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Related Experiment Videos

The pressure hold/drop integrity test; its correlation to diffusive flow

A M Trotter1, T H Meltzer

  • 1Sartorius Corporation, Edgewood, NY, USA.

PDA Journal of Pharmaceutical Science and Technology
|September 30, 1998
PubMed
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The pressure-drop/hold test offers a non-destructive method for filter integrity testing, preventing downstream contamination. This method correlates pressure decay with organism retention, ensuring filter reliability and preventing system failures.

Area of Science:

  • Filtration Technology
  • Microbial Control
  • Process Engineering

Background:

  • Traditional filter integrity testing can be invasive and risk downstream contamination.
  • Accurate integrity testing is crucial for sterile filtration processes in pharmaceutical and biopharmaceutical industries.

Purpose of the Study:

  • To introduce and validate the pressure-drop/hold procedure as a non-destructive method for diffusive flow integrity testing of filters.
  • To demonstrate the correlation between pressure decay measurements and organism retention data for sterilizing-grade filters.

Main Methods:

  • Utilizing pressure transducers to measure pressure loss upstream of the filter.
  • Performing arithmetic conversion of pressure decay curves into diffusive airflow curves.
  • Employing automated integrity test machines for sensitive pressure drop measurements.

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Main Results:

  • The pressure-drop/hold procedure allows integrity testing without breaching the downstream system.
  • The method effectively identifies leaks from faulty seals, incorrect filter types, or flawed filters.
  • Correlation of pressure decay with organism retention data enables the procedure to serve as a validated integrity test.

Conclusions:

  • The pressure-drop/hold procedure is a reliable and non-destructive method for filter integrity testing.
  • Automated test machines are recommended for accurate and sensitive measurements, enhancing filter integrity assurance.
  • This method prevents the use of compromised filtration systems, ensuring product safety and process efficiency.