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61,005 resultsShowing papers similar to Test Method for Determination of Microplastics Particle and Fiber Size, Distribution, Shape, and Concentration in Waters with High to Low Suspended Solids Using a Dynamic Image Particle Size and Shape Analyzer
ClearTest Method for Determination of Microplastics Particle and Fiber Size, Distribution, Shape, and Concentration in Waters with High to Low Suspended Solids Using a Dynamic Image Particle Size and Shape Analyzer
This document is another version of the ASTM standard test method for determining microplastic particle and fiber size, distribution, shape, and concentration in water using dynamic image particle analysis (same as 45524 and 45910). Standardized methods like this are essential for producing data that can be compared across different studies and monitoring programs worldwide.
Test Method for Determination of Microplastics Particle and Fiber Size, Distribution, Shape, and Concentration in Waters with High to Low Suspended Solids Using a Dynamic Image Particle Size and Shape Analyzer
This ASTM standard describes a test method using dynamic image particle analysis to measure microplastic particle size, shape, and concentration in water samples with varying levels of suspended solids. The method provides quantitative characterization of microplastic physical properties. Standardized test methods are essential for producing comparable microplastic data across laboratories and monitoring programs.
Standard Practice for Development of Microplastic Reference Samples for Calibration and Proficiency Evaluation in All Types of Water Matrices with High to Low Levels of Suspended Solids
This ASTM standard practice describes procedures for creating reference microplastic samples to calibrate and validate detection methods in water matrices with varying levels of suspended solids. Standardized reference materials are essential for ensuring that different labs and methods produce comparable, reliable results. Consistent calibration tools are a prerequisite for building a credible global dataset on microplastic contamination in water.
Standard Practice for Development of Microplastic Reference Samples for Calibration and Proficiency Evaluation in All Types of Water Matrices with High to Low Levels of Suspended Solids
This ASTM standard practice provides procedures for creating reference microplastic particle samples for use in calibrating and evaluating microplastic detection methods. Standardized reference materials are essential for ensuring that different laboratories produce consistent and comparable microplastic measurement results.
Standard Test Method for Identification of Polymer Type and Quantity of Microplastic Particles and Fibers in Waters with High to Low Suspended Solids Using Pyrolysis-Gas Chromatography/Mass Spectrometry
Researchers developed and standardized a pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) test method for identifying and quantifying microplastic polymer types and quantities across waters with varying suspended solids levels. The standard addresses the growing recognition of polymeric organic compounds as contaminants in drinking water, wastewater, surface water, groundwater, and marine waters.
A reference methodology for microplastic particle size distribution analysis: Sampling, filtration, and detection by optical microscopy and image processing
This study developed a reference methodology for measuring microplastic particle size distributions in natural water, covering sampling, filtration, optical microscopy, and image processing. The authors showed that sample preparation steps and filtration materials significantly affect size distribution measurements across multiple orders of magnitude.
Identification Tools of Microplastics from Surface Water Integrating Digital Image Processing and Statistical Techniques
This study demonstrated that digital image analysis can automate and improve the characterization of microplastic particles collected from river water, capturing detailed shape, color, and size data that manual microscopy cannot easily achieve at scale. Better identification tools like this are essential for standardizing microplastic monitoring across different waterways and research groups.
Standard Test Method for Identification of Polymer Type and Quantity of Microplastic Particles and Fibers in Waters with High to Low Suspended Solids Using Pyrolysis-Gas Chromatography/Mass Spectrometry
This paper describes the development of an ASTM standard test method using pyrolysis–gas chromatography/mass spectrometry (Py-GC/MS) to identify and quantify specific polymer types in microplastic particles and fibers across a wide range of water types, from drinking water to marine water. Standardizing how microplastics are measured is a critical step toward producing comparable data across studies and enabling consistent regulatory monitoring. A validated, accepted method like this helps close the large gaps in microplastic data that currently hinder risk assessment and policy-making.
Preparation of a reference material for microplastics in water—evaluation of homogeneity
Researchers developed a candidate reference material for microplastics in water and evaluated its homogeneity, finding it suitable for use in laboratory intercomparison studies and as a tool for validating microplastic analytical methods.
Microplastics in Water Resources: Threats and Challenges
This review synthesizes current knowledge on microplastic pollution in aquatic environments, covering contamination sources, characteristic parameters like size, shape, and color, and the most effective analytical methods for detection. The study provides practical guidance on extraction and identification techniques while highlighting existing inaccuracies and limitations in the field of microplastic analysis.
Adding depth to microplastics for particle characterization and assessing settling behavior
Researchers developed a method for 3D characterization of microplastic particles to obtain volume and shape data beyond conventional 2D image analysis, improving accuracy in predicting settling behavior and estimating particle mass. Three-dimensional characterization was shown to substantially improve estimates of microplastic transport and sedimentation in water systems.
Influence of Shape on Heteroaggregation of Model Microplastics: A Simulation Study
This simulation study examined how the shape of microplastic particles (spheres vs. fibers vs. fragments) affects how they clump together (heteroaggregate) with natural organic matter in water. Particle shape influences how far microplastics travel, where they settle, and how available they are to aquatic organisms.
Large Scale Microplastic Fibre Analysis in Wastewater: A Comprehensive Review and Recommendations
This review critically analyzes current and emerging methods for identifying and quantifying microplastic fibers in wastewater, covering sample collection, pretreatment, and analytical techniques. The authors note that there are currently no universally accepted standards for collecting and analyzing microplastic fibers specifically, and that most existing methods were designed for microplastics in general. The study provides recommendations for developing standardized large-scale fiber analysis protocols for wastewater monitoring.
A review of microplastics measuring methods in water and wastewater bodies
This review covers the wide variety of methods used to measure microplastics in water and wastewater, comparing their advantages and limitations. The authors note that lack of standardized methods makes it difficult to compare results across studies and call for international consensus on measurement protocols.
Sorting microplastics from other materials in water samples by ultra-high-definition imaging
Researchers used a commercial particle analyzer with ultra-high-definition imaging to sort and identify microplastic particles in water samples. The device successfully distinguished between different plastic types based on how light scatters through or off their surfaces, and could separate microplastics from air bubbles and other non-plastic particles. The study demonstrates a relatively fast and accessible method for characterizing microplastic contamination in water.
Advanced Particle Size Analysis in High-Solid-Content Polymer Dispersions Using Photon Density Wave Spectroscopy
Not relevant to microplastics research; this paper develops a new spectroscopic method for measuring the size of polymer nanoparticles in concentrated industrial dispersions, focused on manufacturing quality control rather than environmental microplastic pollution.
Adding depth to microplastics for particle characterization and assessing settling behavior
This study developed methods to characterize microplastics in three dimensions rather than the conventional two-dimensional approach, obtaining volume and shape data that improves predictions of how particles settle and transport in water systems. Three-dimensional characterization significantly improved settling rate predictions compared to 2D image-based estimates.
Advanced analytical techniques for assessing and detecting microplastic pollution in water and wastewater systems
This review evaluates the various laboratory methods available for detecting and measuring microplastics in water and wastewater, including spectroscopy, thermal analysis, and newer combined techniques. Each method has different strengths and limitations in terms of what particle sizes they can detect and how accurately they identify plastic types. The review helps researchers choose the right tools for measuring microplastic contamination, which is essential for understanding how much microplastic people are exposed to through drinking water.
Quantification of Very Low Concentrations of Colloids with Light Scattering Applied to Micro(Nano)Plastics in Seawater
Researchers evaluated static and dynamic light scattering techniques for detecting and quantifying colloidal microplastic and nanoplastic particles (0.1-0.8 micron diameter) at very low concentrations in marine water, demonstrating their potential as rapid, non-destructive monitoring tools.
Improved Settling Velocity for Microplastic Fibers: A New Shape-Dependent Drag Model
A new shape-dependent drag model was developed to improve the accuracy of settling velocity predictions for microplastic fibers, addressing a major limitation of existing drag models that significantly underpredict fiber settling in aquatic environments.
A critical analysis on the limits and possibilities of the μ-Raman as a routine method for microplastics determination in drinking water
This critical analysis examined the limits and practical possibilities of micro-Raman spectroscopy as a routine tool for microplastic identification, assessing throughput, detection limits, and the conditions under which it provides reliable polymer characterization.
A practical primer for image-based particle measurements in microplastic research
This paper provides a practical guide for researchers to measure the size and shape of microplastic particles using image-based methods, proposing standardized metrics and workflows aligned with international guidelines. The authors recommend specific measurements for particle size and three shape descriptors that capture all relevant dimensions of particle shape. Standardizing how microplastics are measured is important because consistent data is needed to accurately assess the health risks these particles pose to ecosystems and humans.
Digital Image Analysis and Multivariate Data Analysis as Tools for the Identification of Microplastics in Surface Waters: The Case of the Vistula River (Central Europe)
Researchers demonstrated digital image analysis combined with microscopy as a tool for identifying and characterizing microplastic particles from Vistula River surface water samples, performing exhaustive quantitative and qualitative evaluation of 2D and 3D morphology to characterize MP abundance and composition.
Assessment of microplastic sampling and extraction methods for drinking waters
This study compared sampling and extraction methods for microplastics in drinking water, testing stainless steel filters, glass fiber filters, and centrifugal approaches, and finding substantial variation in recovery efficiency depending on particle size and method, underscoring the urgent need for standardized protocols to enable cross-study comparisons.