Geochemical Signature
Isotopic ratios provide an objective origin assessment for flax crops based on the mineral content of regional soil. Strontium 87 86 measures the relative abundance of two specific isotopes within plant fibers to establish a geographic fingerprint. This numerical value remains constant throughout the extraction and spinning process, allowing technicians to verify that the raw material matches the labeled provenance.
Laboratory Protocol
Examiners apply mass spectrometry to samples collected at the retting stage to determine the specific ratio of strontium isotopes. A higher proportion of the heavier isotope points to older geological formations, whereas lower ratios often identify younger alluvial deposits. The mill maintains this data within the material passport for every flax batch.
Precise calibration of the spectrometer prevents interference from strontium present in fertilizers or processing chemicals added later. Comparison against localized soil maps yields a high confidence determination of the field of harvest.
Production Integrity
Fiber shipments undergo verification at the spinning mill to ensure consistency between the supplier declaration and the analytical findings. Auditors utilize the documented isotope ratio to track raw material flow from the primary farm through the subsequent weaving and finishing operations. Discrepancies between the initial certification and the mill analysis trigger an investigation into the supply chain.
Standardized testing of this signature prevents the substitution of low cost fibers for high quality regional varieties during the preparation of yarn.
