SIST-TP CEN/TR 17674:2021 PDF

Overview - CEN/TR 17674:2021 (Stable isotope ratios for bio-based verification)

CEN/TR 17674:2021 is a Technical Report from CEN/TC 411 that provides an overview of existing applications using stable isotope ratios of carbon (C), hydrogen (H), oxygen (O) and nitrogen (N) to verify the origin of bio-based feedstock and to characterise production processes of bio-based products. The report summarises laboratory methods, typical isotopic fingerprints (plant pathways C3/C4/CAM), measurement approaches and practical use-cases; it notes limited coverage of nitrogen and sulphur due to current lack of applications.

Key topics and technical requirements

• Measurement technologies: isotope ratio mass spectrometry (IRMS) in bulk and compound-specific modes:
  • EA‑IRMS (Bulk Stable Isotope Analysis, BSIA) for whole-sample elemental isotopes.
  • GC‑C/P‑IRMS or LC‑co‑IRMS for Compound Specific Isotope Analysis (CSIA).
• Data reporting: isotopic composition reported in delta (δ) notation relative to international standards.
• Analytical performance (typical uncertainties quoted):
  • δ13C: ±0.3 ‰, δ15N: ±0.3 ‰, δ2H: ±5 ‰, δ18O: ±1 ‰.
• Isotopic fingerprints:
  • C3 plants: δ13C ≈ −20 ‰ to −33 ‰
  • C4 plants (e.g., maize, sugarcane): δ13C ≈ −10 ‰ to −12 ‰
  • CAM plants (e.g., vanilla, pineapple): δ13C ≈ −10 ‰ to −24 ‰
• Authenticity and monitoring: examples include detection of synthetic vanillin vs. natural, honey adulteration (C4 sugar detection), and monitoring of industrial production routes.

Applications and who uses this standard

• Use cases:
  • Verification of bio-based feedstock origin and claims of bio-based content.
  • Authenticity testing of flavors, food ingredients, bio-plastics, bio-rubbers, biofuels, biosurfactants, biocosmetics and other bio-products.
  • Monitoring and verification of industrial production pathways and raw material sourcing.
• Primary users:
  • Analytical laboratories and IRMS specialists
  • Producers, suppliers and purchasers of bio-based materials
  • Certification bodies, inspection organizations and regulators
  • R&D teams developing bio-based products and sustainability audits

Related standards and references

• EN 16575:2014 (Bio-based products - Vocabulary) - normative reference in the report.
• Examples of referenced methods: CEN ENV 12140/12141/12142 (stable isotope analysis for fruit juices) and AOAC official methods for detection of C4 plant sugars in honey.
• Output is part of the CEN/TC 411 suite addressing bio-based content, LCA and sustainability.

CEN/TR 17674:2021 is a practical reference for integrating stable isotope analysis, IRMS techniques, and isotopic fingerprinting into quality control, authenticity verification and supply‑chain transparency for bio-based products.