The Official Methods of Analysis of AOAC INTERNATIONAL (OMA) is AOAC’s collection of over 3,000 validated methods for food, agriculture, supplements, environmental testing, and more!
OMA: The AOAC Gold Standard
Recognized globally, OMA is the most trusted source of chemical and microbiological standards, with many methods harmonized by ISO, IDF, IUPAC, and Codex Alimentarius.
Proven Methods!
Defensible Results!
OMA provides the scientific rigor, traceability, and global acceptance required for compliance, accreditation, and high‑stakes decision‑making.
Every method undergoes expert review and consensus validation, ensuring reproducible, defensible data you can rely on.
Built for Labs, Regulators, and Industry
- Laboratory directors and analysts who rely on validated, globally recognized methods
- Regulatory and compliance teams needing defensible, audit‑ready results
- Manufacturers and R&D groups developing or verifying analytical procedures
OMA Online: Continuous Updates
The online OMA is updated continuously, giving users access to the most current validated methods, revisions, and status changes as soon as they are approved.
What’s New in the 22nd Print Edition (2023)
The 22nd Print Edition (2023) includes 35 First Action Methods, 30 new SMPRs, 2 revised SMPRs, 19 Final Action Methods, 1 modified method, and 3 new appendices.
OMA Pricing
| Individual Member | Developing Country | Student | Non-member | |
| OMA online | $131 | $62 | $41 | $925 |
| OMA print | $767 | $767 | $767 | $1050 |
AOAC Individual Members Unlock Major Savings
Members unlock significant savings on both the three‑volume print set and the continuously updated online OMA. Join today to receive your member discount codes and instructions for how to purchase and apply them.
AOAC Organizational Members Unlock More Value
Unlock more value: Join AOAC as an Organizational Member and get complimentary OMA subscriptions included with your membership level. More access, more impact, more savings.
Contact AOAC
AOAC INTERNATIONAL [email protected]
Specific Method Questions: Email: [email protected]
Frequently Asked Questions
A Guide to Searching, Accessing, and Purchasing the OMA
• Searching the OMA online
• Search the Indices
• Search the Appendices
• Access Levels —Who Has Full OMA Access?
• Individual Member Discount Codes & Subscription Setup
• Individual Member OMA Pricing & Purchase Options
• OMA Online Purchase
• OMA Print Purchase
• OMA Single Method Purchase
• Information for Organizational Members
• Institutions & Resellers Purchasing Information
• Contact Oxford Academic
