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Extracting and measuring method of perfluorinated compounds in bark and leaves

A technology for perfluorinated compounds and determination methods, applied in the field of extraction and determination of perfluorinated compounds, can solve the problems of complex detection and extraction process, low precision, low accuracy of analysis results, etc., and achieves simple and easy pretreatment process and precision Good and maneuverable effect

Inactive Publication Date: 2014-12-24
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This patent detects PFCs in dairy products, but compared with the extraction of dairy products, the extraction and detection of PFCs in bark and leaves has a wider testing range, but the current detection and extraction process of PFCs is more complicated and the precision is high. low, and the accuracy of the analysis results is low

Method used

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  • Extracting and measuring method of perfluorinated compounds in bark and leaves
  • Extracting and measuring method of perfluorinated compounds in bark and leaves
  • Extracting and measuring method of perfluorinated compounds in bark and leaves

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Embodiment 1

[0037] The above and other technical features and advantages of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0038] Such as figure 1 Shown, it is the flowchart of extraction and determination method of perfluorinated compound in bark and leaf of the present invention, concrete steps are:

[0039] Step 1, bark and leaf are carried out pretreatment, concrete steps are as follows:

[0040] Step 11, distribute the bark and leaf samples collected according to the environmental monitoring requirements, and clean the surface to remove visible impurities or pollutants such as surface soil;

[0041] Step 12, after the cleaned sample is freeze-dried, it is ground and pulverized under a nitrogen environment, passed through a 60-mesh sieve, and stored at -20°C for future use;

[0042] This preprocessing process is simple and easy.

[0043] Step 2, extraction of perfluorinated compounds in bark and leaves, the specific ste...

Embodiment 2

[0064] The concrete process of extraction and determination method of perfluorinated compounds in bark and leaves of the present invention is:

[0065] Step 1, bark and leaf are carried out pretreatment, concrete steps are as follows:

[0066] Step 11, distribute the bark and leaf samples collected according to the environmental monitoring requirements, and clean the surface to remove visible impurities or pollutants such as surface soil;

[0067] Step 12, after the cleaned sample is freeze-dried, it is ground and pulverized under a nitrogen environment, passed through a 60-mesh sieve, and stored at -20°C for future use. This pretreatment process is simple and easy. .

[0068] Step 2, extraction of perfluorinated compounds in bark and leaves, the specific steps are as follows:

[0069] Step 21, add the pretreated sample to the internal standard for aging, then add the extractant, perform ultrasonic extraction and vibration extraction in sequence, and then centrifuge to colle...

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Abstract

The invention relates to an extracting and measuring method of perfluorinated compounds in bark and leaves. The extracting and measuring method comprises the following three steps: (1) pre-treating the bark and leaves; (2) extracting the perfluorinated compounds in the bark and leaves; and (3) measuring the amount of the perfluor compounds in the collected filtrate by using a liquid chromatography-mass spectrometry analysis method. According to the extracting and measuring method, the process of pre-treatment is simple and feasible; the extraction process only comprises ultrasonic generation, oscillation and centrifugation and is simple and fast; the solid phase extraction technique is used for extracting, concentrating and purifying the sample; the use amount of organic solvent is small during extraction; the extraction is fast and safe; an extraction column adopts a vacuum groove design capable of preventing cross pollution and atomizing; the quality is stable; the sample recycling rate is high and the accuracy is good.

Description

technical field [0001] The invention relates to the field of environmental testing, in particular to a method for extracting and measuring perfluorinated compounds in bark and leaves. Background technique [0002] Perfluorinated compounds (PFCs) are a class of fluorine-containing organic compounds. Due to their good hydrophobicity and oleophobicity, they are widely used in the manufacture of corrosion inhibitors, fire extinguishing agents, decontamination agents and many other commodities, as well as papermaking, textiles and many other industry sector. [0003] PFCs and their derivatives all contain C-F covalent bonds with high bond energy, which can withstand photolysis, pyrolysis, microbial metabolism, and higher vertebrate metabolism without degradation, resulting in different media (air, water, sediment, etc.) substances and organisms) and in different countries and regions have different concentrations detected. In the study of PFCs toxicity, it was found that many P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06
Inventor 郭昌胜徐建张远王凯吕佳佩
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI