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Proficiency testing programs
are operated by a third party,
non-profit association. The
participation in independent testing
programs is a key component in our
Quality Control program.

DMM is an
active member of the National
Association for Proficiency Testing
Organization (NAPT).
This group submits reference samples
to DMM for analysis.
Laboratory results from the
participating labs are then compared
with data from all of the
participating laboratories.
Statistics are then determined so
that laboratory data can be
compared. Our
calibration
lab consistently reproduce
check sample data within the highest
standards of participating
laboratories – not all laboratories
are accurate.
Please check below our results:

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