Overview
ISO 7177:2023 - Traditional Chinese medicine - Coptis chinensis and Coptis japonica rhizome specifies minimum requirements and test methods for Coptis rhizome (dried rhizome of Coptis chinensis Franch. and Coptis japonica Makino.). The standard applies to whole Chinese materia medica and decoction pieces, and focuses on identity, purity and safety parameters to support consistent quality, international trade and regulatory compliance for this commonly used TCM herb.
Key topics and technical requirements
- Identification and description
- Macroscopic and microscopic characteristics for Coptis chinensis and Coptis japonica (shape, size ranges, surface features, colour, odour and taste).
- Microscopic features (cork layers, cortex, stone cells, vascular bundles) and common adulterant identification.
- Analytical methods
- Thin-layer chromatography (TLC) identification (Annex A) - required fluorescent spot pattern matching reference.
- Marker compound determination (Annex B) - quantification of alkaloids such as berberine, epiberberine, coptisine and palmatine (HPLC-UV method described).
- Quality and safety limits
- Moisture ≤ 14.0% (mass fraction)
- Total ash ≤ 5.0% (mass fraction)
- Acid-insoluble ash ≤ 2.5% (mass fraction)
- Determination of heavy metals (As, Hg, Pb, Cd) and pesticide residues required.
- Sampling and testing
- Packaging, storage and labelling
- Guidance aligns with ISO 22217 (storage) and ISO 21371 (labelling) for decoction pieces and raw material handling.
Applications and who uses it
ISO 7177:2023 is used by:
- Quality control laboratories and analytical chemists validating TLC and HPLC-UV methods for Coptis rhizome.
- Herbal raw material suppliers, growers and processors to meet minimum quality specs for Coptis chinensis and Coptis japonica.
- Manufacturers of decoction pieces and finished TCM products to ensure ingredient compliance and safety (heavy metals, pesticides).
- Regulators, customs authorities and standards bodies harmonizing trade requirements for Traditional Chinese Medicine (TCM) ingredients.
- Researchers and pharmacopoeia committees benchmarking marker compound assays and identity tests.
Practical benefits include improved batch-to-batch consistency, reduced adulteration risk, safer herbal products, and smoother international trade for Coptis rhizome.
Related standards
Normative references cited in ISO 7177:2023 include:
For national implementation details and example values, see Annex C of ISO 7177:2023.
