Underwater micro-plastic microscopic Raman in-situ measurement system

Abstract

The invention discloses an underwater micro-plastic microscopic Raman in-situ measurement system, which comprises a support frame, and a detection cabin, a filter cabin and a fluid control cabin which are arranged in the support frame, and the filter cabin is fixedly arranged below a detection window of the detection cabin and is connected with the fluid control cabin below the filter cabin through a pipeline. According to the scheme, the laser, the scanning galvanometer and the spectrograph are combined, so that Raman spectrum scanning detection on the micro-plastic is realized; the structure of the filtering cabin is specially designed to filter and enrich micro-plastic particles in water, and long-term, real-time and continuous in-situ measurement of the system is realized by adopting a mode that a small waterproof motor drives a filter screen to overturn and change a sample; besides, a detection mode of combining a microscopic Raman spectrum and an image is adopted, the morphology of the micro-plastic particles in the ocean is represented and the types of the micro-plastic particles are rapidly identified through the obtained spectrum information, and the system is ingenious in structural design and high in practical application value.

Description

technical field [0001] The invention belongs to the field of in-situ detection of marine water quality environment, and particularly relates to an in-situ measurement system for underwater microplastic micro-Raman. Background technique [0002] In recent years, due to the large-scale use and discharge of plastics, these plastics have been broken into microplastic particles by environmental effects and accumulated in the ocean, causing serious harm to the marine ecosystem. A large number of studies have shown that microplastics with a particle size of less than 5 mm are ubiquitous in the marine environment. As a new marine environmental problem, a rapid analysis and detection technology is urgently needed to objectively evaluate the distribution of microplastics in the global ocean and their potential impacts. [0003] At present, the identification and identification methods of microplastics mainly include spectroscopic analysis (FTIR, Raman) and thermal analysis (Py-GC-MS, ...

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Problems solved by technology

[0005] Aiming at the defects in the prior art that cannot meet the urgent demand for real-time, rapid and in-situ detection of microplastics in the marine field, the present invention proposes a microscopic Raman in-situ measurement system for underwater microplastics, which collects microplastics in water by filtration. Plastic particles, and then use the combination of Raman spectroscopy and microscopic imaging technology to realize real-time in-situ and rapid detection of microplastic particles in seawater

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