Optimizing PTFE, FEP, and PFA Tubing in Groundwater Sampling and Testing

Tips for XPRT Members

Groundwater sampling and testing play a vital role in assessing environmental quality and monitoring potential contaminants. The selection of appropriate tubing materials is crucial to ensure the accuracy and reliability of sampling results. Among the various tubing options available, polytetrafluoroethylene (PTFE), fluorinated ethylene propylene (FEP), and perfluoroalkoxy (PFA) tubing stand out for their exceptional chemical resistance and inertness.

This guide aims to provide guidance on the optimal utilization of PTFE, FEP, and PFA tubing in different groundwater sampling and testing scenarios.

 

PTFE Tubing

PTFE Striped Tubing digital representation of tubing structure and properties
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  • Suitable for sampling in highly acidic or alkaline groundwater with minimal risk of chemical reaction or degradation.
  • Use PTFE tubing when sampling for persistent organic pollutants or volatile organic compounds (VOCs) due to its low permeability and inertness.
  • PTFE's high lubricity facilitates smooth sample collection and transport.
  • Ideal for sampling in elevated temperature environments where other materials may degrade (-200°C to 260°C).

  

FEP Tubing

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  • Opt for FEP tubing when visual inspection of samples is necessary, such as assessing turbidity or particulate matter.
  • Use FEP in applications where moderate chemical resistance is sufficient, such as sampling in neutral pH groundwater or surface water.
  • FEP's temperature range (-70°C to 205°C) is suitable for most groundwater sampling applications.

 

PFA Tubing

PFA Standard Tubing - All Sizes digital representation of tubing structure and properties
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  • PFA combines the chemical resistance of PTFE with the clarity and flexibility of FEP.
  • Choose PFA tubing for sampling in environments with potential mechanical stress or abrasion, such as well installations with rough surfaces or high flow rates.
  • PFA benefits from low extractable levels, which ensure minimal interference with sample analysis.
  • PFA's temperature range (-70°C to 260°C) provides versatility in sampling environments.

 

Get in Touch

For more detailed guidance on tubing selection and groundwater sampling techniques, consult with experienced fluoropolymer engineers at Fluorostore by contacting support@fluorostore.com