A kind of determination method of arsenic, antimony, bismuth, mercury and selenium in soil

A measurement method and soil technology, applied in chemical instruments and methods, preparation of test samples, material excitation analysis, etc., can solve the problems of sufficient dissolution of elements, inaccurate detection results, etc., and achieve the effect of promoting dispersion

Active Publication Date: 2020-08-07
中煤浙江检测技术有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, during the detection process, due to the different conditions required for the dissolution of each element from the soil, it is difficult to fully dissolve the elements such as arsenic, antimony, bismuth, mercury, and selenium from the soil, resulting in the detection results inaccurate phenomenon

Method used

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  • A kind of determination method of arsenic, antimony, bismuth, mercury and selenium in soil
  • A kind of determination method of arsenic, antimony, bismuth, mercury and selenium in soil
  • A kind of determination method of arsenic, antimony, bismuth, mercury and selenium in soil

Examples

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Embodiment 1

[0040] Embodiment 1: a kind of assay method of arsenic, antimony, bismuth, mercury, selenium in soil comprises the following steps: S1, the preparation of reducing agent: get 5g thiourea, 2.5-5g ascorbic acid, 100g distilled water mix uniformly, obtain reducing agent ;

[0041] S2, according to HJ680-2013, using potassium borohydride solution as the reducing agent and 5+95 hydrochloric acid solution as the carrier, measure the atomic fluorescence intensity of the calibration series standard solutions sequentially from low concentration to high concentration. Use the atomic fluorescence intensity of the calibration series minus the zero concentration blank as the ordinate, and the corresponding element concentration (μg / L) in the solution as the abscissa, draw the standard curves of arsenic, antimony, bismuth, mercury, and selenium respectively, and draw five The standard curves are as Figure 1-Figure 5 shown;

[0042]S3, pretreatment: Weigh 0.2000g of the soil sample that h...

Embodiment 2

[0049] Embodiment 2: a method for assaying arsenic, antimony, bismuth, mercury, and selenium in soil. The difference from Example 1 is that, in S4, the first mixture and the blank mixture obtained in step S3 are respectively placed in a microwave digestion instrument , the first stage of heating up, when the temperature rises to 110°C, keep it warm for 3 minutes; the second stage of heating up, when the temperature rises to 155°C, keep it warm for 5 minutes; sample.

Embodiment 3

[0050] Embodiment 3: a method for assaying arsenic, antimony, bismuth, mercury, and selenium in soil. The difference from Example 1 is that, in S4, the first mixture and the blank mixture obtained in step S3 are respectively placed in a microwave digestion instrument , the first stage of heating up, when the temperature rises to 115°C, keep it warm for 2 minutes; the second stage of heating up, when the temperature rises to 160°C, keep it warm for 4 minutes; sample.

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Abstract

The invention discloses a method for detecting arsenic, antimony, bismuth, mercury and selenium in soil. The method includes following steps: preparing a reducing agent; respectively drawing standardcurves of arsenic, antimony, bismuth, mercury and selenium; subjecting a soil sample to pretreatment, microwave digestion and detection, and correspondingly acquiring content of arsenic, antimony, bismuth, mercury and selenium through acquired light absorbance and the standard curves. The method has the advantages that arsenic, antimony, bismuth, mercurcy and selenium elements are fully dissolvedout, and detection results are accurate.

Description

technical field [0001] The invention relates to the technical field of element detection in soil, in particular to a method for determining arsenic, antimony, bismuth, mercury and selenium in soil. Background technique [0002] With the increasing degree of modern industrialization, the emphasis on environmental pollution is also increasing. However, there are still factories that do not discharge pollutants in accordance with national regulations, causing pollution to the soil, causing high concentrations of arsenic, antimony, bismuth, mercury and other elements in the soil, posing varying degrees of threats to crops and human bodies. In addition, the soil in some areas also contains selenium. The arsenic, antimony, bismuth, mercury, and selenium elements in the soil are detected to obtain the exact content of the above five elements in the soil. [0003] However, during the detection process, due to the different conditions required for the dissolution of each element fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64G01N1/44B01J19/02
CPCB01J19/02G01N1/44G01N21/64
Inventor 李伟沈国新诸晓锋
Owner 中煤浙江检测技术有限公司
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