Method for detecting heavy metal pollution in paddy rice soil

A heavy metal and soil technology, applied in the field of analysis and detection, can solve problems such as pollution, and achieve the effects of increasing experimental efficiency, convenient sample processing, and simple operation

Inactive Publication Date: 2019-09-20
JIANGSU TIANYU DETECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of an existing method for detecting heavy metal pollution in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for detecting heavy metal pollution in rice soil, comprising the steps of:

[0017] S1. With a thickness of 3cm as a layer, 8 layers of soil were collected from top to bottom on the ground, and 10g of each layer of soil was randomly taken and mixed;

[0018] S2. The soil is fully crushed and air-dried, and collected after sieving to remove impurities such as stones and weeds;

[0019] S3. Take 10 g of the soil treated in step S2 and place it in a beaker, add 20 mL of distilled water and stir it with a glass rod to prepare a mixed solution a, use a pH meter to detect the pH value of the mixed solution, and add 0.1 mol / L of NaOH dropwise Solution Adjust the pH value of the mixed solution a to 7.2;

[0020] S4. After filtering the mixed solution a, remove the filter residue to obtain a mixed solution b, add 2mL of 10% ammonia water to the mixed solution b, and stir with a glass rod to prepare a mixed solution c;

[0021] S5. Use atomic absorption spectrophotomet...

Embodiment 2

[0023] A method for detecting heavy metal pollution in rice soil, comprising the steps of:

[0024] S1. With a thickness of 3cm as a layer, 8 layers of soil were collected from top to bottom on the ground, and 10g of each layer of soil was randomly taken and mixed;

[0025] S2. The soil is fully crushed and air-dried, and collected after sieving to remove impurities such as stones and weeds;

[0026] S3. Take 10 g of the soil treated in step S2 and place it in a beaker, add 20 mL of distilled water and stir it with a glass rod to prepare a mixed solution a, use a pH meter to detect the pH value of the mixed solution, and add 0.1 mol / L of NaOH dropwise Solution Adjust the pH value of the mixed solution a to 7.35;

[0027] S4. After filtering the mixed solution a, remove the filter residue to obtain a mixed solution b, add 2mL of 19% ammonia water to the mixed solution b, and stir with a glass rod to prepare a mixed solution c;

[0028] S5. Use atomic absorption spectrophotome...

Embodiment 3

[0030] A method for detecting heavy metal pollution in rice soil, comprising the steps of:

[0031] S1. With a thickness of 3cm as a layer, 8 layers of soil were collected from top to bottom on the ground, and 10g of each layer of soil was randomly taken and mixed;

[0032] S2. The soil is fully crushed and air-dried, and collected after sieving to remove impurities such as stones and weeds;

[0033] S3. Take 10 g of the soil treated in step S2 and place it in a beaker, add 20 mL of distilled water and stir it with a glass rod to prepare a mixed solution a, use a pH meter to detect the pH value of the mixed solution, and add 0.1 mol / L NaOH dropwise Solution Adjust the pH value of the mixed solution a to 7.5;

[0034] S4. After filtering the mixed solution a, remove the filter residue to obtain a mixed solution b, add 2 mL of 32% ammonia water to the mixed solution b, and stir with a glass rod to prepare a mixed solution c;

[0035] S5. Use atomic absorption spectrophotometry...

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PUM

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Abstract

The invention provides a method for detecting heavy metal pollution in paddy rice soil, and relates to the technical field of analysis and detection. The method comprises the following steps that 8 layers of soil are collected from the ground successively from top to bottom, the thickness of each layer is 3cm, 10g of each layer is taken randomly, and then the layers are mixed; the soil is fully crushed and air-dried, and is then collected after that impurities as stones and weeds are removed by sieving, 10g of the soil is taken and placed in a beaker, 20mL distilled water is added, and then a glass rod is used to carry out stirring to prepare a mixed solution a, a pH meter detects a pH value of the mixed solution, and 0.1mol/L NaOH solution is dropped in to adjust the pH value of the mixed solution a to 7.2-7.5; the mixed solution a is filtered to remove filter residues to obtain a mixed solution b, 2mL 10-32% of ammonia water is added into the mixed solution b, and a glass rod is used for stirring to prepare a mixed solution c; and heavy metal in the mixed solution c is detected in a atomic absorption spectrophotometry. The method of the invention is simple in operation and can improve the experimental efficiency.

Description

technical field [0001] The invention belongs to the technical field of analysis and detection, and relates to a method for detecting heavy metal pollution in rice soil. Background technique [0002] The original meaning of heavy metals refers to metals with a specific gravity greater than 5, including gold, silver, copper, iron, mercury, lead, cadmium, etc. Heavy metals accumulate in the human body to a certain extent and can cause chronic poisoning. However, in terms of environmental pollution, heavy metals mainly refer to heavy elements with significant biological toxicity such as mercury (mercury), cadmium, lead, chromium, and metalloid arsenic. Heavy metals are very difficult to be biodegraded. On the contrary, they can be enriched by hundreds of times under the biomagnification of the food chain, and finally enter the human body. Heavy metals can strongly interact with proteins and enzymes in the human body, making them inactive, and may also accumulate in certain orga...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N1/28
CPCG01N1/28G01N21/3103
Inventor 周红军沈红燕郑春娣
Owner JIANGSU TIANYU DETECTION TECH CO LTD
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