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Standards Development
This amendment to EN 14078 clarifies when a correction related to differences in average molecular mass between the FAME material used for calibration and the sample is necessary, taking into account the significance of the difference relative to the reproducibility of the method. The amendment revises Clause 9.3 accordingly to ensure consistent interpretation and application by laboratories.
The amendment does not change the principle of the method, the analytical procedure, or the performance characteristics of EN 14078, and avoids unnecessary use of correction factors in routine testing.
Feedback received from laboratories, method users, and experts during the formal vote, and subsequent discussions within CEN/TC 19/JWG 1 has indicated a clear need for clarification of Clause 9.3 in EN 14078. Stakeholders reported differing interpretations of the current wording, particularly regarding when the correction related to differences in the average molecular mass of the FAME material used for calibration and of the FAME material used in the sample is necessary. This has resulted in uncertainty for users applying the method in routine testing.
The proposed amendment addresses this identified market need by clarifying the conditions under which a correction is necessary. By incorporating agreed technical guidance from CEN/TC 19/JWG 1 explanatory letter N 612 directly into the normative text, the amendment resolves ambiguities related to differences in the average molecular mass of the FAME material used for calibration and of the FAME material used in the sample. This clarification supports consistent application of the method across laboratories, improving confidence in reported results and reducing the risk of misunderstandings between laboratories, customers, and regulatory bodies.
Overall, the proposed amendment enhances the clarity and market relevance of EN 14078 by ensuring that the correction is applied only when technically justified, thereby supporting reproducible, comparable, and reliable determination of FAME content in diesel fuel.
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