Identification and quantification of polyethylene microplastics with sulfur-doped carbon nanoparticles in fluorescence mode and construction of paper-based analytical method

Application of Eco-Friendly Fluorescent Dyes in Microplastic Detection

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Scientists tested safer, eco-friendly glowing dyes as a way to spot tiny plastic particles (microplastics) in samples, comparing them to the commonly used dye Nile Red. They found that the best dye and lighting combo depends on the type of plastic, for example, polypropylene (found in many food containers and packaging) was hardest to detect, while PET (used in bottles) was easiest. This matters because better, safer detection tools could help researchers more accurately track how much microplastic pollution surrounds us, which is an important step toward understanding its potential effects on our health.

Innovative portable microplastic detector using a continuous flow technique with fluorescence Nile red–graphene oxide

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Researchers developed a portable, semi-automated microplastic detection system combining continuous flow sample processing, Nile red/graphene oxide fluorescent staining with fourfold enhanced signal, and a handheld sensor, achieving reliable quantification of polyethylene down to 0.1 mg. The instrument's portability and speed could enable field-level microplastic monitoring in water supplies and environmental settings where laboratory analysis is impractical or unavailable.

Rapid and low-cost detection platform for micro- and nanoplastics

Fluorescence sensing of microplastics on surfaces

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Fluorescence techniques using Nile Red and pyrene as polarity probes can detect polystyrene microplastics directly on surfaces such as sand and sea salt, with a detection limit of approximately 0.2 micrograms per gram on sea salt. While relatively low in selectivity, this rapid method offers a practical tool for environmental screening and risk assessment of microplastic contamination in coastal and marine settings.

Analytical Methods for Plastic (Microplastic) Determination in Environmental Samples

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Significant gaps remain in understanding how microplastics distribute and move through the environment, largely because reliable, fast analytical methods for monitoring them are still lacking. Developing standardized detection techniques is essential for generating the consistent data needed to assess true exposure levels and health risks across different ecosystems.