Pretreatment method for extracting organochlorine pesticide from soil
An organochlorine and soil technology, applied in the field of soil testing, can solve the problems of uneven state, low efficiency, large sample soil particles, etc., and achieve the effect of improving processing efficiency, low input cost and reducing loss.
Inactive Publication Date: 2020-06-09
中科检测技术服务(重庆)有限公司
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[0003] The detection of organochlorine pesticides in soil is a relatively common type of soil detection. The existing extraction methods of organochlorine pesticides in soil and sediment are mainly the following: solution extraction method, microwave extraction method and accelerated fluid extraction method. The solution extraction method, the existing pretreatment method is not efficient for the treatment. Before the operation is straight, the soil needs to be treated first to ensure that it can quickly separate the organochlorine pesticide, and the test effect has been reimbursed. However, the current treatment method, The efficiency is low, the treatment is not thorough, and the final sample soil particles obtained are large and inhomogeneous, resulting in uneven separation of organochlorine pesticides during extraction and detection, which directly affects the accuracy of the detection results
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[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.
[0034] refer to Figure 1-5 , a pretreatment method for the extraction of organochlorine pesticides in soil, which is used for the treatment of the soil to be tested before extracting organochlorine pesticides by solution extraction method, the purpose is to refine and uniform the sample soil, which is beneficial to the extraction of organochlorine pesticides It is characterized in that it mainly includes the following steps:
[0035] S1: Centralized low-temperature air-drying of the sample soil;
[0036] S2: The air-dried sample soil was ground and continued to be air-dried;
[0037] S3: Collect the ground sample soil and shake it horizontally;
[0038] S4: Fill ...
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The invention discloses a pretreatment method for extracting an organochlorine pesticide from soil. The method is used for treating soil to be detected before extracting the organochlorine pesticide by adopting a solution extraction method, aims to refine and uniformly extract sample soil and is beneficial to the extraction of the organochlorine pesticide, and mainly comprises the following steps:S1, carrying out centralized low-temperature air drying on the sample soil; S2, grinding the air-dried sample soil, and continuously air-drying; S3, collecting the ground sample soil, and carrying out horizontal oscillation; S4, putting the oscillated sample soil in bottles, putting anhydrous dehydrating agents into the filled bottles, and covering the bottles with bottle caps; S5, placing the bottles with the sample soil in an overturning vibration machine to be vibrated; S6, subjecting the soil sample to bottle replacement and filling, adding the anhydrous dehydrating agents, and covering the bottles with the covers; S7, carrying out ultrasonic crushing on the soil sample; and S8, completing soil pretreatment. The method has the advantages of being high in efficiency, convenient to operate and accurate in result.
Description
technical field [0001] The invention relates to the technical field of soil detection, in particular to a pretreatment method for extracting organochlorine pesticides in soil. Background technique [0002] Soil environment detection refers to determining the environmental quality (or pollution degree) and its change trend through the determination of representative values of factors affecting soil environmental quality. What we usually call soil monitoring refers to soil environment monitoring, which generally includes point sampling, Technical content such as sample preparation, analysis method, result characterization, data statistics and quality evaluation. [0003] The detection of organochlorine pesticides in soil is a relatively common type of soil detection. The existing extraction methods of organochlorine pesticides in soil and sediment are mainly the following: solution extraction method, microwave extraction method and accelerated fluid extraction method. The s...
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IPC IPC(8): G01N1/28
CPCG01N1/286G01N2001/2866
Inventor 刘艾丽杜杰王丽山王浩阳婷张颖
Owner 中科检测技术服务(重庆)有限公司