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

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...

AI Technical Summary

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 of POPs, it is difficult to detect them simultaneously in the same detection system. It is technically difficult to detect multiple types of substances, especially when the content of the substance to be detected is in trace or trace amounts

Images