Progress in the research of fast analyzer for orga

  • Detail

Research Progress on rapid analyzer of environmental organic pollutants

the residual organic pollutants in the environment pollute soil, crops, surface water and groundwater, and their environmental behavior has become a hot spot in the research field, which puts forward higher requirements for the detection technology of organic pollutants. At present, color mass spectrometry is mostly used in detection, which has many problems, such as long sample collection and transportation time, cumbersome pretreatment process, long analysis cycle and so on. In order to solve the above problems, researchers have developed organic pollutant detection technologies such as high-efficiency enrichment technology and high-throughput detection technology. These new technologies mark the development trend of organic pollutant detection and become the key factor affecting the research on the environmental behavior characteristics of organic pollutants

Wang Yanhong, a researcher at Shenyang Institute of Applied Ecology, Chinese Academy of Sciences, has been committed to the research and development of detection technology for a long time, and led the team to carry out the research and development of new methods and devices for the detection of organic pollutants based on molecular imprinting sensing technology, with a view to developing accurate and convenient rapid analysis instruments for environmental organic pollutants. The team has researched and developed technologies or materials such as molecularly imprinted solid-phase extraction column, molecularly imprinted membrane electrode, molecularly imprinted array sensor card and molecularly imprinted photonic crystal sensor card for organic pollutants in the early stage. Relevant technical materials have been successfully applied to the rapid detection of a variety of organic pollutants, published 12 papers and applied for 4 patents

recently, the team made new progress in the research of organic pollutant detection technology, and developed a high-throughput detection method that integrates molecular imprinting technology, quantum dot coding technology and flow microsphere dynamometer, which have many reasons for friction resistance. In this method, the molecular imprinted microspheres decorated with quantum dots are used to construct the flow-through fluorescence sensing unit, and the specific adsorption of molecular imprinting technology is used to achieve the specific and efficient enrichment of organic pollutants. Through the adsorption of molecules and quantum dots, a quantitative fluorescence quenching reaction takes place on the surface of the sensing unit, and the flow technology is used to quickly and accurately collect the fluorescence signal of the sensing unit, so as to establish the correlation between the concentration of the substance to be measured and the fluorescence intensity, Realize high-throughput and rapid detection of organic pollutants in environmental samples

organic pollutants refer to pollutants composed of natural organic substances in the form of carbohydrates, proteins, amino acids and fats and some other biodegradable synthetic organic substances. It can be divided into natural organic pollutants and synthetic organic pollutants

in addition to inorganic pollutants, water also contains a large number of organic pollutants, which have an impact on the ecosystem in the form of toxicity and the reduction of dissolved oxygen in the water, endangering human health. Specific organic pollutants refer to those organic compounds that are highly toxic, highly cumulative, difficult to degrade and listed as priority pollutants, with many varieties and low content. Several of these substances are described below

volatile halogenated hydrocarbons mainly refer to trihalomethanes (chloroform, bromodichloromethane, dibromochloromethane, tribromomethane) and carbon tetrachloride. Various halogenated hydrocarbons have special odor and toxicity, and can enter the human body through skin contact, breathing or drinking water. Volatile halogenated hydrocarbons are widely used in chemical industry, medicine and laboratories, and their waste (sewage inlet is also low) water is discharged into the environment and pollutes the water body; Chloroform is also produced during chlorination and disinfection of drinking water

volatile organic compounds according to the definition of the World Health Organization (who), organic compounds (excluding organometallic compounds and organic acids) with a saturated vapor pressure greater than 0.13kpa under the standard condition of 3-propanol purity greater than 99.5% (273k, 101.325kpa) are volatile organic compounds. This kind of organic matter is numerous, mostly toxic, and widely distributed in the environment

polycyclic aromatic hydrocarbons (PAHs) polycyclic aromatic hydrocarbons often exist in water as complex mixtures, with strong bioaccumulation and persistence. They are the first class of compounds that have been proved to have carcinogenic effects through animal tests, and are priority pollutants

Copyright © 2011 JIN SHI