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61,005 resultsShowing papers similar to Prevalence of small-sized microplastics in coastal sediments detected by multipoint confocal micro-Raman spectrum scanning
ClearStudy on Rapid Recognition of Marine Microplastics Based on Raman Spectroscopy
Researchers developed a rapid identification system for marine microplastics using Raman spectroscopy, enabling quick determination of plastic type and size. Fast, accurate identification tools are critical for monitoring the growing problem of microplastic pollution in ocean environments.
Identification of Microplastics Using a Custom Built Micro-Raman Spectrometer
Researchers built a custom micro-Raman spectrometer and demonstrated its use for identifying microplastic polymer types in environmental samples, achieving sensitive and specific polymer identification at particle sizes down to a few micrometers.
Detection and analysis of microplastics in offshore sediment by microscopic differential Raman spectroscopy
Researchers developed a rapid microplastic detection system combining fluorescence imaging, differential Raman spectroscopy, and confocal microscopic Raman technology using a dual 784/785 nm wavelength laser to overcome limitations of weak Raman signals and fluorescence interference, testing it on polycarbonate and high-density polyethylene particles in offshore sediments from Qingdao Shilaoren coastal waters.
Design of a confocal micro-Raman spectroscopy system and research on microplastics detection
Researchers built a custom confocal micro-Raman spectroscopy system designed to detect microplastics more cost-effectively than commercial instruments. The improved signal quality enables more accurate identification of plastic polymer types in environmental samples.
Microplastic identification using Raman microsocpy
Researchers developed and implemented a Raman spectroscopy system for rapid detection and identification of microplastic particles on substrates. The system enables efficient chemical characterization of microplastics found across diverse environmental matrices including ocean, lakes, soil, beach sediment, and human blood.
Metagenomics reveals the influence of small microplastics on microbial communities in coastal sediments
Researchers used high-throughput metagenomic sequencing and micro-Raman spectrometry to study how small microplastics (under 100 um) influence microbial communities in coastal sediments of Hangzhou Bay, China. Results revealed distinct microbial community shifts associated with small microplastic presence, an effect often overlooked due to measurement challenges at small particle sizes.
Rapid MicroplasticDetection Using High-ThroughputScreening Raman Spectroscopy
Researchers developed a high-throughput screening Raman spectroscopy system for rapid microplastic detection, overcoming the traditional tradeoff between spatial resolution, field of view, and analytical throughput to enable faster identification of plastic particles across environmental samples with low concentrations.
Presence of Microplastics in Estuarine Environment- A Case Study from Kavvayi and Kumbla Backwaters of Malabar Coast, Kerala, India
Researchers detected microplastics as small as 500 nanometers in sediments and bottom-dwelling organisms from two estuaries on India's Malabar Coast, using confocal Raman spectroscopy to identify polymer types and documenting contamination across all sampled sites.
A “six-point S-shaped” sampling strategy based on micro-Raman spectroscopy enabling the rapid and accurate detection of small-sized microplastics in soil
A new six-point S-shaped sampling strategy combined with micro-Raman spectroscopy was developed to more accurately detect and quantify microplastics in environmental samples. The approach improves spatial coverage and reduces sampling bias, making microplastic monitoring more reliable and reproducible.
Detection of microplastics based on spatial heterodyne Raman spectroscopy
Researchers developed a spatial heterodyne Raman spectroscopy method for detecting microplastics, offering advantages over existing techniques by reducing detection time, lowering false detection rates, and using more affordable equipment.
Full size microplastics in crab and fish collected from the mangrove wetland of Beibu Gulf: Evidences from Raman Tweezers (1–20 μm) and spectroscopy (20–5000 μm)
Researchers combined Raman Tweezers (for particles 1-20 µm) and conventional Raman spectroscopy (for 20-5000 µm) to characterise the full size spectrum of microplastics in crab and fish from the Beibu Gulf mangrove wetland in China. They found that small microplastics (1-20 µm) comprised 35.77% of total particle counts, and that excluding this size fraction introduces large underestimates of total microplastic burden in marine organisms.
Raman Microspectroscopy: Improvement in Signal Generation and Collection to Facilitate Raman Spectroscopy
Advances in Raman microspectroscopy were reviewed for improving signal generation and analysis in microplastic identification, including new detector designs and data processing algorithms. Enhanced Raman spectroscopy capabilities enable faster and more accurate polymer identification at smaller particle sizes.
Assessment of filter subsampling and extrapolation for quantifying microplastics in environmental samples using Raman spectroscopy
A subsampling method for Raman spectroscopic analysis of microplastics on laboratory filters was validated, finding that scanning just 12.5% of the filter area in a wedge pattern provided accurate and efficient estimates of whole-filter microplastic counts in sediment samples.
How to Identify and Quantify Microplastics and Nanoplastics Using Raman Imaging?
This paper reviews advances in Raman imaging as a method for identifying and quantifying microplastics and nanoplastics in environmental samples, discussing current protocols, analytical challenges, and the need for standardization.
Fast compressive Raman micro-spectroscopy to image and classify microplastics from natural marine environment
Researchers developed a fast compressive Raman micro-spectroscopy system for imaging and classifying microplastics on filters, achieving significant speed improvements over conventional point-scanning Raman methods. The system correctly identified polymer types in heterogeneous real-world samples, offering a practical tool for routine microplastic monitoring in water and sediment samples.
Application of Raman microspectroscopy for the characterization of microplastics in clam Chamelea gallina
Researchers developed an extraction and filtration protocol using Raman microspectroscopy to characterize microplastics down to 1 μm in the clam Chamelea gallina, optimizing filter selection based on recovery rate, filtration time, readability, and cost.
Surface-Enhanced Raman Spectroscopy Facilitates the Detection of Microplastics <1 μm in the Environment
Researchers developed a method using surface-enhanced Raman spectroscopy to detect and identify individual microplastic particles smaller than one micrometer. This technique addresses a major gap in environmental monitoring, since most current methods cannot reliably detect the smallest microplastics that may pose the greatest risk due to their ability to enter cells and tissues.
Quantitative and Qualitative Differences of Common Microplastic Detection Procedures: Nile Red- assisted Fluorescence Microscopy and Confocal Micro-Raman Spectroscopy
Researchers compared Nile Red-assisted fluorescence microscopy and confocal micro-Raman spectroscopy for microplastic detection, finding an overall percentage difference of 421% between methods, with better agreement at smaller particle sizes and Raman spectroscopy offering superior ability to distinguish microplastics from organic matter.
Visualization and characterisation of microplastics in aquatic environment using a home-built micro-Raman spectroscopic set up
Researchers built an affordable micro-Raman spectroscopy system capable of identifying microplastics in water samples, offering a low-cost alternative to expensive commercial equipment. The system could visualize, measure, and chemically identify different types of microplastic particles. This kind of accessible detection technology is important, especially for developing countries, because widespread monitoring of microplastic pollution in water sources is essential for protecting public health.
Rapid identification of micro and nanoplastics by line scan Raman micro-spectroscopy
Researchers developed a faster Raman spectroscopy tool for identifying microplastic particles by scanning a line rather than a single point at a time, improving imaging speed by 10 to 100 times over conventional methods. This allows the same chemical identification and size characterization of microplastics across large sample areas in a fraction of the time. Faster analysis methods are critical for processing the large numbers of samples needed in environmental monitoring programs.
Raman Imaging Spectroscopy: History, Fundamentals and Current Scenario of the Technique
This review covers the history and principles of Raman imaging spectroscopy, a technique increasingly used to identify and map the chemical composition of microplastics in environmental samples. The review provides technical context for one of the most important tools in microplastic analysis.
Ubiquity of microplastics in coastal seafloor sediments
Researchers applied a novel method to quantify microplastic concentrations in seafloor sediments from 42 coastal sites across southeastern Australia. They found microplastics in all samples at an average concentration of 3.4 particles per milliliter of sediment, predominantly as filaments. The study demonstrates that microplastic contamination of coastal seafloor sediments is ubiquitous and that hydrological and sediment properties influence deposition patterns.
Application of raman micro-spectroscopy for quantitative microplastics analysis
This review examines the application of Raman microspectroscopy for quantitative microplastic analysis, emphasizing the technique's ability to detect particles down to 1 micron - the smallest size range posing the highest environmental and health risk. The authors highlight Raman microspectroscopy's advantages over other methods for measuring microplastic concentrations across diverse environmental matrices.
Fluorescent labelling combined with confocal differential Raman spectroscopy to detect microplastics in seawater
Researchers combined fluorescent labeling with confocal differential Raman spectroscopy to develop a rapid method for detecting microplastics in near-shore seawater, achieving efficient removal of organic matter interference through optimized sample pretreatment. The system demonstrated accurate identification of multiple polymer types in complex seawater matrices.