Ultrasonic Extraction of Pandan Leaf: Why Low-Temperature Processing Preserves Aroma Compounds for Beverage Applications
Formulator’s summary: Pandan leaf (Pandanus amaryllifolius) is prized in beverage formulation for its grassy-sweet aroma, which comes primarily from 2-acetyl-1-pyrroline (2AP) — the same compound responsible for the fragrance of jasmine rice. 2AP is highly volatile and thermally labile, meaning conventional high-temperature extraction methods degrade or evaporate it before it reaches the finished product. Ultrasonic extraction at controlled low temperatures recovers 2AP and related aroma compounds more effectively by using acoustic cavitation to rupture plant cell walls without sustained heating. The resulting standardised extract disperses readily in water, making it suitable for ready-to-drink beverages, cordials, sachet drink mixes and functional beverage premixes where a clean, natural pandan aroma is the primary sensory contribution. A specification that names 2AP as the target marker and confirms the extraction temperature on the certificate of analysis is what separates a genuine aroma-preserving extract from a crude ground-leaf powder that smells of little.
Quick facts for formulators
- Botanical: Pandanus amaryllifolius, leaf
- Primary aroma marker: 2-acetyl-1-pyrroline (2AP)
- Extraction method: Patented enzymatic ultrasonic extraction (MY-188945-A)
- Key processing advantage: Low-temperature cavitation preserves volatile aroma compounds
- Solubility: Water-dispersible; available as both extract powder and liquid concentrate
- Sensory contribution: Grassy-sweet, coconut-vanilla aroma with rice-like warmth
- Best applications: Ready-to-drink beverages, cordials, sachet drink mixes, functional beverage premixes
- Certifications: FSSC 22000, JAKIM Halal, GMP, HACCP, MeSTI, US FDA facility registration
Why pandan aroma is volatile and heat-sensitive
The characteristic fragrance of pandan leaf comes from a complex profile of volatile compounds, among which 2-acetyl-1-pyrroline (2AP) is the most significant. 2AP is the same aroma compound that gives jasmine rice and basmati their distinctive smell, and it is present in pandan at concentrations that make the leaf one of the richest natural supplies of this compound. A comprehensive aroma-profile characterisation of Pandanus amaryllifolius using HS-SPME-GC-O-MS and HS-GC-IMS technology confirmed 2AP as a dominant odour-active compound alongside other volatiles contributing to the plant’s grassy-sweet scent (Tang et al., Foods, 2025; PMID 40231908).
The problem for formulators is that 2AP has a low boiling point and degrades rapidly at elevated temperatures. Conventional extraction methods that rely on prolonged heating — such as decoction, hot-water maceration or steam distillation — volatilise 2AP into the extraction solvent vapour or degrade it through thermal oxidation. The result is an extract that smells weak, flat or merely vegetal rather than carrying the bright, sweet aroma that makes pandan valuable in the first place. A review of nutritional and functional innovations in Pandanus amaryllifolius noted that the aroma chemistry is central to the ingredient’s commercial value and that processing conditions directly affect aroma retention (Khoo et al., Journal of the Science of Food and Agriculture, 2026; PMID 42244025).
The key aroma compound: 2-acetyl-1-pyrroline (2AP)
2-Acetyl-1-pyrroline is a five-membered nitrogen-containing heterocyclic compound with an acetyl substituent. It is one of the most potent aroma compounds known, with an extremely low odour detection threshold — meaning even small quantities are perceptible to the human nose. In pandan leaf, 2AP occurs alongside other volatiles including diacetyl, 3-methylbutanal and various pyrroline derivatives, but 2AP is the compound most strongly associated with the characteristic pandan fragrance.
For procurement purposes, 2AP is the marker compound that distinguishes a genuine aroma-preserving pandan extract from a crude ground-leaf powder. A supplier that has invested in low-temperature extraction should be able to discuss 2AP recovery on the specification sheet; a supplier that cannot name the compound is likely selling a commodity powder with no aroma guarantee.
Conventional extraction vs ultrasonic extraction
The extraction method determines how much 2AP survives into the finished extract. The table below compares the two principal approaches.
| Parameter | Conventional maceration / hot-water extraction | Ultrasonic extraction (low-temperature) |
|---|---|---|
| Temperature | Typically 60–100 °C; sustained heating | Controlled low temperature; cavitation does the work |
| Mechanism | Thermal diffusion across cell walls | Acoustic cavitation ruptures cell walls mechanically |
| 2AP retention | Low — 2AP volatilises or degrades at sustained high temperature | Higher — low processing temperature preserves volatile aroma compounds |
| Extraction time | Hours to days for maceration | Shorter — cavitation accelerates mass transfer |
| Solvent exposure | Prolonged contact with heated solvent | Brief contact at controlled temperature |
| Finished extract aroma | Weak, flat or vegetal | Bright, sweet, characteristic pandan fragrance |
A study specifically examining ultrasonic extraction of 2-acetyl-1-pyrroline from Pandanus amaryllifolius demonstrated that ultrasound-assisted extraction is a viable method for recovering 2AP from pandan leaf, with the extraction conditions — including temperature, solvent concentration and sonication time — directly affecting 2AP yield (Azhar et al., Molecules, 2022; PMID 35956856). This is an in vitro extraction study, not a human clinical trial, and it confirms the processing principle rather than making any health claim.
What low-temperature ultrasonic processing preserves
Ultrasonic extraction works through acoustic cavitation: high-frequency sound waves create microscopic bubbles in the extraction liquid, which collapse violently against plant cell walls, rupturing them and releasing intracellular contents — including volatile aroma compounds — into the solvent. Because the energy is delivered mechanically rather than thermally, the bulk liquid temperature stays low, and heat-sensitive compounds like 2AP are not subjected to the sustained heating that destroys them in conventional processes.
Bionutricia’s pandan extract is produced using patented enzymatic ultrasonic extraction (MY-188945-A), which combines enzymatic pre-treatment with ultrasonic cavitation. The enzymatic step breaks down structural polysaccharides in the leaf cell wall, making the cell contents more accessible to the ultrasonic extraction that follows. The combined process operates at controlled low temperature, preserving the volatile aroma profile that conventional hot-water extraction would lose.
Solubility and dispersion in beverage systems
Pandan extract is supplied in two physical forms, each suited to different beverage applications:
- Extract powder: A fine, free-flowing powder that disperses in water with gentle stirring. Suitable for sachet drink mixes, dry powder blends and functional beverage premixes where a dry-format ingredient is required. Bloom in a small volume of warm water before adding to the main batch to ensure uniform dispersion.
- Liquid concentrate: A standardised liquid that disperses readily in cold water without blooming. Preferred for ready-to-drink beverages and cordials where a liquid ingredient doses more precisely and integrates without a hydration step.
In a clear ready-to-drink beverage, pandan extract contributes a soft sage-green colour from chlorophyll — not the fluorescent green of artificially coloured pandan-flavoured products. The colour is muted and may shift toward olive-brown in acidic conditions or with prolonged light exposure, which is a formulation consideration for shelf-stable RTD products. In opaque or cloudy beverages, cordials and dairy systems, the colour contribution is less critical and the aroma is the primary functional attribute.
Standardised extract vs crude ground-leaf powder
The distinction between a standardised pandan extract and a crude ground-leaf powder is a specification and quality-control difference, not a health claim. A standardised extract has been processed to concentrate the aroma compounds — with 2AP as the marker — and the extraction method, concentration ratio and aroma profile are documented on the certificate of analysis. Batch-to-batch consistency is verifiable: the COA confirms that each lot meets the same aroma specification.
A crude ground-leaf powder is simply dried pandan leaf milled to a fine particle size. It contains whatever aroma compounds survived the drying process, with no concentration step, no marker assay and no batch consistency guarantee. It is cheaper, weaker and less predictable — a formulator using it will find that aroma intensity varies between lots and fades faster in storage. For a beverage product where pandan aroma is a selling point, a standardised extract produced by low-temperature ultrasonic processing is the grade to specify.
Supplying pandan extract and related ingredients in bulk
Bionutricia Extract supplies standardised pandan leaf extract in both powder and liquid concentrate forms, produced under patented enzymatic ultrasonic extraction (MY-188945-A) in a facility holding FSSC 22000, GMP, HACCP, JAKIM Halal, MeSTI and US FDA facility registration. Every batch ships with a certificate of analysis. Bulk supply, custom specification and extract ratio, spray-dried and powder forms, documentation and export paperwork, and packing options are available on request.
Buyers formulating pandan into beverage systems may also need companion ingredients from the published range: roselle (hibiscus) extract liquid concentrate for a complementary tart-floral beverage profile, or pandan leaf liquid concentrate for ready-to-drink applications where a liquid format is preferred. The guide to formulating botanical extracts into functional beverages covers compatibility and stability considerations across multiple botanical ingredients in beverage systems.
For specifications, samples, and bulk quotations, contact our team or message us on WhatsApp at +60 16-661 8510.
Order sample quantities or bulk standardised pandan extract from our eStore at https://bionutriciaextract.com/product/pandan-leaf-pandanus-amaryllifolius-standardized-extract-powder/.
Related ingredient guides
- Pandan Powder: What It Is, How to Use It and What to Buy
- Formulating Botanical Extracts into Functional Beverages
- Why a “Water-Soluble” Extract Can Still Cloud Your Drink
Frequently asked questions
Why does ultrasonic extraction preserve pandan aroma better than conventional maceration? Ultrasonic extraction uses acoustic cavitation to rupture plant cell walls mechanically, releasing aroma compounds into the solvent without sustained high-temperature heating. Because 2-acetyl-1-pyrroline (2AP) — pandan’s primary aroma compound — is volatile and thermally labile, the low processing temperature prevents it from evaporating or degrading during extraction. Conventional hot-water maceration exposes 2AP to prolonged heat, which volatilises or oxidises the compound before it reaches the finished extract.
What is 2-acetyl-1-pyrroline and why is it the marker compound for pandan extract? 2-Acetyl-1-pyrroline (2AP) is the volatile compound most strongly associated with pandan’s characteristic grassy-sweet fragrance. It is the same compound that gives jasmine rice its aroma. Because 2AP is the dominant odour-active compound in pandan leaf, it is the natural marker for confirming that an extract has preserved the plant’s true aroma profile. A specification that names 2AP and confirms low-temperature processing is what separates an aroma-preserving extract from a crude powder.
Should I specify pandan extract powder or liquid concentrate for a ready-to-drink beverage? For ready-to-drink beverages, a liquid concentrate is typically preferred because it disperses in cold water without a hydration step and doses precisely by volume. Extract powder is better suited to sachet drink mixes and dry powder blends where a dry-format ingredient is required. Both forms carry the same standardised aroma profile; the choice is a formulation and handling decision.
How stable is pandan aroma in a finished beverage over shelf life? Pandan aroma fades gradually over time in any finished beverage, and the rate depends on pH, light exposure, temperature and the presence of oxygen. A standardised extract produced by low-temperature ultrasonic processing starts with a higher 2AP concentration, giving the finished product more aroma headroom. Accelerated shelf-life testing in the specific beverage matrix is the only reliable way to confirm aroma retention over the target shelf life.
What should I look for on the COA when buying pandan extract for beverage formulation? Request botanical identity (Pandanus amaryllifolius), extraction method (ultrasonic, low-temperature), concentration ratio, solubility data, microbial limits, heavy metals, and — where the supplier can provide it — 2AP content or an aroma-profile specification. The COA should confirm batch-to-batch consistency against the same specification every time.
