A kind of assay method of soil cyanide and total cyanide

A determination method and technology of cyanide, which is applied in the direction of material analysis, measurement device, and test sample preparation through observation of the influence on chemical indicators, which can solve the problems of accuracy, long color development time, and inability to guarantee uniformity and other issues to achieve the effect of protecting against damage, avoiding damage to the instrument, and ensuring precision and accuracy

Active Publication Date: 2021-08-24
四川省天晟源环保股份有限公司
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Problems solved by technology

The water bath needs 40 minutes for the color development of the sample, and the color development time is longer
[0010] 4. In the prior art, the soil samples tested are all fresh samples, and the uniformity cannot be guaranteed when sampling fresh soil samples, such as having different soil moisture contents, which affects the accuracy of the method detection

Method used

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  • A kind of assay method of soil cyanide and total cyanide
  • A kind of assay method of soil cyanide and total cyanide
  • A kind of assay method of soil cyanide and total cyanide

Examples

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Embodiment 1

[0038] Collect the soil, adjust the pH value of the soil sample to be alkaline, preferably add 1mol / L sodium hydroxide solution, and adjust the pH value of the soil sample to 12. After low-temperature adsorption drying at 4°C to 30°C, it can be dried at any temperature lower than the natural environment within the range of 5°C, 10°C, 15°C, 20°C, 25°C, 30°C and 4°C to 30°C to obtain Dry the soil sample. Crush the soil sample, pick out obvious impurities, such as stones, metal particles, tree roots, plastic particles, fiber filaments, etc., use electrostatic adsorption to remove organic impurity particles in the soil sample, and pass through a 16-mesh sieve to obtain a soil sample. use. Sieve to remove particulate impurities in the soil. The sieved fine powder soil sample can be more fully mixed with the reaction solution to make the reaction more complete.

[0039] Accurately weigh 10.00 g of the soil sample into a distillation flask.

[0040]Distillation is carried out in ...

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Abstract

The invention discloses a method for measuring soil cyanide and total cyanide. The pH value of a soil sample is adjusted to be alkaline, a soil sample without impurities is prepared, and the soil sample is weighed quantitatively; It is used for continuous flow analyzer to determine the concentration of cyanide or total cyanide in soil. Using soil sample distillation and continuous flow analyzer to measure the total soil cyanide content can eliminate interference, avoid damage to the instrument, make it safer for the testing personnel, and help protect the analysis equipment from damage. At the same time, the testing work is more efficient. Using low-temperature drying, electrostatic adsorption, sieving, etc., can obtain more standardized soil samples, avoid the influence of metal impurities and organic impurities on the measurement results, and adjust the soil to alkaline before drying to ensure , No cyanide overflow, fully guarantee the precision and accuracy of the test results.

Description

technical field [0001] The invention belongs to the technical field of environmental detection and relates to a method for measuring cyanide, in particular to a method for measuring total cyanide in soil and a method for measuring cyanide in soil. Background technique [0002] Cyanide refers to the compound containing cyano group (-CN) in the compound molecule, which is a highly toxic compound. [0003] Total cyanide refers to the sum of organic cyanides, free cyanide ions, complexes and simple metal cyanides. Cobalt cyanide complexes and rhodanides are not included. Free cyanide refers to the sum of free cyanide ions and simple metal cyanides, excluding organic cyanides. [0004] In the environment mainly HCN, CN - Exist in the form of complex cyanide ions. Human activities such as gold production, electroplating chemical industry, organic chemical industry and other industries have brought a large amount of cyanide-containing wastewater; they have caused great harm to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78G01N1/28G01N1/40
CPCG01N1/28G01N1/4022G01N1/4044G01N21/78G01N2001/4033
Inventor 刘霞张济龙李美玲刘真周玉洁谢飞张卫威童贤清魏莉闵姚群徐海鑫魏文祥张红母万银
Owner 四川省天晟源环保股份有限公司
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