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AOAC RESEARCH INSTITUTE  Expert Review Panel Chair Report for Fertilizers  Page 6 of 6  MOTION: 

Motion by Phillips; Second by Wegner,  to edit the method prior to First Action publication to  accommodate sample preparation, instrument conditions, safety, and to allow for other instrument  manufacturers.  Consensus demonstrated by: (Unanimous) in favor, 0 opposed, and 0 abstentions. Motion Passed. All ERP members presented a review and discussed the proposed collaborative study manuscript for  OMAMAN‐23: Single Laboratory Validation of a Method for the Determination of Phosphorus and Potassium in  Commercial Inorganic Fertilizers by ICP‐OES. The method author, James Bartos of the Office of Indiana State  Chemist, Purdue University was present and able to address questions and concerns of the ERP members.  A  summary of comments were provided to the ERP members and the method author. 3   By consensus, the ERP  presented the following motions for OMAMAN‐23.    MOTION:  Motion by James; Second by  Tsourides ,  to move OMAMAN‐23 to First Action Official Methods status  with editorial changes. Consensus demonstrated by: (Unanimous) in favor, 0 opposed, and 0 abstentions. Motion Passed. MOTION:  Motion by Tsourides; Second by Shelite,  to move OMAMAN‐23 to First Action Official Methods status  with editorial changes as follows prior to first action publication: 1) To consider empirical calibration  and that the system optimization be based the instrument manufacturer’s recommendation for an  organic matrix (carbon).  Consensus demonstrated by: (Unanimous) in favor, 0 opposed, and 0 abstentions. Motion Passed. MOTION:  Motion by Shelite; Second by James, for OMAMAN‐23 to be considered for AOAC Final Action, the  following is recommended: 1) for the method to be collaboratively studied, and 2) based on  collaborative results, the ERP will determine whether the method is for screening or confirmatory.  Consensus demonstrated by: (Unanimous) in favor, 0 opposed, and 0 abstentions. Motion Passed. All ERP members presented a review and discussed the proposed collaborative study manuscript for  OMAMAN‐22: Determination of Nitrogen, Phosphorus, Potassium and other nutrients release in Slow‐ and  Controlled‐Release Fertilizers. The method author, William Hall of Mosaic, was present and able to address  questions and concerns of the ERP members.  A summary of comments were provided to the ERP members  and the method author. 4   By consensus, the ERP presented the following motions for OMAMAN‐22.    MOTION:   Motion by Bartos; Second by Hartshorn, to move OMAMAN‐22 to First Action Official Methods  status.   Consensus demonstrated by: 5 in favor, 1 opposed, and 1 abstention. Motion Did Not Pass.*   *Method must be adopted by unanimous decision of ERP on first ballot, if not unanimous, negative votes must delineate scientific reasons.  Negative vote(s) can be overridden by 2/3 of voting ERP members after due consideration.

MOTION:   Motion by Bartos; Second by Hartshorn,

to move OMAMAN‐22 to First Action Official Methods 

status.   Consensus demonstrated by: 5 in favor, 1 opposed, and 1 abstention. Motion Passed.  Negative votes were overridden by 2/3 of voting ERP members. 

3 Attachment 3: Summary of Expert Reviewer Comments for OMAMAN‐23 4 Attachment 4: Summary of Expert Reviewer Comments for OMAMAN‐22 03/12/2018