Ethereal Botanical | Ethereal Essence | Chip Quality | Oil Quality Marker | Oil Quality Chart
Agarwood chip quality assessment is often done visually (resin content, density, aroma, color, sinking test), but GC–MS (Gas Chromatography–Mass Spectrometry) allows a chemical profile–based classification that helps standardize quality.
Key GC–MS Chemical Markers
- Sesquiterpenes (main aroma compounds)
- Agarospirol
- Jinkoh-eremol
- Baimuxinal
- Guaiene-type sesquiterpenes
Higher abundance = better quality.
- Chromones (2-(2-phenylethyl)chromones, PECs)
- Characteristic resin compounds unique to agarwood.
- Associated with deep, long-lasting fragrance.
More chromones = higher grade.
- Other Quality Indicators
- High ratio of sesquiterpenes + chromones
- Low unwanted fatty acids, waxes, and impurities.
GC–MS-Based Chip Quality Levels
| Grade | GC–MS Profile | Typical Chip Quality |
|---|---|---|
| Super Premium (Kyara / Top Grade) | Very high chromone + diverse sesquiterpenes; clean peaks, strong Agarospirol signal | Dark, resin-rich, sinking chips, rare |
| High Quality | High sesquiterpene content, good chromone levels | Dense chips, strong aroma, dark brown |
| Medium Quality | Moderate sesquiterpenes, low chromones, some fatty compounds | Lighter chips, uneven resin |
| Low Quality / Mixed | Weak or absent chromones, dominated by non-aromatic compounds | Pale wood, weak scent, low resin |
Conclusion:
GC–MS provides a scientific basis for agarwood chip grading beyond just visual or olfactory methods. Premium chips show clear GC–MS peaks of Agarospirol, Jinkoh-eremol, and chromones, while lower grades lack these markers.