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Pentachlorophenol standard sample in soil and preparation method of sample

A pentachlorophenol and standard sample technology, applied in the field of environmental testing, can solve the problems of residual, highly toxic, and unresolved preparations, and achieve the effects of increasing organic matter content, reducing matrix effect, and good permeability

Pending Publication Date: 2020-01-31
JINAN CUSTOMS TECH CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Sodium pentachlorophenate is a broad-spectrum insecticide widely used in my country to kill snails, but it is highly toxic to fish, shellfish and other aquatic products
However, in recent years, it has been discovered that such drugs are still illegally used in shrimp and crab farming
Pentachlorophenol has also been used in large quantities as herbicides, preservatives and insect repellents. Although its production and use have been banned in recent years, there are still certain residues in the environment, and its environmental toxicity effects still exist for a long time
But pentachlorophenol (PCP) in soil does not have good detection method and relevant standard at present, and an important reason is that the preparation of standard sample of pentachlorophenol (PCP) in soil has not solved

Method used

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  • Pentachlorophenol standard sample in soil and preparation method of sample
  • Pentachlorophenol standard sample in soil and preparation method of sample
  • Pentachlorophenol standard sample in soil and preparation method of sample

Examples

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Effect test

Embodiment 1

[0028] In this embodiment, the preparation of a soil sample with a total weight of 6000 g and a pentachlorophenol content of 1.5 mg / kg is taken as an example.

[0029] (1) Preparation of blank soil sample:

[0030] a. Preparation of humus: Wash 1000g of plant fallen leaves collected from the environment and spray 15 grams of decomposing agent (EM fungus straw decomposing agent produced by Henan Nanhua Qianmu Biotechnology) and 2000 grams of tap water. After fully mixing, place in a constant temperature and humidity box Medium (temperature is 55 ℃, humidity is 85%) pile up for 10-30 days to decompose, after decomposing, dry, grind, pass through a 0.25mm sieve for later use;

[0031] b. Preparation of blank soil sample: Pour the soil collected from the environment into a pan, crush the soil block while it is half-dry, remove plant residues and other debris, spread it into a thin layer and turn it frequently, and the air-dried soil sample, Crush with plexiglass (or wooden stick)...

Embodiment 2

[0073] In this embodiment, a sample with a total weight of 3000 g and a content of 5 mg / kg is taken as an example.

[0074] (1) Preparation of blank soil sample:

[0075] a. Humus preparation: wash 500g of plant fallen leaves collected from the environment, spray 7.5 grams of decomposing agent (EM fungus straw decomposing agent produced by Henan Nanhua Qianmu Biotechnology) and 1000 grams of tap water, mix fully and place in a constant temperature and humidity box Medium (temperature is 55 ℃, humidity is 85%) pile up for 10-30 days to decompose, after decomposing, dry, grind, pass through a 0.25mm sieve for later use;

[0076] b. Preparation of blank soil sample: Pour the soil sample collected from the environment into a pan, crush the soil block in a semi-dry state, remove plant residues and other debris, spread it into a thin layer and turn it frequently , the air-dried soil sample was crushed with plexiglass (or wooden stick) and passed through a 2mm plastic (nylon) sieve ...

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Abstract

The invention discloses a pentachlorophenol standard sample in soil and a preparation method of the sample. Humus and a soil sample are mixed according to a certain ratio and then soaked in an ethanolmedium, and at the same time, the pentachlorophenol is dissolved in ethyl alcohol and then mixed and soaked with the soil sample, so that the pentachlorophenol is high in soil permeability, and can be evenly distributed in the soil, volatile ethyl alcohol is adopted as a solvent, a vacuum drying machine carries out mixing and evaporates the ethyl alcohol synchronously, and the whole operation issimple, rapid and without loss of pentachlorophenol. The pentachlorophenol standard sample in soil is prepared for the first time, and the sample and preparation method thereof can be applied to comparison for pentachlorophenol-in-soil detection data between labs, verification for the accuracy of the detection method, calibration of a detection instrument and quality control and check of a test result.

Description

technical field [0001] The invention relates to a standard sample of pentachlorophenol (PCP) in soil and a preparation method thereof, belonging to the field of environmental detection. Background technique [0002] Sodium pentachlorophenate is a broad-spectrum insecticide widely used in my country to kill snails, but it is highly toxic to fish, shellfish and other aquatic products. Sodium pentachlorophenate can be converted into pentachlorophenol (PCP) under acidic conditions. Studies have shown that pentachlorophenol (PCP), as an environmental hormone, has toxic and side effects on the human body, and can cause damage to the central nervous system, liver, and kidney, and endocrine disorders. The U.S. Environmental Protection Agency (EPA) has listed pentachlorophenol (PCP) as a suspected carcinogen and restricted its use. The Ministry of Agriculture of my country issued the following notice prohibiting the use of sodium pentachlorophenate in the production of aquatic food...

Claims

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Application Information

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IPC IPC(8): G01N30/06G01N30/04
CPCG01N30/04G01N30/06G01N2030/047
Inventor 王乐赵钰玲尚贞海解卉周星星胡志春
Owner JINAN CUSTOMS TECH CENT
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