We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
There Is No Single "Standard" Laboratory Method for Microplastics Measurement A Comparative Review of Six Research Laboratory Analytical Workflows and Why EcoExposure™ Is Validated Against Analytical Performance Rather Than a Single Laboratory Method
Summary
Turns out there's no single "gold standard" lab test for measuring microplastics, this review compares six different methods and shows they each measure different things (like particle count, size, or chemical makeup) using different units, so the same water or blood sample can produce very different results depending on which lab technique is used. This matters because it means you should be cautious about any single microplastics number you see reported, and it explains why a new tool called EcoExposure™ was built to focus on consistent, repeatable measurements rather than trying to match one specific lab method.
A common question asked of emerging microplastic detection technologies is whether they have been “validated against the laboratory standard.” This question assumes the existence of a single, universally accepted laboratory reference method. In reality, no such method currently exists. Laboratories employ multiple analytical workflows that differ in physical principle, instrumentation, sample preparation, size detection limits, reporting units, and measured endpoints. As a result, the same sample can yield substantially different numerical results depending on the method used, while remaining scientifically valid within each method’s analytical framework. This paper reviews six commonly used laboratory approaches, explains why differences between methods should be expected, and discusses implications for the validation of new field-deployable and screening technologies. Figure 1. Different analytical methods measure different endpoints in microplastics and nanoplastics analysis. Established laboratory approaches—including FTIR microscopy, Raman microscopy, Py-GC-MS, thermal desorption GC-MS, SEM-EDS, and fluorescence imaging—use different instrumentation and may report particle count, polymer mass, particle size, morphology, polymer identity, or relative abundance in non-interchangeable units. EcoExposure™ is designed instead around a defined field-measurement framework for total plastic burden, including microplastics and nanoplastics, expressed on a standardized particles-per-liter basis to support repeatable comparison across samples, locations, and time. Laboratory methods remain complementary where polymer-specific identification, morphology, chemical confirmation, or other method-specific analytical endpoints are required.