*** TEST *** GWP 12 09 21



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Expected already for a long time, USP published new drafts to revise the General Chapters 41 “Balances” and 1251 “Weighing on an Analytical Balance” in the Pharmacopeial Forum PF 38(5) on September 4, 2012. One consequence of General Chapter 41 is the so-called minimum weight which needs to be adhered to in order to fulfill applicable accuracy requirements for weighing systems. It is very important to state that the concept of minimum weight is not only restricted to applications in the scope of USP General Chapter 41, but applies to any weighing instrument, for balances in the laboratory and for scales in the production area. Learn from the GWP® weighing experts of METTLER TOLEDO in the new White Paper “GWP® – The Standard – Science Based Weighing” about the implications of the minimum weight on the accuracy and integrity of weighing processes. USP also breaks new grounds in the proposed revision of General Chapter 1251 by suggesting a risk-based approach for routine testing of weighing instruments. These concepts are also applicable for any kind of weighing instrument in the laboratory and the production area and are equally implemented in the scientific standard GWP®. Routine testing is not only focused on providing documented evidence on consistently accurate weighing results, but also provides a strategy to reduce testing – and thus to reduce cost – by only recommending meaningful tests in appropriate intervals. As also confirmed by the new USP drafts and current FDA thinking, daily tests of weighing systems are not stipulated anymore.


Download the GWP® White Paper to:

  • Understand the concept of minimum weight as the key to ensure consistently accurate weighing results in the laboratory and the production area
  • Learn how your specific weighing process requirements can be fulfilled and documented by a scientific strategy to select, calibrate and test your weighing systems
  • Get insight into the risk-based approach to performing routine testing of balances and scales
  • Learn about the proper weight selection for routine testing of balances and scales
  • Understand that daily checks of weighing systems is not considered anymore as state-of-the-art approach for testing weighing systems


See our presentation about GWP® at the ISPE Annual Meeting 11 – 14 November 2012, session 206 „Innovation in Laboratory and Production Operations“.

For further information visit http://www.ispe.org/2012-annual-meeting/innovation-laboratory-operations.

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