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A method for measuring harmful substances in environmental monitoring

A determination method and technology for harmful substances, applied in the field of chemical verification, can solve the problems of complex batch determination, deviation of determination results, complicated operation process, etc., and achieve the effects of rapid determination, long storage time, and improvement of drying efficiency.

Active Publication Date: 2018-08-24
NINGBO PTS PROD TECH SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the determination method of soil harmful metal ions, the pretreatment process is complicated and takes a long time; and the repeated manual treatment process is very easy to cause the loss of samples, which makes the measurement results deviate, and the batch measurement is complicated, etc. problem, need to improve

Method used

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  • A method for measuring harmful substances in environmental monitoring
  • A method for measuring harmful substances in environmental monitoring
  • A method for measuring harmful substances in environmental monitoring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Select the soil samples in the area to be tested in batches, and send them into a ball mill for grinding for 1 hour. The ball-to-material ratio is 10:1. After the ball milling, take out the samples, weigh their mass, and count it as M;

[0025] Put the ball-milled soil sample above into a dryer and dry it at 80°C for 6 hours until the water in the soil sample is completely removed. Weigh its mass and calculate it as M 0 , get the quality coefficient A=M / M0;

[0026] Send the above-mentioned dried soil samples into a mill and sieve machine for grinding and sieving. The ball-to-material ratio is 8:1. During the ball milling process, 100°C hot air is passed through. After the ball milling and sieving, soil samples with a particle size of less than 240 meshes are taken. ;

[0027] The above-mentioned ground and sieved soil samples were pressed into a square sample block with a weight of 5g on a briquetting machine, and placed in a plastic box for sealed preservation;

[0...

Embodiment 2

[0032] Select the soil samples in the area to be tested in batches, and send them to a ball mill for grinding for 2 hours. The ball-to-material ratio is 12:1. After the ball milling, take out the samples, weigh their mass, and count it as M;

[0033] Put the ball-milled soil sample above into a dryer and dry it at 90°C for 8 hours until the water in the soil sample is completely removed. Weigh its mass and calculate it as M 0 , get the quality coefficient A=M / M0;

[0034] Send the above-mentioned dried soil samples into a mill and sieve machine for grinding and sieving. The ball-to-material ratio is 10:1. During the ball milling process, hot air at 120°C is passed through. After the ball milling and sieving, soil samples with a particle size of less than 240 meshes are taken. The above-mentioned soil sample through grinding and sieving is pressed into a square sample block with a weight of 5g on a briquette machine, and placed in a plastic box for sealed preservation;

[0035...

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Abstract

The invention discloses a method for determining harmful substances. The method comprises the following steps: selecting a soil sample; subjecting the soil sample to ball milling, drying, ball milling again, screening and briquetting so as to obtain a sample block; and then dissolving the sample block with a solvent and determining harmful substances like heavy metal ions. According to the invention, through ball milling at first, moisture in the sample can be completely removed, so drying efficiency is improved; secondary grinding and screening are carried out after drying, so the particle size of the sample is smaller and uniform, which facilitates adequate dissolving in subsequent determination process; hot wind is introduced in secondary grinding and screening, so errors in measurement results caused by water absorption in secondary grinding and screening are prevented; and through batch briquetting treatment, rapid determination of a large number of samples is facilitated, troublesome manual weighing is prevented, the storage time of the sample is long, and a standby sample can be taken for determination when original measurement data is doubted in the future.

Description

technical field [0001] The invention belongs to the field of chemical testing, in particular to a method for measuring harmful substances in environmental monitoring. Background technique [0002] With the development of modern industry, environmental problems have become increasingly prominent. If waste water, waste gas, and waste residue in heavy industry production are not effectively treated, they will be discharged into waters and soil, which will cause serious damage to the ecological environment and affect people's lives. Health, therefore, the detection of harmful substances in the environment has become extremely important. If there is no effective monitoring of harmful substances in soil and water such as heavy metal ions, they will enter the ecological cycle with crop plants and eventually deposit in animals or humans. Therefore, it is very necessary to measure harmful metal ions in soil. Soil The colloid has a large specific surface area and strong chargeability...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24G01N1/28
CPCG01N1/286G01N33/24G01N2001/2866
Inventor 王猛纪轶邵波
Owner NINGBO PTS PROD TECH SERVICE