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Classification of microplastics in living organism using color polarization camera
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Researchers developed a color polarization camera system to classify microplastics in living organisms, using polarization contrast imaging to distinguish plastic particles from biological tissue in vivo, enabling non-destructive detection of ingested MPs without sacrificing or chemically treating animals.
In recent years, marine pollution caused by the deterioration of plastic products and scrub particles, which are raw materials for cosmetics, has become a problem. There are concerns that microplastics discharged into the ocean are ingested by fish and other animals, and then accumulated in the human body, causing health problems. To solve this problem, methods for quantifying microplastics in seawater have been attracting attention. Recently, measurement methods under crossed Nicols and Raman spectroscopy have become mainstream. Each method has the advantage of being able to measure visually and accurately to the type, but a simpler and more accurate measurement method is required.Therefore, we focused on marine organisms that ingest microplastics. Plastics have birefringence. Taking advantage of this property, we use a color polarization camera to measure microplastics. This camera can determine the wavelength dispersion characteristics of birefringence with a single shot and also enables real-time measurement with video.
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This study used a full-Stokes polarization camera to visualize microplastics consumed by aquatic organisms by exploiting the birefringent optical properties of plastic particles. The method enables real-time detection and quantification of microplastics inside organisms without destructive sample preparation.
In-vivo measurement of ingested microplastics using spectroscopic and polarization-based full-Stokes microscopy
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Researchers measured the optical property called birefringence in five types of plastic particles (polystyrene, PET, LDPE, PMMA, and polypropylene) using a specialized polarization camera. Each plastic type showed a distinct birefringence signature, suggesting this technique could be used to identify and count different types of microplastics in biological tissue samples.
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Researchers developed a polarization digital holography approach for classifying microplastic particles based on their optical birefringence properties, requiring minimal sample preparation. The non-destructive method can distinguish microplastics from biological material by detecting how particles alter light polarization states.
Identification of microplastics in wastewater samples by means of polarized light optical microscopy
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Scientists tested polarized light optical microscopy as a rapid method for identifying microplastics in wastewater samples, finding it could distinguish synthetic polymer particles from natural debris based on their optical properties without requiring expensive spectroscopy equipment.
Real-time microplastic detection using polarization digital holographic microscope
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Researchers developed a real-time microplastic detection system using a polarization digital holographic microscope, enabling identification and characterization of MP particles in water based on their optical properties without the need for chemical staining or extensive sample preparation.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.