by a liquid flash spectrometer and an inductively coupled plasma-atomic emission spectrometry, correcting background counting rate, detection efficiency and chemical recovery rate, and calculating to obtain the activity concentration of the lead-210 in the sample. According to the method, rapid measurement and analysis of the lead-210 are achieved, the analysis period is shortened to 2-3 h compared with 1-2 days of a traditional method, operation is easy, batch production is easy, the cost is low, the anti-interference capacity is high, stability and reproducibility are good, the chemical recovery rate of the lead-210 is high, and the method is suitable for rapid measurement of the lead-210 in the environment under various conditions.

Description

technical field [0001] The invention belongs to the field of radioactive technology measurement, and in particular relates to a method for measuring and analyzing lead-210 in soil or organisms. Background technique [0002] Rapid and accurate analysis of radioactive substances is the basis and key to food safety monitoring, environmental radiation monitoring, and nuclear emergency monitoring. In recent years, the emergency monitoring tasks of radioactive substances in the fields of import and export trade, agricultural environment, industrial environment, nuclear safety, and food safety have surged, which has put forward unprecedented requirements for nuclear and radiation safety work. Radioactive substances have various sources, complex forms, different properties, variable activities, different degrees of hazards, and different emergency disposal methods. It is urgent to develop efficient, accurate, and fast radioactive substance analysis methods. [0003] Lead-210 is a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/36G01T1/204G01N21/73G01N30/02G01N30/74G01N30/06G01N30/08G01N30/14G01N30/12
CPCG01T1/362G01T1/204G01N21/73G01N30/02G01N30/74G01N30/06G01N30/08G01N30/14G01N30/12G01N2030/126G01N2030/062
Inventor 方春鸣姜冬陆地
Owner SHANDONG NUCLEAR POWER CO LTD
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