Validation Criteria of an APC Calibration Suspension Preparation Loop

Globally there is a need for highly accurate particle counting. This is especially true in the filtration and separation industry. An ISO expert group took on the responsibility to draft the new specification for the improved calibration fluid, SRM2806b, which will be used to calibrate optical particle counters worldwide.  IFTS accepted the development challenge and used its expertise in particle counting and cleanliness control to develop a new world class fluid process and production system to produce the new calibration fluid.

 6b Secondary Calibration Fluid

SRM2806b Secondary Calibration Fluid

The initial challenge was to produce four hundred, 400mL bottles with an ISO suspension of silica powders in a standard mineral oil and to guarantee that the particle size distribution is replicated in each and every bottle.

With this new validated equipment, IFTS can now guarantee online particle stability within 1 % >4 µm(c) and 5 % >40 µm(c) and larger.

Our new equipment will allow IFTS to supply the world market with the most repeatable secondary calibration suspensions ever prepared according to ISO 11171.

NIST is currently validating all the bottles in their labs in Maryland.

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