Earth Day 2026: From the Lab to the Environment

Earth Day 2026 arrives at a pivotal moment for science and sustainability. As global environmental pressures intensify—from persistent chemical pollutants and microplastics to the urgent need for greener industrial processes—the analytical sciences have never had a more critical role to play. Whether it is detecting per- and polyfluoroalkyl substances (PFAS) contamination in waterways, monitoring atmospheric pollutants across entire regions, ensuring the quality of recycled plastics, or rethinking the environmental footprint of the methods we use in the laboratory every day, chromatographic techniques are helping scientists understand, measure, and ultimately address some of the most pressing environmental challenges of our time.

How Green is Your Lab?

Before we can solve environmental problems, we must examine the environmental impact of our own analytical workflows. In How Green Is Your Method? Evaluating the Sustainability of Analytical Methods, Nick Snow, Alexander Bulsciewicz, and James Mizvesky explore three widely used scoring systems — RGB, AGREE, and AMGS — and consider how classical gas chromatography (GC), with its roots in the early environmental movement, continues to rank among the most sustainable techniques available.

Complementing this, Sustainable Analytical Methods: The Challenge Is Assessing Methods Before and After Improvements by Mary Ellen McNally takes a practical look at sample preparation—typically the most solvent-intensive step in any analytical workflow—and begins mapping a path toward a universal standard for measuring analytical "greenness."

Tackling the Plastics Crisis

The circular economy depends on our ability to verify what recycled materials actually contain. Analytical Solutions for Sustainable PET Production presents a rapid, robust high performance liquid chromatography (HPLC) method for analyzing cyclic oligomers in recycled polyethylene terephthalate (PET), supporting quality assurance in plastic recycling and aligning with Japanese Ministry of the Environment guidelines.

Monitoring Pollutants in the Environment

Several pieces in our archive go straight to the front line of environmental monitoring. Rapid PFAS Analysis in Estuaries Using SPE and LC–MS/MS sees Oliver Jones and Navneet Singh from RMIT University share their findings on how tidal cycles influence PFAS concentrations in estuarine systems and the sample preparation strategies that made their analysis possible.

Atmospheric pollution is the focus of Utilizing HPLC-FLD for Large-Scale Biomonitoring of Atmospheric PAHs, in which researchers used moss as a biomonitor across Quebec to track polycyclic aromatic hydrocarbons — including the compositional shifts caused by the devastating 2023 Canadian wildfires.

For those grappling with the sheer volume of data generated in environmental analysis, Prioritization Strategies in Non-Target Screening of Environmental Samples by Chromatography with High-Resolution Mass Spectrometry by Jan Christensen et al. offers a structured overview of seven strategies for making sense of complex sample data, from effect-directed prioritisation to pixel-based chromatographic analysis.

Expert Voices

Two recent video interviews bring fresh expert perspectives to environmental analytical chemistry. At analytica 2026, Gauthier Eppe of the University of Liège discussed how ion mobility–HRMS can resolve complex mixtures of halogenated persistent organic pollutants—pushing beyond the limits of GC–HRMS alone. And at Pittcon 2026, Damià Barceló of the Universidad de Almería addressed the critical knowledge gaps still facing the field of microplastics analysis, and what sustainable analytical approaches might help close them.

Earth Day serves as a useful moment to take stock of where analytical science stands in relation to the environmental challenges it is being asked to address. The content gathered here touches on several of the field's most pressing concerns: the environmental footprint of laboratory methods themselves, the analytical demands of a circular plastics economy, the detection of persistent and emerging contaminants, and the methodological frameworks needed to make sense of increasingly complex environmental data.

Progress is being made, but the articles and interviews featured here also make clear that challenges remain. Analytical science has an important role to play in this work, and the scientific community continues to refine both the methods and the standards by which they are judged.