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Assessment of the Microplastics Content in Natural Waters and Sediments: Sampling and Sample Preparation
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This review examines the challenges of sampling and preparing water and sediment samples for microplastic analysis, highlighting the lack of standardized methods. Researchers found that differences in collection techniques, sample volumes, and processing steps make it difficult to compare results across studies. The study calls for an internationally agreed-upon analytical framework to improve the reliability and consistency of microplastic monitoring worldwide.
Aquatic ecosystems serve as the primary reservoir for microplastics entering the environment. The assessment of the microplastics content in natural waters and sediments is a pressing task, the resolution of which is essential for evaluating the degree of pollution of water bodies, identifying sources of contamination, and assessing potential risks to aquatic inhabitants. Currently, there is no universal analytical approach to separating microplastics from natural waters and sediments for subsequent identification. This review summarizes information on the methods for sampling microplastics from natural waters and sediments and sample preparation techniques, including size- and density-based particle separation methods, as well as digestion-based methods relying on the digestion of samples to remove natural organic matter. Additionally, it outlines the classification of microplastics and provides general insights into their prevalence in aquatic ecosystems and potential toxicity.
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Assessment of microplastic content in natural waters and sediments: sampling and sample preparation
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Researchers reviewed and evaluated sampling and analytical methods for measuring microplastic content in natural waters and sediments, assessing sources of error and variability in current approaches. The review recommended a standardized protocol to improve cross-study comparability.
Methods for Studying Microplastic Pollution in Natural Waters: Current State and Recommendations
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This methodological review addresses the lack of standardization in how scientists sample, process, and report microplastic contamination in natural waters, which makes it nearly impossible to compare results across studies. It details quality assurance and quality control steps — especially important given how easily tiny plastic particles contaminate samples from the lab environment itself — and provides concrete recommendations for sampling protocols and data reporting. Harmonizing these methods is a critical step toward building a reliable global database of microplastic pollution.
Techniques for Collecting Micro Plastics in Freshwaters and Sediments
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This review examined sampling methods used across 150 studies on microplastics in freshwater bodies and sediments, finding significant variation in sampling tools, mesh sizes, and analytical approaches that make it difficult to compare results across studies. Standardizing sampling and analysis protocols is one of the most pressing needs in microplastic research. Without comparable methods, it is difficult to assess the true extent of freshwater microplastic contamination globally.
Methods for sampling and detection of microplastics in water and sediment: A critical review
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This critical review evaluates existing methods for sampling and detecting microplastics in water and sediment, identifying flaws in study design such as inconsistent size cutoffs, varied extraction protocols, and non-standardized identification techniques. The authors recommend improvements to increase comparability and reliability of microplastic measurements across studies. Standardization is considered the most important step toward understanding global microplastic contamination.
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