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AOAC RESEARCH INSTITUTE 

Expert Review Panel Chair Report for Fertilizers 

Page 3 of 3 

EXPERT REVIEW PANEL, METHOD BACKGROUND, AND CONCLUSIONS 

Criteria for Vetting Methods to be considered:

AOAC convened the 

Official Methods of Analysis SM 

(OMA) Expert Review Panel for Fertilizers on Monday, 

September 28, 2015 during the AOAC Annual Meeting and Exposition held at the Westin Bonaventure Hotel, 404 

South Figueroa Street, Los Angeles, California 90071. 

The purpose of the meeting was to review and evaluate OMAMAN‐22: Determination of Nitrogen, Phosphorus, 

Potassium and other nutrients release in Slow‐ and Controlled‐Release Fertilizers, OMAMAN‐23: Single 

Laboratory Validation of a Method for the Determination of Phosphorus and Potassium in Commercial Inorganic 

Fertilizers by ICP‐OES, OMAMAN‐24: Determination of Total Sulfur in Fertilizers by High Temperature 

Combustion, and OMAMAN‐28: Simultaneous Determination of Arsenic, Cadmium, Calcium, Chromium, Cobalt, 

Copper, Iron, Lead, Magnesium, Manganeses, Molybdenum, Nickel, Selenium, and Zinc in Fertilizers by 

Microwave Acid Digestion and Inductively Coupled Plasma‐Optical Emission Spectrometry Detection: Single 

Laboratory Validation.  

The study director for OMAMAN‐22 was William Hall for Mosaic, located at 13830 Circa Crossing Drive, Lithia, 

Florida 33547.  The candidate method (OMAMAN‐22) was reviewed and supplemental information was also 

provided to the reviewers which included the Evaluation Of A Soil Incubation Method To Characterize Nitrogen 

Release Patterns of Slow‐ And Controlled‐Release Fertilizers, Optimization And Validation Of An Accelerated 

Laboratory Extraction Method To Estimate Nitrogen Release Patterns Of Slow‐ And Controlled‐Release Fertilizers, 

Statistical Correlation Of The Soil Incubation And The Accelerated Laboratory Extraction Methods To Estimate 

Nitrogen Release Rates Of Slow‐ And Controlled‐Release Fertilizers, and the Method Safety Checklist. This method 

was reviewed as a single laboratory validation. 

The study director for OMAMAN‐23 was James Bartos of the Office of Indiana State Chemist, Purdue University, 

located at 175 South University Street, West Lafayette, Indiana 47907.  The candidate method (OMAMAN‐23) was 

reviewed and supplemental information was also provided to the reviewers which included the Determination of 

Phosphorus and Potassium in Commercial Inorganic Fertilizers by Inductively Coupled Plasma‐Optical Emission 

Spectrometry: Single‐Laboratory Validation. This method was reviewed as a single laboratory validation.  

The study director for OMAMAN‐24 was Calum McCusker of Elementar Americas, located at 520 Fellowship Road, 

Suite D‐408, Mt. Laurel, New Jersey 08054.  The candidate method (OMAMAN‐24) was reviewed and supplemental 

information was also provided to the reviewers which included the Determination of Total Sulfur in Fertilizers by 

High Temperature Combustion: Single‐Laboratory Validation, Material Safety Data Sheet for SICAPENT with 

Indicator, Method Safety Checklist, and the 

AOAC Official Method 980.02 Sulfur in Fertilizers‐ Final Action 1985.  

This method was reviewed as a single laboratory validation. 

The study directors for OMAMAN‐28 was Sharon Webb of the University of Kentucky, Division of Regulatory 

Services, located at 103 Regulatory Services Bldg, Lexington , Kentucky 40546‐0275.  The candidate method 

(OMAMAN‐28) was reviewed and supplemental information was provided to the reviewers which included the 

Simultaneous Determination of Arsenic, Cadmium, Calcium, Chromium, Cobalt, Copper, Iron, Lead, Magnesium, 

Manganeses, Molybdenum, Nickel, Selenium, and Zinc in Fertilizers by Microwave Acid Digestion and Inductively 

Coupled Plasma‐Optical Emission Spectrometry Detection: Single Laboratory Validation modification and extension 

of AOAC 2006.03, Single Laboratory Information, Method Safety Checklist, and AOAC OMA 2006.03. This method 

was reviewed as a new method.  

William Hall, Calum McCusker, and James Bartos were present during the Expert Review Panel session.    

ERP PROFILE SUMMARIES

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