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ISO 5667-27:2025 Is Not Directly Applicable to Intact-Liquid Field Measurement (EcoExposureTM): The Role of Filtration for Laboratory-Sampling in Microplastics / Nanoplastics Analysis
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A new technical note clarifies that a recently updated international standard for testing water for microplastics (tiny plastic particles) doesn't apply to newer field-testing devices, like EcoExposure™ Water, that measure plastic particles right on the spot instead of filtering samples and sending them to a lab. This matters because as portable microplastics-testing tools become more common, we need clear rules about which methods they should follow, otherwise results from different tools might not be comparable, making it harder to know how much plastic contamination is actually in our water and what that means for our health.
ISO 5667-27:2025 provides guidance for sampling suspended microplastics in water using approaches including grab sampling, cascade filtration, and net sampling. Importantly, the standard addresses sample collection rather than analytical measurement and does not establish methods for chemical analysis, physical characterization, digestion, or other downstream analytical procedures. The sampling architecture described in ISO 5667-27:2025 is principally relevant to workflows in which collected water or concentrated particulate material subsequently undergoes transportation, storage, preparation, and laboratory analysis. Filtration, cascade filtration, and net sampling are useful in this context because they facilitate particle collection, concentration, size fractionation, or recovery for downstream laboratory instrumentation. This architecture differs fundamentally from an intact-liquid field measurement platform in which the primary analytical measurement occurs directly at or near the point of sample collection. EcoExposure™ Water is being developed under this latter architecture. This technical note explains why ISO 5667-27:2025 is therefore not directly applicable as the primary sampling workflow for EcoExposure™, while remaining relevant to complementary laboratory analyses that require particle collection or concentration.
More Papers Like This
ISO 5667-27:2025 Is Not Directly Applicable to Intact-Liquid Field Measurement (EcoExposureTM): The Role of Filtration for Laboratory-Sampling in Microplastics / Nanoplastics Analysis
AI summary Read the abstract
This paper is a technical explainer, not a health study, it clarifies that a new international standard for collecting water samples to test for microplastics doesn't apply to a different type of tool (EcoExposure™) that measures microplastics directly in water on the spot, without filtering out particles first. Why it matters: as tools for detecting microplastics in our water become more common, it's important that testing methods are matched to the right technology, so results people rely on to understand their exposure are actually accurate and trustworthy.
ISO 16094-2:2025 Is Not Directly Applicable to Intact-Liquid Microplastic/Nanoplastic Field Measurement (EcoExposure™): Scope of Vibrational Spectroscopy Laboratory Methods for Clean Waters
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A new international standard (ISO 16094-2:2025) for testing microplastics in drinking water only covers one type of lab testing method and only catches plastic particles down to a certain size, meaning it misses many of the smallest nanoplastics that could be relevant to human health. This paper argues that a newer field-testing approach called EcoExposure™, designed to measure total plastic exposure (including tinier nanoplastics) right where water samples are collected, isn't the same thing and shouldn't be judged by this lab-based standard. The takeaway: there's still no single "gold standard" test that captures the full range of plastic contamination in the
ISO 16094-2:2025 Is Not Directly Applicable to Intact-Liquid Microplastic/Nanoplastic Field Measurement (EcoExposure™): Scope of Vibrational Spectroscopy Laboratory Methods for Clean Waters
AI summary Read the abstract
A new international standard for testing microplastics in drinking water only covers one specific lab method (using microscopes plus light-based chemical analysis) and only detects particles roughly 1 micrometer or larger, meaning it misses smaller nanoplastics that may be more easily absorbed by the body. This matters because it shows there's still no single "gold standard" test that captures the full picture of plastic contamination in water, so consumers should be cautious about assuming any one test result tells the whole story of their exposure.
EcoExposure™ and ISO 24187:2023 Principles in Asia, Oceania, Africa, and the Middle East: A Gentle, Field-Deployable Framework for Distributed Microplastic and Nanoplastic Screening
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Scientists have developed a portable, easy-to-use testing tool called EcoExposure™ that can detect tiny plastic particles (microplastics and nanoplastics) in water sources across regions like Asia, Africa, and the Middle East, without needing harsh chemicals or expensive lab equipment. This matters because it could make it much easier and cheaper to track plastic pollution in drinking water and waterways worldwide, especially in areas that previously lacked access to this kind of monitoring—an important step since we're still learning how microplastics in our water might affect human health.
EcoExposure™ and ISO 24187:2023 Principles in Asia, Oceania, Africa, and the Middle East: A Gentle, Field-Deployable Framework for Distributed Microplastic and Nanoplastic Screening
AI summary Read the abstract
Scientists have developed a portable, field-friendly tool called EcoExposure™ that tests water for tiny plastic particles (microplastics and nanoplastics) without using harsh chemicals or complicated lab equipment. This matters because it could make it much easier and cheaper to monitor plastic pollution in rivers, coastlines, and drinking water sources across regions like Asia, Africa, and the Middle East—areas that often lack access to expensive lab testing—helping communities and researchers track plastic contamination that may end up in the water and food we consume.
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