Incoming Natural Corks - Average TCA Score
CQC Audit Results - June 2023
Analysis of natural cork shipments continues to demonstrate a steady reduction in the occurrence of the chemical compound associated with taint. Since the adoption of its chemical testing method, the California based Cork Quality Council has screened every shipment of natural corks its members have brought to their warehouses. Before CQC members accept any cork lot into inventory, screening samples undergo GC/MS analysis of 2,4,6-Trichloroanisole (TCA). Any cork lots that fail testing requirements are rejected and removed from inventory.
Historic results show major reductions in TCA
Last year, CQC members conducted over 25,000 analyses. Their combined screening records show a steady reduction in measurable TCA levels that are now 99% lower than the results seen when records were first tabulated in 2001.