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News Blog
September 29, 2020 12:30 PM

Powder Filling: Sample Points and Risk Analysis

Written by PMS

Read the previous blog in this series here.

sample-probe

Where Do I Monitor for Contamination?

The next concern after validating your monitoring process for powder filling is: Where should I sample? As previously discussed, the EU GMP Annex 1 states the monitoring should be routine and based on risk analysis. Particle Measuring Systems uses an approach that is based on extensive process flow and environmental monitoring experience. Regulatory guidance supports this approach and along with an issued system rationale document. It uses data attained during a room classification exercise to justify selection parameters.

Cleanroom classification essentially proves that the room meets its specification for both cleanliness and uniformity. Much of the ISO 14644-1 standard supports the following:

  • The cleanroom meets a particle count concentration requirement.
  • The room’s concentration is evenly distributed.

If a cleanroom is not uniform and has areas considered worse-off than others, the room will not meet uniformity requirements. In addition, it won’t comply with the 96% upper control limit (UCL). There are steps to make a room uniform and Particle Measuring Systems experts can offer guidance for your specific circumstances.

Who Can Perform a Risk Analysis?

Suitable locations for the sample within the RABS or background area can be determined by applying a grid similar to the grid in the Particle Measuring Systems application note Choosing the Most Suitable Particle Sample Point Locations. The shape of the grid is based on the process to be qualified. Quality assurance teams may work together with third-party experts to optimize their sampling. Contact the Particle Measuring Systems Advisory Team for a personalized risk analysis and EM support for your facility.

 

Interested in the full paper? Click here to download for free.

Filed Under: Cleanroom Classification Qualification, Cleanroom Monitoring, Particle Knowledge

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