P8: Interlaboratory study on the analysis of adenosine triphosphate in metalworking fluids

The completion of an interlaboratory study (ILS) within five years after a new Method has been adopted is an integral component of the ASTM process for new standard test methods.  ASTM E2694 Method for Measurement of Adenosine Triphosphate in Water-Miscible Metalworking Fluids was initially approved in April, 2009.  In January 2011, ten companies participated in an ILS for the Method. The ILS test plan included two formulations each of emulsifiable oil, semi-synthetic and synthetic metalworking fluids, with ATP bioburdens ranging from 0.3 Log₁₀ pg ATP mL-1 to >5.0 Log ₁₀ pg ATP mL-1.  This presentation discusses the ILS test plan design and results.