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    Home > Chemicals Industry > China Chemical > Invisible plastic particles have contaminated your dining table. Instrument testing needs development

    Invisible plastic particles have contaminated your dining table. Instrument testing needs development

    • Last Update: 2022-01-17
    • Source: Internet
    • Author: User
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      [ Focus on Chemical Machinery and Equipment Network ] As one of the commonly used materials in daily life, plastic not only brings convenience to people, but also causes damage to the environment.
    Plastic waste pollution known as "white pollution" has become an arduous challenge facing the global environment.
    In order to control white pollution, my country has been vigorously implementing the "plastic limit order and encouraging the use of degradable plastics.
    However, the harm caused by plastics is far more than white pollution.
    "

     
    Chemical machinery and equipment network hotspots pay attention to chemical machinery and equipment
      Recently, I learned that in Okinawa, researchers use optical tweezers and Raman microscopy to analyze collected particles.
    The combination of these two technologies is also one of the innovations of the research.
    In other previous studies, researchers may need optical tweezers technology to use lasers to fix particles in liquids, while Raman microscopy technology recognizes the unique molecular fingerprints of each particle.
    This allows researchers to accurately observe the presence of various substances, including organic materials, trace metals, polyethylene or polystyrene.

     

      It is reported that the researchers found plastic in all samples, of which more than 75% of the plastic is made of polyethylene.
    The researchers found plastic in all samples, of which more than 75% of the plastic is made of polyethylene.

     

      Also, in a study this month.
    The research team investigated the plastic particles contained in four mussel species.
    Some of these mussels were caught in the ocean, while others came from supermarkets and vegetable markets in different countries.
    The results showed that all the samples analyzed contained plastic microparticles, and a total of 9 different types of plastics were detected.
    Among them, polypropylene (PP) and polyethylene terephthalate (PET) are common.
    These two materials are used by humans.
    widely used.

     

      According to research, one gram of mussel meat contains 0.
    13 to 2.
    45 micron plastic particles.
    Mussel samples from the North Atlantic and South Pacific are heavily contaminated.
    This study shows that certain human foods have been contaminated by microplastics.

     

      So, what instruments and meters are there to help plastic identification ? At present, the commonly used identification techniques for microplastics are Fourier transform infrared spectroscopy and Raman spectroscopy.
    However, the two can only analyze individual particles during the inspection process, and it is necessary to visually identify suspicious microplastic particles before performing spectral analysis.
    The study of microplastics in environmental samples requires the analysis of a large number of particles, which leads to a lot of time-consuming detection.

     
    Instrumentation
      Hyperspectral imaging technology combines the traditional two-dimensional RGB image with spectroscopy, and determines the chemical properties of the substance represented by each pixel by linking the spectral characteristics of each spatial pixel on the image with the corresponding spatial information.
    Complete the detailed detection and classification of different samples.
    Compared with Fourier transform infrared spectroscopy and Raman spectroscopy, hyperspectral imaging technology can perform spectral analysis on a large number of samples at the same time, which* improves the detection efficiency, and can obtain other information such as the size, shape and abundance of microplastics.

     

      In addition, biological detection techniques can also be used, which mainly include immunoassays and biosensor detection methods.
    Immunoassays are based on the specific binding properties of antigens and antibodies, and can be widely used to monitor a variety of endocrine disrupting substances in water.
    The biosensor detection method is to use the specific reaction of immobilized biosensitive material with the target analyte for detection.
    Compared with chemical analysis methods, biological analysis methods are faster, less costly, and more portable.
    However, the application in detection is not mature enough, and a large-scale promotion and application still requires a lot of research work.

     
    sensor
      With the development of science and technology, high-tech products are also used to monitor plastic environmental pollution, which is expected to be combined with drones or high-resolution satellites to realize the monitoring of marine plastic garbage.

     

      Later, the editor would like to say that it is because of the wanton use of plastic by each of us that more and more "white garbage" are created.
    The idea of ​​"recruiting and leaving" plastics is not realistic.
    To solve the white pollution problem, only combining science and technology with the joint efforts of people is a feasible way.

     

      Original title: Invisible plastic particles have contaminated your dining table.
    Instrument testing needs to be developed
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