Measuring Total PFASs in Water: The Tradeoff between Selectivity and Inclusivity

Area of Science:

• Environmental Chemistry
• Analytical Chemistry
• Water Quality

Background:

• Per- and polyfluoroalkyl substances (PFASs) are widespread contaminants in global drinking water sources.
• Current analytical methods often underestimate the total PFAS contamination due to a focus on targeted compounds.

Purpose of the Study:

• To review and discuss bulk organofluorine measurement techniques for quantifying unidentified PFAS fractions.
• To evaluate the advantages and disadvantages of these methods for water analysis.
• To suggest future directions for comprehensive PFAS characterization in environmental samples.

Main Methods:

• Review of existing literature on bulk organofluorine measurement techniques.
• Analysis of the selectivity-inclusivity tradeoff in analytical approaches.
• Discussion of applicability to drinking water and environmental samples.

Main Results:

• Bulk organofluorine analysis offers a complementary approach to targeted methods for a more complete PFAS assessment.
• Specific techniques vary in their ability to capture the full spectrum of PFAS compounds.
• Understanding the limitations and benefits of each method is crucial for accurate risk assessment.

Conclusions:

• There is a need to move beyond targeted analysis to fully understand the extent of PFAS contamination.
• Bulk organofluorine measurements are essential for characterizing the unidentified portion of PFASs.
• Improved analytical strategies are required for better management of PFAS in drinking water.