Overview
ISO 7927-1:2023 - Spices and condiments - Fennel seed, whole or ground - Part 1: Bitter fennel seed specification (Foeniculum vulgare P. Miller var. vulgare) defines quality, safety and labelling requirements for commercially traded bitter fennel seed (commonly called “fennel seed”), available whole or ground. The standard covers sensory attributes, contamination limits, chemical criteria, sampling, test methods, packaging/marking and storage/transport guidance (Annex A). It complements ISO 7927-2, which addresses sweet fennel.
Key topics and technical requirements
- Identity and sensory: Product must have characteristic odour and an aniseed flavour, free from mustiness or foreign flavours.
- Fenchone (marker compound): The volatile oil fraction must contain not less than 15% fenchone (area %) as determined by ISO 6571 and ISO 11024‑1/2 to distinguish bitter from sweet fennel.
- Contaminants and freedom from pests:
- Free from living insects and moulds; practically free from dead insects, fragments and rodent contamination (visible with up to ×10 magnification).
- Specific test methods referenced (e.g., ISO 1208 for filth in disputes).
- Extraneous and foreign matter:
- Extraneous matter (plant parts of same species) in whole seed: ≤ 0.5% (mass fraction) (ISO 927).
- Non-animal foreign matter: ≤ 0.5% (mass fraction); for direct consumer sale, product should be free of foreign matter.
- Grading (defective seeds): Maximum defective seeds by grade - Grade 1: ≤ 3.0%, Grade 2: ≤ 5.0%, Grade 3: ≤ 9.0%.
- Chemical requirements:
- Whole bitter fennel: moisture ≤ 12.0%, volatile oil ≥ 1.0 ml/100 g (dry basis), total ash ≤ 10.0% (dry basis), acid‑insoluble ash ≤ 2.0% (methods: ISO 939, ISO 6571, ISO 928, ISO 930).
- Ground bitter fennel: moisture ≤ 10.0%, volatile oil ≥ 0.8 ml/100 g, same ash limits; must pass 500 µm sieve.
- Sampling and test methods: Sampling per ISO 948; ground-sample preparation ISO 2825; chromatographic profiling guidance ISO 11024‑1/2.
Practical applications and users
- Who uses it: spice growers, processors, quality control laboratories, food manufacturers, importers/exporters, regulatory authorities and retailers.
- Why it matters:
- Ensures consistent product quality, authenticity (fenchone content), and safety (pest/foreign‑matter limits).
- Supports specification-based purchasing, contract compliance, lab testing protocols and traceability (harvest year, batch coding, best-before date).
- Helps maintain shelf-life and sensory quality through recommended packaging and storage practices.
Related standards
Keywords: ISO 7927-1:2023, bitter fennel, fennel seed specification, Foeniculum vulgare, fenchone, volatile oil, spices and condiments, moisture content, sampling, packaging.