Overview
ISO 19824:2017 - Traditional Chinese medicine - Schisandra chinensis (Turcz.) Baill. seeds and seedlings - specifies minimum requirements and test methods for Schisandra chinensis seeds and 1‑year‑old seedlings. The standard defines sampling, grading criteria, laboratory tests and acceptance limits to ensure consistent quality of planting material used in Traditional Chinese Medicine (TCM), cultivation and trade.
Key topics and technical requirements
- Scope: Minimum requirements and test methods for Schisandra chinensis seeds and seedlings.
- General quality: Seeds must be clean, free of foreign odours and kidney‑shaped; seedlings must be healthy and intact. Quarantine pathogens (e.g., Fusarium spp., Alternaria spp.) and nematodes must not be detected.
- Seed limits:
- Moisture content ≤ 14%
- Purity ≥ 95%
- Viability (tetrazolium/ISTA methods) ≥ 80%
- Grading by seed width, 1 000‑seed weight and stratification rate (First/Second/Unqualified thresholds specified in the standard).
- Seedling limits (1‑year‑old):
- Stem diameter, height of stem, seedling weight, number of lateral roots graded into First/Second/Unqualified classes (numerical thresholds given in the document).
- Lateral and fibrous roots and the hibernaculum must be intact.
- Sampling: Seed sampling follows ISTA International Rules for Seed Testing. Seedling lots: maximum 300 000 seedlings; minimum composite sample 100 seedlings.
- Test methods referenced:
- ISTA procedures for 1 000‑seed weight and purity analysis
- Tetrazolium testing for viability
- Specific procedures for seed width, stratification rate, moisture, fungus and nematode testing, stem/height/weight measurements.
- Additional coverage: Test reporting, packaging, storage, transportation and marking requirements.
Applications and users
ISO 19824:2017 is intended for:
- Seed producers and nurseries producing Schisandra chinensis planting material
- Quality control and seed testing laboratories applying seed testing, viability and pathogen assays
- Herbal medicine suppliers, TCM manufacturers and agricultural buyers requiring certified planting stock
- Regulators, quarantine authorities and certification agencies monitoring compliance for domestic trade and exports
Practical uses include seed lot grading, procurement specifications, quarantine inspections, breeding program selection, and supply‑chain traceability for TCM raw material production.
Related standards
- ISTA - International Rules for Seed Testing (referenced for sampling, purity and weight methods)
- ISTA Working Sheets on Tetrazolium Testing (for viability assessment)
- ISO/TC 249 - technical committee for Traditional Chinese medicine
Keywords: ISO 19824:2017, Schisandra chinensis seeds, Schisandra seedlings, Traditional Chinese medicine, seed testing, seed viability, seed purity, stratification rate, Fusarium, Alternaria.
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