AOAC ERP Fertilizers - March 2019

3/14/2019

AOAC EXPERT REVIEW PANEL FOR MICROBIOLOGY FOR FOODS AND ENVIRONMENTAL SURFACES

EXPERT REVIEW PANEL FOR FERTILIZERS  Comparability of apparatus types

5

Total Sulfur in Fertilizers 2017.08

AOAC EXPERT REVIEW PANEL FOR MICROBIOLOGY FOR FOODS AND ENVIRONMENTAL SURFACES

EXPERT REVIEW PANEL FOR FERTILIZERS  Validation Materials ‐ Sulfur Determination by Combustion # Sample Approx S Range, % Source  Reference

Comment

Consensus  Material Consensus  Material Consensus  Material Consensus  Material

MDL ‐ Method Blank  (Urea)

1 160511

0 ‐ 1 %

Magruder

2 180311

0.5 ‐ 1.5%

Magruder

Liquid Organic

Prepared by Dr. James Bartos  and the Office of Indiana  State Chemist

3 2011‐05

1 ‐ 2%

Magruder

Poultry Litter Ash

4 2011‐08 5 K Sulfite 6 Ca Thio 7 2011‐07 8 Anuvia

6 ‐ 7% 7 ‐ 9% 9 ‐ 11% 9 ‐ 11% 19 ‐ 51%

Magruder

Blended Lawn Fertilizer

TKI TKI

Liquid Sulfite

Liquid Thiosulfate

Consensus  Material

Magruder

5%SO4, 5% Elemental SO4 + Organic Common Solid  Fertilizer/SO4 Common Solid  Fertilizer/SO4 Liquid Thiosulfate

Anuvia

9 2016‐0276 21 ‐ 23%

OISC

KMAG

10 2016‐0667 23 ‐ 25%

OISC

AMS

11 NH4 Thio

25 ‐ 27%

TKI

ATS

12 Dri Sulfur 42 41 ‐ 43%

Monty's

Elemental S

Micronized  Sulfur

Total Sulfur in Fertilizers 2017.08

6

13

90 ‐ 94%

Wilbur‐Ellis

Elemental S

3