Page 2 of 3 Copyright © 2024 by the AOCS
International Trade Methods
Refer to the AOCS Laboratory Safety chapter when using this Method.
Test Methoda FOSFA Method AOCS Method
21. Liter-Weight in Air ISO 6883:2017 Cc 10c-95c
22. Melting Point (slip point) ISO 6321:2021 Cc 3b-921
23. Mineral Acidity BS 684-2.48:1998 Cd 3d-63b
24. Moisture and Volatile Matter ISO 662:2016 Ca 2c-25b,d, Ca 2b-38,
and Tb 1a-64
25. Organic Dirt/Total Dirt ISO 663:2017 Noned
26. Oxidized Fatty Acids BS 684-2.12:1984 Noned
27. Oxidative Stability ISO 6886:2016 Cd 12-57c
28. Peroxide Value ISO 3960:2017 Cd 8-53c
29. Phosphoric Acid Test ISO 150:2018 Noned
30. Phosphorus (Colorimetric Method) ISO 10540-1:2003 Ca 12-552
31. Phosphorus(B) Direct Graphite Furnace ISO 10540-2:2003
32. Polyethylene ISO 6656:2002 Ca 16-75c
33. Rancidity Index (Kreis Test) — Noned
34. Refined and Bleach Test AOCS Cc 8d-55 (2024) Cc 8d-55c
35. Refined and Bleached Color in Tallow and
Greases Intended for Soap Production
AOCS Cc 8d-55 (2024) Cc 8d-55
36. Refractive Index ISO 6320:2017 Cc 7-25b
37. Saponification Value ISO 3657:2023 Cd 3-25b
38. Soap Content FOSFA Official Method:2010 Cc 17-95c
39. Solid Fat Content-NMR ISO 8292-1:2008 and ISO 8292-2:2008 Cd 16b-933
40. Specific Extinction in Ultraviolet Light ISO 3656:2011/Amd 1:2017 Ch 5-91b4
41. Sterols (Individual) ISO 12228-1:2014 and ISO 12228-2:2014 Ch 6-91c
42. Titer ISO 935:1988 Cc 12-59b
43. Total Fatty Matter BS 684-2.4:1976 Noned
44. Trace Metal—Copper, Iron, Nickel ISO 8294:1994 Ca 18b-91c
45. Trace Metal—Lead ISO 12193:2004 Ca 18c-91b5
46. Unsaponifiable Matter AOCS Tk 1a-64 (2024) Tk 1a-64
47. Unsaponifiable Matter (Diethyl Ether) ISO 3596:2000 Ca 6b-53b
48. Unsaponifiable Matter (Hexane Method) ISO 18609:2000 Ca 6a-40
49. Water (By Distillation) ISO 934:1980 Ca 2a-45b
50. Water-Insoluble Solvents BS 684-1.9:1976 F 10-44b,d
Other than FOSFA:
Palm Oil6
Free Fatty Acids MPOB Method P2.5 Cd 3d-63b
Slip Melting Point MPOB Method P4.2 Cc 3-25c1
Cloud Point MPOB Method P4.3 Cc 6-25
Color, Lovibond MPOB Method P4.1 None
Iodine Value MPOB Method P3.2 Cd 1-25b

Copyright © 2024 by the AOCS Page 3 of 3
International Trade Methods
Refer to the AOCS Laboratory Safety chapter when using this Method.
aSpecified in international contracts.
bSimilar, but not identical to FOSFA or other specified method (opportunity for “harmonization” or
adoption of ISO, BS, or other specified method).
cIdentical to FOSFA or other specified method.
d Where no similar or identical AOCS method exists, the AOCS will consider the adoption of the method and
note in the Scope of the AOCS version that it may be used in international trade.
NOTES
1 In 1992, the AOCS adopted the ISO slip method as AOCS Official Method, Cc 3b-92 declared AOCS Official
Method, Cc 4-25 obsolete changed the title of AOCS Official Method, Cc 3-25 from “Softening Point” to “Slip
Point, AOCS Standard” and noted the application of Cc 3-25 to palm oil.
2 Identical with FOSFA method, except for the FOSFA specification to homogenize the whole sample and to carry out
the analysis on the unfiltered sample, especially for crude oils with a sediment or haze. The AOCS version is similar,
but not identical to IUPAC 2.421 (IUPAC version requires a higher ignition temperature than the AOCS version.)
3 In general, methods are similar European methods specify different temperatures than US methods.
4 AOCS adopted Italian Standard Method, NGD C40-1976 in 1991, as AOCS Official Method, Ch 5-91.
5 AOCS adopted IUPAC Standard Method, 2.632 in 1991, as AOCS Official Method, Ca 18c-91.
6 MPOB test methods may not completely agree with AOCS methods. FOSFA recommends adoption of ISO/BS/
AOCS methods.