New Standard for Sampling Microplastics: A Significant Step in Plastic Research
National experts including NORCE and NAMC scientists have contributed to a new standard for sampling microplastics
Source:
Andreas R. Graven, NORCE
Researchers taking samples of microplastics
When the journey to address the environmental impact of microplastic pollution began a few decades ago, there was little knowledge on how to correctly tackle such a complex and multifaceted issue. Traditionally, environmental sampling equipment was trusting/based on plastic materials, risking contaminating every sample during collection. Therefore, initial efforts focused on developing dedicated samplers for plastic litter research. The research community debated various sampling strategies to ensure reliability and representativeness during sample collection. Little was known about the efficiency of extracting plastic particles from environmental matrices or how to prepare samples for analysis without damaging the polymers. Scientists struggled to find the most efficient and reliable analytical methods for correctly identifying and quantifying plastics in different environmental contexts.
A need for standardized sampling
As research advanced, significant improvements in sampling and detection technologies emerged. This progress emphasized the need to direct plastic research by either harmonizing or standardizing sampling and analysis methods. Harmonized methods aimed to align various existing approaches, allowing different research systems to produce comparable results despite diverse origins. This approach fostered collaboration, particularly in international studies, by creating a common language among diverse research groups.
Source:
Andreas R. Graven, NORCE
Microplastics researcher Alessio Gomiero is one of the NORCE and NAMC researchers who have contributed to the new standard. In this photo, he stands in the NORCE plast laboratory in Mekjarvik, Stavanger.
Crucial for documenting plastic litter
Alternatively, standardized methods sought to establish an official rulebook for sampling and analysis. These methods, developed by major organizations, ensured consistency and reliability across all tests, creating a robust framework for national and international monitoring programs. Such standardization was crucial for documenting the occurrence, distribution, and movement of plastic litter in the environment.
Ensuring effective collaboration
The International Organization for Standardization (ISO) acts as a global referee for setting standards. The organization brings together experts to agree on the best practices, ensuring smooth and safe operations across industries. In tackling plastic litter, ISO is developing guidelines for collecting and analysing plastic waste, enabling scientists and organizations globally to collaborate effectively. These standards will ensure coordinated efforts in addressing plastic pollution, with reliable and comparable data.
Standards Norway, Norway's member of ISO has gathered national experts including NORCE and NAMC scientists to promote the development and the final release of the ISO 5667-27:2025 standard, titled "Water Quality — Sampling. Part 27: Guidance on Sampling for Microplastics in Water." This standard marks a significant step forward in guiding consistent and effective plastic litter research worldwide. In Norway this will be addressed as NS-ISO 5667-27:2025
