AOAC ERP Fertilizers - December 2017

AOAC OFFICIAL METHODS OF ANALYSIS SM (OMA) EXPERT REVIEW PANE L FOR MICROBIOLOGY FOR FERTILIZERS TABLE OF CONTENTS

I. ABOUT AOAC OF F ICAL METHODS OF ANALYSIS ™....................................................................................... 3 II. AGENDA – PHOSPHORUS AND POTASSIUM ........................................................................................................ 7 III. AGENDA – TOTAL SULFUR .................................................................................................................................. 9 IV. AGENDA – SLOW AND CONTROLLED RELEASE .................................................................................................... 11 V. AOAC INT ERNATIONAL VOLUNTEER CONFLICT OF INTEREST, STATEMENT OF POLICY ........................................ 13 VI. AOAC IN TERNATIONAL ANT I TRUST POLICY STATEMENT AND GUIDELINES .................................15 VII. AOAC IN TERNATIONAL POLICY ON THE USE OF THE ASSOC I ATION NAME, INITIALS, IDENTIFYING I NSIGNIA, LETTERHEAD, AND BUSINESS CARDS ................................................................................................. 19 VIII. MEETING AND METHOD REVIEW INFORMATION ...................................................................................... 23 IX. AOAC EXPERT REVIEW PANEL ORIENTA TI ON PRESENTATION ................................................................25 X. REV IE W OF METHODS FOR AOAC FIRST ACTION OFFICIAL METHODS STATUS: A. OMAMAN-24: DETERMINATION OF TOTAL SULFUR IN FERTILIZERS BY HIGH TEMPERATURE COMBUSTION

1) OMAMAN -24 A : Collaborative Study Manuscript(Revised) ................................ 67 2) OMAMAN-24 B: Summary of Comments from vote on February 3, 2017 ........... 73 3) OMAMAN-24 C: Article: Determination of Total Sulfur in Fertilizers by High Temperature Combustion: Single-Laboratory Validation..................................... 79 4) OMAMAN-24 D: AOAC Expert Review Panel Report (September, 2015)............. 85

XI. REV IE W OF METHODS FOR AOAC FINAL ACTION OFFICIAL METHODS STATUS:

A. AOAC OFFICIAL METHOD 2015.18 PHOSPHORUS AND POTASSIUM IN COMMERCIAL INORGANIC FERTILIZERS INDUCTIVELY COUPLED PLASMA–OPTICAL EMISSION SPECTROMETRY, FIRST ACTION 2015 1) OMA 2015.18 A: Method......................................................................................... 93 2) OMA 2015.18 B: Article: Determination of Phosphorus and Potassium in Commercial Inorganic Fertilizers by Inductively Coupled Plasma–Optical Emission Spectrometry: Single-Laboratory Validation, First Action 2015.18 ................................................. 101 3) OMA 2015.18 C: AOAC Expert Review Panel Report (September, 2015) .............. 85 B. AOAC OFFICIAL METHOD 2015.15 NITROGEN, PHOSPHORUS, AND POTASSIUM RELEASE RATES OF SLOW-AND CONTROLLED-RELEASE FERTILIZERS, FIRST ACTION 2015 1) OMA 2015.15 A: Method......................................................................................... 109 2) OMA 2015.15 B: Article: Determination of Nitrogen, Phosphorus, and Potassium Release Rates of Slow- and Controlled-Release Fertilizers: Single-Laboratory Validation, First Action 2015.15................................................................................................. 115 3) OMA 2015.18 C: AOAC Expert Review Panel Report (September, 2015) ............... 85