AOAC SPADA Meeting

Naval Medical Research Center (NMRC) PR2 Confidence Testing • 98 different soil samples were purchased from the North American Proficiency Testing (NAPT) Program of the Soil Science Society of America • One potting soil purchased locally • Same CST PBST extraction utilized • Toxin LOD determination possible, but at some cost to sensitivity (but specificity gained)

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Final Thoughts • Clean soil background (or “why we are here”)  CSTs currently using PBST to determine thresholds

 Storage conditions?  How do we obtain? • Potentially a standardized protein extraction protocol  PBST is not the ideal extraction buffer  Is this possible? Instrumentation, procedural issues  Varies from protein to protein of interest • National Ecological Observatory Network (NEON) (National Science Foundation [NSF]) – collect field data from 81 sites (47 terrestrial)

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