Method for detecting polycyclic aromatic hydrocarbon in high-flux soil

A detection method and technology for polycyclic aromatic hydrocarbons, which are applied in the field of detection of polycyclic aromatic hydrocarbons in large-flux soils, can solve the problems of long detection time and low detection efficiency, and achieve large batch processing capacity, fast water removal speed, and guaranteed concentration. effect of time

Inactive Publication Date: 2020-03-17
江苏新锐环境监测有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a method for detecting polycyclic aromatic hydrocarbons in large-flux soils, which is fast, economical and efficient, and

Method used

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  • Method for detecting polycyclic aromatic hydrocarbon in high-flux soil
  • Method for detecting polycyclic aromatic hydrocarbon in high-flux soil

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Experimental program
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Effect test

Embodiment 1

[0048] A method for detecting polycyclic aromatic hydrocarbons in high flux soil, including the following steps:

[0049] 1) Drying and extraction: Place the soil to be tested in a drying device for drying treatment, weigh 20g of the dried soil, add it to a 250ml brown glass bottle, add 10ug of 2-fluorobiphenyl substitute, and add 100ml Hexane-acetone mixture, cover with a Teflon gasket, shake and deflate, put the brown glass bottle filled with reagents into the overturning shaker, set the speed to 40 rpm, Turn over for 12 hours;

[0050] 2) Filtration and concentration process: Pour all the overturned samples into the funnel, filter through the funnel, collect the filtrate, wash the glass bottle with a mixture of n-hexane and acetone at least 3 times, combine the cleaning solution and collect it in the filtrate. The collected filtrate is concentrated by KD, the temperature of the water bath is 80℃, glass beads are added to the filtrate to prevent bumping, the height of the soluti...

Embodiment 2

[0061] In Example 2, the eluent used in the purification process is a dichloromethane-n-hexane mixed solvent. The mixing ratio of dichloromethane-n-hexane is 1:7. In the drying and extraction steps, the turning time of the turning vibrator is For 11 hours, during step 1) drying and extraction, and step 2) filtration and concentration, the mixing ratio of the n-hexane-acetone mixture is 1:2.

[0062] Other test conditions in this embodiment 2 are the same as those in embodiment 1, and will not be repeated here.

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Abstract

The invention discloses a method for detecting polycyclic aromatic hydrocarbon in high-flux soil. The method comprises the following steps: 1) drying and extracting: drying to-be-detected soil, weighing 20 g of treated soil and adding the soil into a 250 ml brown glass bottle, adding 10 [mu]g of a 2-fluorobiphenyl substitute, adding 100 ml of a 1:1 n-hexane-acetone mixed solution, covering a cover, carrying out shaking and air discharging and putting the brown glass bottle filled with a reagent into a turnover oscillator, and carrying out overturning; 2) filtering and concentrating: pouring the sample into a funnel, collecting filtrate, cleaning a glass bottle, merging the cleaning solution into the filtrate, carrying out KD concentration, performing water bath at 80 DEG C, when the when extracting solution is 5ml, transferring to extracting solution a nitrogen blowing instrument for nitrogen blowing to 2ml, carrying out concentrating to 0.5 ml, adding 4[mu]l of internal standard solution, and fixing the volume to 1.0 ml for detection; and 3) carrying out GC-MS method detection. The method is rapid, economical and efficient, and can meet the detection requirements of polycyclic aromatic hydrocarbons in the large-flux soil.

Description

Technical field [0001] The invention relates to a detection method for polycyclic aromatic hydrocarbons in large flux soils. Background technique [0002] Polycyclic aromatic hydrocarbons are a type of persistent organic pollutants. More than 200 PAHs have been discovered so far, 16 of which have strong teratogenic, carcinogenic, and mutagenic properties, and have become the priority control targets of the US Environmental Protection Agency EPA. And it has received extensive attention and research on a global scale. my country has also included 7 of these 16 PAHs in the blacklist of toxic organic pollutants for priority control and detection. [0003] PAHs are widely present in the atmosphere, water, soil and biological environment, and enter the human body through direct contact or the food chain, thereby endangering human health. In a variety of environmental media, soil bears more than 90% of the environmental load of PAHs, and most of these pollutants are concentrated in surfac...

Claims

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Application Information

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IPC IPC(8): G01N30/88G01N30/06G01N30/14G01N30/12
CPCG01N30/06G01N30/12G01N30/14G01N30/88G01N2030/045G01N2030/126G01N2030/8854
Inventor 那晶晶夏飞刘爱萍马亚娟
Owner 江苏新锐环境监测有限公司
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