oSIST prEN 17772:2026

oSIST prEN 17772:2026 is a draft European Standard from CEN for organic and organo-mineral fertilizers. It points to the methods used to determine total organic carbon and dry matter, so laboratories, manufacturers, and conformity assessors know which tests to apply when checking these products against EU fertilising-product requirements.

What does oSIST prEN 17772:2026 specify?

oSIST prEN 17772:2026 specifies references to the methods for two parameters in organic and organo-mineral fertilizers: total organic carbon content and dry matter content. It also sets a limit on where the total organic carbon method can be used and shows how the document is organized around short clauses and one informative annex.

The scope also says that the standards it references indicate when the methods apply to fertilizing product blends.

What are the key requirements of oSIST prEN 17772:2026?

oSIST prEN 17772:2026 is mainly a routing standard: it tells the reader which companion methods to use, and where the limits of those methods are. That matters because users need to select the right analytical method before testing, reporting, or claiming conformity.

Sampling and sample preparation

Clause 4 states that sampling and sample preparation are crucial for validity, but it does not give the sampling procedure itself. Instead, it sends users to the analytical methods listed in Clause 5, so anyone testing these fertilizers must follow the sample handling steps in the referenced method standards.

Total organic carbon

Clause 5.1 requires total organic carbon to be determined in accordance with prEN 17776:2026. In practice, this means the document does not define a separate carbon test here; it tells users to use the dedicated dry-combustion method in the companion standard.

Dry matter

Clause 5.2 requires dry matter to be determined in accordance with prEN 17773:2026. For laboratories and buyers, this means the dry matter result must come from the referenced method, not from an alternative in-house procedure unless that procedure is otherwise accepted.

Limits on the TOC method

The scope excludes products containing urea-formaldehyde polymers or urea from the total organic carbon method until a method is available to assess carbon in those compounds. It also states that carbon in those compounds is not considered organic, which matters when deciding whether a sample falls within the method’s intended use.

Conformity to EU rules

Annex ZA links Clause 5.1 and Clause 5.2 to the essential requirements of Regulation (EU) 2019/1009 for PFC 1(A) and PFC 1(B). In practice, this is the part users look at when they want to understand how the document supports conformity work for EU fertilising products.

What terms does oSIST prEN 17772:2026 define?

oSIST prEN 17772:2026 uses the vocabulary in prEN 12944-1:2026 and prEN 12944-2:2026. The following terms and abbreviations are central to the document:

• Total organic carbon (TOC) - the carbon parameter measured under Clause 5.1 for the fertilizers covered by the document.
• Dry matter - the parameter measured under Clause 5.2 to show the non-water portion of the sample.
• Organic fertilizers - one of the product groups named in the title and in Annex ZA.
• Organo-mineral fertilizers - the second product group named in the title and in Annex ZA.
• Product function category (PFC) - the regulatory category used in Regulation (EU) 2019/1009 to connect test results with product requirements.
• PFC 1(A) - the regulation category referenced for organic fertilizers in Annex ZA.
• PFC 1(B) - the regulation category referenced for organo-mineral fertilizers in Annex ZA.

Who uses oSIST prEN 17772:2026?

oSIST prEN 17772:2026 is used by fertilizer manufacturers, testing laboratories, quality managers, and conformity assessment bodies working with organic and organo-mineral fertilizers. It is also relevant for organizations checking compliance with Regulation (EU) 2019/1009, because it points to the methods used to measure the listed parameters. In practice, users apply it when they need the right test method, a conformity file, or a technical basis for product specification.

What changed in oSIST prEN 17772:2026 from the previous edition?

oSIST prEN 17772:2026 replaces CEN/TS 17772:2022. CEN states that the main changes are adoption of the Technical Specification as a European Standard with the addition of Annex ZA, plus a revised introduction, revised sampling, and a revised bibliography.

Which standards are used with oSIST prEN 17772:2026?

oSIST prEN 17772:2026 relies on these referenced standards:

• prEN 12944-1:2026 - provides general fertilizer vocabulary used in Clause 3.
• prEN 12944-2:2026 - provides fertilizer-specific vocabulary used in Clause 3.
• prEN 17773:2026 - gives the method for determining dry matter content.
• prEN 17776:2026 - gives the method for determining total organic carbon content by dry combustion.

These referenced standards are the actual test-method documents that oSIST prEN 17772:2026 points to.

What does the oSIST prEN 17772:2026 document contain?

oSIST prEN 17772:2026 contains a short, method-referencing structure rather than a full laboratory procedure. Its content runs from scope and normative references to terms and definitions, then sampling and sample preparation, then the two parameter clauses, followed by Annex ZA and a bibliography. Annex ZA includes a correspondence table that links the clause on each parameter to the relevant parts of Regulation (EU) 2019/1009.