Overview
ISO 3053:2004 defines quality characteristics and test methods for oil of grapefruit (Citrus × paradisi Macfad.) obtained by expression. The standard is intended to facilitate consistent assessment of grapefruit essential oil used in flavors, fragrances, cosmetics and related industries. It specifies physical properties, compositional limits and required analytical techniques (GC and HPLC) to verify identity and quality.
Key topics and requirements
- Scope: Specifies characteristics of expressed grapefruit oil to facilitate quality assessment.
- Appearance & odour: Clear liquid (possible traces of wax); fresh citrus‑like odour characteristic of grapefruit peel.
- Physical constants:
- Relative density at 20 °C (d20): 0.852 – 0.860
- Refractive index at 20 °C: 1.474 – 1.479
- Optical rotation at 20 °C: +91° to +96°
- Chemical limits:
- Total aldehydes (expressed as decanal): 0.28% – 2.00%
- Residue on evaporation: maximum 10%
- Chromatographic profile (normative):
- Analysis by gas chromatography (GC) is mandatory; proportions of representative components are specified (for example limonene 92–96%, myrcene 1.5–2.5%, α‑pinene 0.2–0.6%, nootkatone 0.01–0.8%, etc.).
- HPLC profiling for furanocoumarins and related compounds (e.g., bergamottin, bergapten) is presented in informative Annex B.
- Flashpoint: Informative mean value +43 °C (Annex C) - method/equipment noted.
- Sampling & test portions: See ISO 212; minimum test sample volume 25 ml to permit all tests.
Applications and users
ISO 3053:2004 is used by:
- Essential oil producers and packers to specify product quality for oil of grapefruit.
- Quality control and analytical laboratories performing GC/HPLC identity and purity testing.
- Flavor, fragrance and cosmetic manufacturers requiring supplier specifications and acceptance criteria.
- Regulatory bodies, transport and insurance organizations assessing safety data (flashpoint information) and compliance.
- Buyers and formulators who need reproducible, standardized compositional data for formulation and labeling.
Practical uses include raw material acceptance testing, supplier specifications, authenticity verification, stability checks, and safety classification.
Related standards
Keywords: ISO 3053:2004, oil of grapefruit, Citrus x paradisi, expressed essential oil, chromatographic profile, refractive index, relative density, optical rotation, aldehydes, limonene.