Method, device and system for detecting heavy metals in soil

A detection device and detection method technology, applied in the field of soil detection, can solve the problems of analysis result error, volatile component loss, etc., and achieve the effect of ensuring comprehensiveness, reliability and accuracy

Inactive Publication Date: 2015-04-01
IMDETEK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing heavy metal detection methods are mainly based on "field sampling-indoor air drying-digestion-chemical analysis". The inventor found through research that this analysis method is likely to cause the loss of volatile components, resulting in large errors in the analysis results

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  • Method, device and system for detecting heavy metals in soil
  • Method, device and system for detecting heavy metals in soil
  • Method, device and system for detecting heavy metals in soil

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Embodiment 1

[0053] At present, heavy metal detection methods are basically based on "field sampling-indoor air drying-digestion-chemical analysis". After research, it is found that this laboratory chemical analysis method is not only time-consuming and labor-intensive in sampling, but also easily causes the loss of volatile components, resulting in There are errors in the analysis, and the cost is high and the detection cycle is long. Based on this, such as figure 1 As shown, the embodiment of the present invention provides a soil heavy metal detection method, which is applied to a soil heavy metal detection device, and the soil heavy metal detection device is preset with a spectral standard sample of a soil sample with known heavy metal content and type. The standard sample includes the first characteristic X-ray spectrum of the heavy metal in the soil sample under preset detection conditions, and the first characteristic X-ray spectrum includes a wavelength corresponding to the heavy met...

Embodiment 2

[0068] At present, heavy metal detection methods are basically based on "field sampling-indoor air drying-digestion-chemical analysis". After research, it is found that this laboratory chemical analysis method is not only time-consuming and labor-intensive in sampling, but also easily causes the loss of volatile components, resulting in There are errors in the analysis, and the cost is high and the detection cycle is long.

[0069] Based on this, if image 3As shown, the embodiment of the present invention provides a soil heavy metal detection device, which is used to apply the soil heavy metal detection method, and the soil heavy metal detection device includes: a preset unit 200, which is used to preset soil samples with known heavy metal content and type Spectral standard sample, the spectral standard sample includes the first characteristic X-ray spectrum of the heavy metal in the soil sample under preset detection conditions, and the first characteristic X-ray spectrum in...

Embodiment 3

[0076] At present, heavy metal detection methods are basically based on "field sampling-indoor air drying-digestion-chemical analysis". After research, it is found that this laboratory chemical analysis method is not only time-consuming and labor-intensive in sampling, but also easily causes the loss of volatile components, resulting in There are errors in the analysis, and the cost is high and the detection cycle is long. Based on this, such as Figure 5 As shown, the embodiment of the present invention provides a soil heavy metal detection system, including: an excitation device 300, which is used to emit X-rays to irradiate the soil to be detected, so that the soil to be detected emits second characteristic X-rays; an optical path device 301, used to make the second characteristic X-ray emitted by the soil to be detected enter the cadmium zinc telluride CZT detector 302; the CZT detector 302 is used to convert the second characteristic X-ray into a voltage signal; soil heavy...

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Abstract

An embodiment of the invention provides a method, a device and a system for detecting heavy metals in soil and belongs to the field of soil detection. The method comprises steps as follows: under a preset detection condition, the device for detecting the heavy metals in the soil acquires the second characteristic X-ray spectrum of to-be-detected soil, and the second characteristic X-ray spectrum comprises the wavelength and the intensity corresponding to the heavy metals in the to-be-detected soil; the wavelength and the intensity in the second characteristic X-ray spectrum are compared with those in a first characteristic X-ray spectrum, and types of the heavy metals corresponding to the wavelength, identical to the wavelength in the second characteristic X-ray spectrum, in the first characteristic X-ray spectrumare used as types of the heavy metals in the to-be-detected soil; the intensities, corresponding to same types of heavy metals, in the first and second characteristic X-ray spectrums are compared, the content of the heavy metals in the to-be-detected soil is obtained according to the corresponding relation between the intensity and the known content of the heavy metals in the first characteristic X-ray spectrum, and the accuracy of soil heavy metal detection results is significantly improved.

Description

technical field [0001] The invention relates to the field of soil detection, in particular to a soil heavy metal detection method, device and system. Background technique [0002] With the continuous development of modern industrial technology and the aggravation of environmental pollution, various soil pollution problems have attracted more and more attention. Especially heavy metal element pollution, which accumulates through the food chain and endangers human health, so timely detection of heavy metal content in soil is of great significance to control heavy metals entering the human body. [0003] Existing heavy metal detection methods are mainly based on "field sampling-indoor air drying-digestion-chemical analysis". The inventors found through research that this analysis method is likely to cause the loss of volatile components, resulting in large errors in the analysis results. Contents of the invention [0004] The purpose of the embodiments of the present inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/22
Inventor 李阳王淑琼盛丽娜吕淑丽贺亚鹏汤三奇
Owner IMDETEK
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