Evaluation of EcoExposure™ Across Challenging Environmental and Drinking Water Matrices
- ecotera home Team
- May 30
- 2 min read
Abstract Environmental and drinking water samples often contain naturally occurring constituents that can complicate optical monitoring workflows. These include dissolved organic matter (DOM), mineral hardness species, suspended colloids, biological materials, and varying ionic strength. This technical note summarizes high-level observations from field evaluations of the EcoExposure™ platform across multiple challenging matrix categories.
Despite substantial differences in composition, the EcoExposure™ workflow successfully generated interpretable optical responses across all evaluated sample classes. These findings demonstrate the platform’s adaptability to diverse real-world water matrices and support its potential for distributed environmental intelligence systems.
This paper is also available at:
https://doi.org/10.5281/zenodo.20470346
Key Challenging Matrix Categories Evaluated
Location / Type of Water | Characteristic | Result |
Marine Water | High salinity and ionic strength | Successful field performance |
Mineral-Rich River and Tap Water | Hardness-associated optical interference and film formation | Interpretable assay responses maintained |
DOM-Rich Freshwater Systems | Elevated dissolved organic matter, coloration, and optical interference | Successful environmental assessment achieved
|
Tap water in US and Asia | Low particle level | Able to be interpreted consistently |
Figure 1. Representative challenging water matrices evaluated with EcoExposure™. Left: Marine water near the Golden Gate Bridge, San Francisco (high salinity). Center: Urban river water from the Seine River, Paris, France. Right: DOM-rich freshwater from Miami Whitewater Lake, Ohio. The EcoExposure™ platform produced usable results across these contrasting environments using portable, low-infrastructure field methods.
General Observations Environmental matrices differ substantially in optical behavior and assay kinetics. Common naturally occurring interferents observed include dissolved organic matter, humic and fulvic substances, mineral hardness species, suspended particulates, colloidal materials, and biological constituents.
In addition to evaluations in the United States and Europe, preliminary tap-water testing has also been conducted in Asia (Singapore and Manila). These early observations further support the platform’s potential for broader international application across diverse geographic and water-type conditions.
ImplicationsThese results support the feasibility of portable, distributed environmental monitoring across a wide range of real-world water types — including marine, riverine, lacustrine, and municipal drinking water systems.
Future studies will continue to refine approaches for handling environmental matrix effects and expand testing across additional regions and water types.
Related Technical Notes Rapid Distributed Freshwater Lake Sampling Pilot and Dissolved Organic Matter (DOM) Observations — Miami Whitewater Lake, Ohio
Rapid Distributed Seine River Microplastic / Nanoplastic Sampling Pilot — Paris, France
Multi-Site Validation Across the United States: Real-World Testing of a Portable Microplastic/Nanoplastic Water Assay
Field Validation of a Portable Zero-Shear Optical Interaction Assay for Microplastic–Nanoplastic Detection in Coastal (High Salinity) Water Under Uncontrolled Conditions: San Francisco Bay (April 2026)
International Field Testing of a Portable Optical Interaction Assay in Municipal Tap Water: Singapore and the Philippines (April 2026)
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