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Papers
61,005 resultsShowing papers similar to Identification and quantification of microplastics in table sea salts using micro-NIR imaging methods
ClearAnalysis of microplastics in table salt by FT-IR microscopy
This Japanese-language study used FT-IR microscopy to detect microplastics in three brands of Japanese sea salt, finding polypropylene and polyethylene particles above 20 micrometers in all samples. The study demonstrates that sea salt produced from different coastal regions already contains microplastics, representing a direct dietary exposure pathway.
Identification and quantification of common microplastics in table salts by a multi-technique-based analytical method
Researchers developed a multi-technique analytical method combining microscope-FTIR and pyrolysis-GC/MS to identify and quantify microplastics in table salts, providing 3D information on polymer type, morphology, and chemical composition of food-grade salt contaminants.
Detection of Microplastic in Sun-Dried Salt using Spectroscopic Technique
Researchers used spectroscopic techniques to detect microplastics in sun-dried sea salt from South Korea. Microplastics were found in the salt samples, confirming that sea salt produced from ocean water is a pathway through which humans can ingest plastic particles through everyday food consumption.
Identification and quantification of microplastics in salts by complementary approaches using pyrolysis-gas chromatography/quadrupole-time of flight mass spectrometry (Py-GC/QTOFMS) and laser direct infrared (LDIR) chemical imaging analysis
Researchers used complementary analytical approaches, including pyrolysis-gas chromatography with mass spectrometry and laser direct infrared imaging, to identify and quantify microplastics in table salt. The study provides improved mass concentration data for different polymer types and sizes of plastic particles contaminating salt products worldwide.
Development of a Near-Infrared Imaging System for Identifying Microplastics in Water
Researchers developed a near-infrared imaging system capable of automatically identifying and characterizing microplastics suspended in water, successfully obtaining material identification images without the manual sorting typically required by conventional methods.
Detection of microplastics in sea salt using hyperspectral imaging and machine learning methods: Pollution control in the Mediterranean sea as a case study
Hyperspectral imaging combined with machine learning was used to detect and classify microplastics in Mediterranean sea salt samples, demonstrating a rapid, non-destructive analytical approach with potential for routine quality control in the food industry.
Investigating the Correlation of Microplastic Pollution Between Seawater and Marine Salt Using Micro-Raman Spectroscopy
Micro-Raman spectroscopy was used to investigate the correlation between microplastic contamination in seawater and marine salt from the same source waters, finding that the polymer profiles of microplastics in salt broadly reflect those in the seawater from which the salt was produced.
A sustainable analytical workflow for microplastic detection and typification via NIR-HSI: Validation through sea salt analysis
Researchers developed a sustainable analytical workflow for detecting and classifying microplastics using near-infrared hyperspectral imaging combined with chemometrics. The study validated the method through sea salt analysis, demonstrating a rapid, non-destructive, and solvent-free approach that aligns with green analytical chemistry principles for environmental microplastic monitoring.
Quantitative and qualitative evaluation of microplastics in different salts from Iran
Researchers analyzed microplastic concentrations in fifteen samples of crystallized, refined sea, unrefined sea, and rock salts from Iranian markets using scanning electron microscopy and micro-Raman spectroscopy, finding microplastic contamination across all salt types with concentrations varying by processing method.
An effective strategy for the monitoring of microplastics in complex aquatic matrices: Exploiting the potential of near infrared hyperspectral imaging (NIR-HSI)
Researchers developed a near infrared hyperspectral imaging (NIR-HSI) method for rapid monitoring of microplastics in complex marine matrices, demonstrating effective detection and polymer identification that overcomes the time and cost limitations of conventional spectroscopic analysis approaches.
Rapid and direct detection of small microplastics in aquatic samples by a new near infrared hyperspectral imaging (NIR-HSI) method
Researchers developed a rapid near-infrared hyperspectral imaging method capable of detecting and chemically identifying small microplastics (down to a few hundred micrometers) in aquatic samples faster and with less labor than traditional spectroscopy approaches.
Application of High-Resolution Near-Infrared Imaging Spectroscopy to Detect Microplastic Particles in Different Environmental Compartments
Researchers enhanced a lab-based near-infrared imaging spectroscopy setup with a microscopic lens to detect microplastic particles as small as 100 micrometers across multiple environmental sample types, significantly speeding up analysis compared to traditional methods. Faster, semi-automated detection tools are essential for scaling up environmental monitoring of microplastics, which currently requires labor-intensive laboratory work.
A comprehensive and fast microplastics identification based on near-infrared hyperspectral imaging (HSI-NIR) and chemometrics
Researchers developed a near-infrared hyperspectral imaging method combined with chemometric analysis for rapid, high-throughput identification of microplastic types in mixed samples, achieving high classification accuracy and offering a faster alternative to FTIR and Raman methods for routine monitoring.
Polymer Type Identification of Marine Plastic Litter Using a Miniature Near-Infrared Spectrometer (MicroNIR)
Researchers tested a miniature near-infrared spectrometer (MicroNIR) for rapidly identifying polymer types in marine plastic litter collected from beaches, finding it could accurately distinguish common plastics like polyethylene and polypropylene. Low-cost, portable identification tools are important for large-scale monitoring of marine plastic pollution.
A comprehensive pyrolysis-gas chromatography/mass spectrometry analysis for the assessment of microplastics in various salts
Scientists measured microplastic contamination in different types of edible salt using advanced chemical analysis and found that sea salt contained the most microplastics, roughly 17 times more than rock salt. Polyethylene, polypropylene, and PET made up the vast majority of particles found, and some contamination came from the salt packaging itself. Based on average salt consumption, a person using sea salt could be exposed to over 2,300 micrograms of microplastics per year through salt alone.
Development of a rapid detection protocol for microplastics using reflectance-FTIR spectroscopic imaging and multivariate classification
Reflectance-FTIR spectroscopy was evaluated as a faster and more automated detection method for microplastics in environmental samples, with results showing strong potential for high-throughput screening. The method could reduce the time and cost of routine microplastic monitoring programs.
Rapid shipboard measurement of net-collected marine microplastic polymer types using near-infrared hyperspectral imaging
Researchers developed a rapid near-infrared hyperspectral imaging method for identifying polymer types in ship-collected marine microplastic samples, achieving results in minutes compared to hours for conventional methods and enabling higher-throughput ocean monitoring.
Comparison of Raman and Fourier Transform Infrared Spectroscopy for the Quantification of Microplastics in the Aquatic Environment
Microplastics from North Sea surface waters were analyzed by both Raman and FTIR spectroscopy across two size fractions, with automated Raman quantifying approximately twice as many particles ≤500 μm as FTIR imaging, but similar results for larger particles. The comparison study identifies key trade-offs between the two techniques and demonstrates that method choice significantly affects microplastic abundance estimates.
Microplastics in Table Salts: Sources, Abundance, Types, and Consumption– A Review
This global review synthesizes research on microplastic contamination in table salts, examining sources, abundance, particle types, and estimated human consumption, finding that sea salts tend to have higher microplastic loads than rock or lake salts.
Quantifying ecological risks of aquatic micro- and nanoplastic
This study analyzed microplastic contamination in table salts from multiple countries and found plastic particles present in the vast majority of samples tested. Sea salt contained the highest levels of microplastics compared to rock and lake salts, reflecting the extent of marine plastic pollution. The findings suggest that table salt is a previously underappreciated pathway for human microplastic ingestion, with estimated annual intake varying by geographic region.
Material identification and imaging of microplastics when dispersed in water using near-infrared light toward combination with a flow cell
Researchers developed a near-infrared (NIR) spectroscopy method for identifying and imaging microplastics in water without requiring drying, testing it on polyethylene, polypropylene, polystyrene, and polymethyl methacrylate particles. The method was designed to integrate with a flow cell for continuous measurement, enabling real-time microplastic identification in water samples.
Quantification and characterization of microplastics in surface water samples from the Northeast Atlantic Ocean using laser direct infrared imaging
Researchers quantified microplastics in Northeast Atlantic Ocean surface waters using laser direct infrared imaging, detecting particles down to 20 micrometers and revealing microplastic concentrations and polymer compositions across eight sampling locations.
Detection of Microplastic in Salts Using Terahertz Time-Domain Spectroscopy
Researchers demonstrated that terahertz spectroscopy can detect microplastics embedded in table salt at different concentrations. This technology could offer a new non-destructive method for screening food products for microplastic contamination.
Microplastic contamination of salt intended for human consumption: a systematic review and meta-analysis
This systematic review and meta-analysis examined microplastic contamination in table salt from around the world. It found that microplastics are present in most salt products intended for human consumption, with sea salt generally containing more particles than rock or lake salt, representing a consistent source of dietary microplastic exposure.