Historical notice — this framework is no longer current. The former single-analyte 400 ppm dry-weight framework was replaced in July 2026. Use current official sources and contact the laboratory for reviewed testing and reporting information; this dated announcement remains available as release history.
This October 2025 update described two regulations that limited 7-hydroxymitragynine (7-OH) to 400 ppm (0.04%) on a dry-weight basis and implemented labeling requirements for kratom products.
To align with those former requirements, Cora Science introduced Test Code 813. When ordered alongside either our standard or expanded Mitragyna alkaloids assays, this package added moisture content analysis which our team then used to calculate the dry-weight corrected 7-hydroxymitragynine result, reported in ppm in a dedicated table at the end of the report.
Dry-weight correction normalizes results to 0% moisture so that ppm reflects the analyte concentration in the solids fraction. For reference, 400 ppm equals 400 mg/kg, equivalent to 0.04% w/w.
Conversion equation using measured moisture:
ppm(dry) = ppm(as-is) / (1 - moisture_fraction)- Unit conversions:
ppm = (% w/w) x 10,000;ppm = (mg/g) x 1,000
Historical example: a product shows 7-OH at 0.028 w/w% as-is with 12% moisture. The solids fraction is 0.88, so ppm(dry) = 280 / 0.88 = 318 ppm, below the former 400 ppm action limit.
Effective August 6, 2026, Test Code 813 is no longer offered as a standard catalog option. It may be available only by custom request, subject to advance technical review. For current Florida testing and calculated reporting options, contact us for technical review.
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