Method for determining phthalic anhydride in soil

A technology of phthalic anhydride and its determination method, which is applied in the field of chemical detection, can solve the problems that the research on the determination of soil and sediment residues is blank, and the research on the determination of residues is less

Pending Publication Date: 2022-02-18
河南广电计量检测有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the research on phthalic anhydride mainly focuses on the production technology of phthalic anhydride and the research on the application market of phthalic anhydride. There are few studies on its impact on the environment and the determination of residues in the environment, but the research on the determination of residues in soil and sediments still blank

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  • Method for determining phthalic anhydride in soil
  • Method for determining phthalic anhydride in soil
  • Method for determining phthalic anhydride in soil

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0047] Present embodiment provides a kind of assay method of phthalic anhydride in soil, comprises the following steps:

[0048] (1) Weigh 10.0g of quartz sand, add diatomaceous earth and anhydrous sodium sulfate, mix well and dehydrate, stir well until the mixture is in the form of loose particles, then add 2-fluorobiphenyl and phthalic anhydride stock solution to make The mass concentration of phthalic anhydride was 0.5 mg / L, and the beaker was shaken to mix 2-fluorobiphenyl, phthalic anhydride stock solution and the above mixture evenly to obtain sample 1;

[0049] (2) Put the sample 1 obtained in step (1) into the extraction cell, tighten the two ends of the extraction cell, then put it into the pressurized fluid extractor, heat the pressurized fluid extractor to 100°C, keep it for 5min, and then perform the extraction. Obtain extract; Wherein, the condition of extraction is: extraction time is 5min, and the volume of extraction solvent is 60% of extraction cell volume, an...

Embodiment 2

[0063] This example provides a method for the determination of phthalic anhydride in soil. The difference between this example and Example 1 is that in step (1), the mass concentration of phthalic anhydride is 1.0 mg / L.

[0064] In this embodiment, the assay results of phthalic anhydride are shown in Table 4.

[0065] Table 4

[0066]

Embodiment 3

[0068] This example provides a method for the determination of phthalic anhydride in soil. The difference between this example and Example 1 is that in step (1), the mass concentration of phthalic anhydride is 1.5 mg / L.

[0069] In this embodiment, the determination results of phthalic anhydride are shown in Table 5.

[0070] table 5

[0071]

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Abstract

The invention provides a method for determining phthalic anhydride in soil, which comprises the following steps: S1, adding a drying agent into the soil, uniformly mixing and dehydrating, performing stirring until a sample is in a granular shape, adding a substitute, and uniformly performing mixing to obtain a sample 1; S2, extracting the sample 1 by using a pressurized fluid extractor to obtain extract liquor; S3, concentrating, purifying and filtering the extracting solution to obtain a to-be-detected solution; S4, preparing a standard solution of the phthalic anhydride, detecting a response value of the phthalic anhydride by using a gas chromatography-mass spectrometer, and drawing a standard working curve by taking the mass concentration of the standard solution as a horizontal coordinate and the response value as a vertical coordinate to obtain a linear equation of the phthalic anhydride; and S5, performing qualitative and quantitative determination on the to-be-detected solution by using a gas chromatography-mass spectrometer in combination with the standard curve. According to the determination method, the content of phthalic anhydride in the soil can be determined, and the addition recovery rate of phthalic anhydride in the soil is high.

Description

technical field [0001] The invention relates to a method for determining phthalic anhydride in soil, and belongs to the technical field of chemical detection methods. Background technique [0002] Phthalic anhydride, also known as phthalic anhydride, is an important chemical raw material. Phthalic anhydride is used as a raw material in the paint industry, plastic manufacturing, pharmaceutical manufacturing and other industries, and the market demand is increasing day by day, which promotes the development of domestic phthalic anhydride production. Phthalic anhydride is an allergen. Long-term exposure to high concentrations of phthalic anhydride will increase the incidence of rhinitis and dermatitis, aggravate asthma, and increase serum zinc and specific immunoglobulin G levels. At present, the research on phthalic anhydride mainly focuses on the determination of the purity of phthalic anhydride, the determination of impurities in phthalic anhydride by different methods such...

Claims

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Application Information

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IPC IPC(8): G01N30/06G01N30/88
CPCG01N30/06G01N30/88
Inventor陈三娜高帅鹏刘新于玉娜钟顺发侯林闻静
Owner河南广电计量检测有限公司