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Interlaboratory Testing: Preliminary Concepts
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  1. Interlaboratory Testing:Preliminary Concepts Carolyn Cairns and Janet Carter 16 May 2013

  2. Purpose for the Workshop • Present framework for ITG testing • Develop recommendations on specifics for testing strategy • Workshop will provide solid recommendations to steering committee on path forward for ITG • Identify critical considerations for inter-laboratory testing

  3. ITG Charge To develop a testing strategy* to assess • Robustness • Reproducibility • Repeatability • Transferability of analytical methods available to detect nanoscale releases from selected nanocomposites for priority release scenarios *based on TG and SOS white papers

  4. Initial Approach • Small pilot project to explore feasibility of inter-laboratory testing • Quickly identify inconsistencies or deficiencies • Fine tune methods for broader testing • Design appropriate analytical and process controls • Creation and transport of samples • Identification of MWCNT • Polymer and polymer/MWCNT • Standardized material as laboratory control • Positive and negative controls

  5. Materials (CNT/Polymers) Suppliers Analytical Methods Development (e.g. particle count, SEM, AUC, etc.) Sample Generation Module Lab A Identify specific scenarios and CNT/polymer for consumer and occupational settings • A. Abrasion/ • Consumer Lab B Lab A • B. Sanding/ • Occupational Lab C Lab B Lab D CNT/polymer specific to uses subject to weathering • C. Weathering/ • Environmental Lab E

  6. Break Out Sessions • Make decisions regarding materials, scenarios, and methods to be used in Phase 3 – the interlaboratory testing • Decisions based on information obtained in TGs and SOS as well as Phase 2.5 document • Recommendations from breakout sessions will be sent back to steering committee for final analysis • Information from breakout sessions will be used for potential future studies

  7. Additional Considerations • Recruit labs to participate • Develop criteria for lab inclusion • Number of labs needed for initial pilot study • Amount of Funding and Mechanism of Funding • Develop CRADA or other enabling tools to foster cooperation and coordination – if needed • How and when to transition from pilot to method validation and standardization