Method for simultaneously detecting multiple types of persistent organic pollutants in water body

A persistent and organic technology, which is applied in the detection field of persistent organic substances, can solve the problems of high detection difficulty and technical difficulty, and achieve good elution effect

Inactive Publication Date: 2019-06-07
SHENZHEN ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the existing technologies only focus on the detection of a specific kind of POPs, and there is no method for simultaneous detection of multiple types of POPs. In addition, due to the different structures of different types o

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  • Method for simultaneously detecting multiple types of persistent organic pollutants in water body
  • Method for simultaneously detecting multiple types of persistent organic pollutants in water body
  • Method for simultaneously detecting multiple types of persistent organic pollutants in water body

Examples

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Embodiment 1

[0029] (1) Sample collection: the amber glass bottle was first washed with distilled water, then soaked in potassium dichromate solution for 24 hours, rinsed with ultrapure water, and dried at 250°C for 2 hours. After cooling, the sample was collected on site. Store at ℃ and return to the laboratory as soon as possible.

[0030] (2) Sample pretreatment: After the collected water sample is filtered through a 0.45μm glass fiber filter membrane (GF / F Whatman), take 1000mL of the filtrate into a 1000mL brown bottle, add 5mL of methanol to mix, and then add 20μL of 1μg / mL standard substitute PCB28F, 50 μL 1 μg / mL internal standard.

[0031](3) Solid-phase extraction: pretreat the C18 solid-phase extraction column with 5mL n-hexane, 5mL acetone and 10mL ultrapure water in sequence, and introduce the above 1000mL samples into the solid-phase extraction instrument at a speed of 5-6ml / min Carry out extraction; after all the samples pass through the solid-phase extraction column (keep...

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Abstract

The invention discloses a method for simultaneously detecting multiple types of persistent organic pollutants in a water body. The persistent organic pollutants comprise polychlorinated biphenyl, polybrominated diphenyl ethers and polycyclic aromatic hydrocarbon. The method comprises the following steps: (1) sample pre-treatment is conducted, specifically, a to-be-detected water sample is taken to be filtered, standard substitutions and internal standard substances of the persistent organic pollutants are added to be evenly mixed, and a pretreated water sample is obtained; (2) solid-phase extraction is conducted, specifically, the pretreated water sample is guided into a solid-phase extraction column to be subjected to solid-phase extraction, and the solid-phase extraction column is driedand eluted through eluents, namely n-hexane and acetone; (3) purification is conducted, specifically, dried eluate is purified through a Florisil column; (4) gas chromatography-mass spectrometry combined detection is conducted; and (5) the content of the persistent organic pollutants is calculated. By selecting the appropriate eluents and adopting a triple quadrupole gas chromatography-mass spectrometry combined instrument, the polychlorinated biphenyl, the poly brominated diphenyl ethers and the polycyclic aromatic hydrocarbon are simultaneously detected, the detection limits are all low, and the method has great significance in the field of persistent organic pollutant detection.

Description

technical field [0001] The invention relates to the field of detection of persistent organic substances, in particular to a method for simultaneously detecting multiple types of persistent organic substances in water bodies. Background technique [0002] There are many kinds of organic chemicals involved in industrial and agricultural production and human activities, such as polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), polycyclic aromatic hydrocarbons (PAHs) and so on. Although the concentration of these substances in the environment is low, they are highly toxic and difficult to degrade, and have long-term and strong toxic effects on aquatic organisms and human bodies, which have attracted widespread attention at home and abroad. [0003] At present, PCBs, PBDEs, PAHs and other trace organic substances have been detected in various environmental media and human bodies in many European and American countries. With the rapid expansion of cities, r...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
Inventor 朱婷婷邓臣胡蓉
Owner SHENZHEN ACAD OF ENVIRONMENTAL SCI
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