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April 15, 2026Water ResearchOpen Access

PFAS Quantitation with Diffusive Gradients in Thin-Film Passive Samplers: Capturing Time-Weighted Average Concentrations Around Maximum Contaminant Levels to Facilitate Compliance

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Authors

BHBrianna HarrisSHSamuel D. HodgesDWDavid G. Wahman

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Overview

Demonstrates DGT quantifies time-weighted average PFAS concentrations in water, highlighting its potential for compliance monitoring.

Key Points

  • The aim is to evaluate the efficiency of diffusive gradients in thin-film (DGT) passive samplers in quantifying per- and polyfluoroalkyl substances (PFAS) in water.
  • Used diffusive gradients in thin-films (DGT) passive samplers for PFAS quantification in water.
  • Determined gel diffusion coefficients using a non-steady state finite difference model (FDM).
  • Assessed goodness of fit with normalized weighted sum of square errors (WSSE).
  • Error in diffusion coefficients was propagated into time-weighted average concentrations (C DGT).
  • DGTs accurately captured time-weighted average PFAS concentrations at levels around 1, 10, 100, and 200 ng L −1.
  • D Gel estimates showed less error and were reliable across 32 PFAS.
  • The median difference between D Gel values and free water diffusivities was 6.5%.

Cite This Study

Harris et al. (2026) studied this question.

synapsesocial.com/papers/69df2a4be4eeef8a2a6af875https://doi.org/10.1016/j.watres.2026.125918
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