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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.
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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.
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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.
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Attachment 3: Summary of Expert Reviewer Comments for OMAMAN‐23
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Attachment 4: Summary of Expert Reviewer Comments for OMAMAN‐22
ERP PROFILE SUMMARIES
286