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How honey is tested

The laboratory panel behind every honey specification, method by method: what each test measures, what it costs, and what a clean result does not rule out.

Quality, testing and standardsReviewed 2026-08-03

The routine panel

These are the measurements written into the Codex standard and the EU directive. They are cheap, fast and widely available, and between them they establish whether a honey meets its specification. None of them is an authenticity test.

Routine compositional testing
MethodMeasuresTypically establishes
RefractometryRefractive index, converted to water contentWhether the honey will keep or ferment
HPLC or HPAECThe individual sugars and their proportionsSugar spectrum, sucrose limit, fructose-to-glucose ratio
SpectrophotometryHydroxymethylfurfuralHeating and storage history, freshness
Enzyme assayDiastase numberHeating and storage history, read against HMF
Conductivity meterElectrical conductivity of a solutionBlossom honey versus honeydew; supports floral claims
TitrationFree acidity, pHRipeness, early fermentation
MicroscopyPollen types and their proportionsBotanical and geographic origin
Sensory panelAroma, flavour, defects, against reference descriptionsWhether a monofloral honey is recognisably that honey

The authenticity panel

Detecting added syrup is a different problem. The adulterant is sugar, the honey is sugar, and modern syrups are engineered specifically to survive the standard tests. What follows are the methods that actually work, in rough order of cost.

  1. Stable carbon isotope ratio analysis (SCIRA or EA-IRMS)Plants fix carbon by different photosynthetic pathways, and cane and maize are C4 plants while nearly all nectar plants are C3. Comparing the isotope ratio of the honey with that of its own extracted protein reveals C4 sugar addition down to a few per cent. It is the long-standing workhorse — and it is blind to syrups made from C3 crops such as rice, beet and wheat.
  2. Nuclear magnetic resonance profilingProduces a broad fingerprint of the sample and compares it against a large reference database of authentic honeys. It catches things no targeted test looks for, including syrups the analyst did not have in mind. Its power is entirely a function of the database behind it, which is commercially held and unevenly representative of the world's honeys.
  3. Marker compound screening by LC-MSLooks for specific traces left by syrup manufacture — particular oligosaccharides, mannose, or processing residues. Effective against known syrup types and a step behind each new one.
  4. Pollen analysisA honey with no pollen has been ultrafiltered, which the EU directive treats as no longer honey. A honey whose pollen assemblage contradicts its stated origin is misdescribed regardless of what its sugars say.

What testing cannot settle

  • Whether a honey is good. Every test here measures composition and history. None measures whether anyone enjoys eating it.
  • Whether it is worth the price. Rarity, labour and provenance set price, and no instrument reads them.
  • Geographic origin, without a reference set. Isotope and trace element methods compare against authenticated regional samples, and where those do not exist the method has nothing to say.
  • Whether a beekeeper treated their bees well. There is no analytical marker for husbandry.

The claims on this page

Every substantive claim is placed on a tier, and the top two tiers must also state what they are not claiming.

Emerging research

Real studies exist and point somewhere, but they are small, in vitro, in animals, or not yet replicated. Direction is not the same as a result.

Emerging research

Carbon isotope testing detects cane and maize syrup in honey but not syrups made from rice, beet or wheat.

The method depends on the difference between C4 and C3 photosynthetic pathways. Sugar cane and maize are C4; rice, beet, wheat and nearly all nectar plants are C3, so a C3-derived syrup has an isotope ratio close to that of the honey itself. This limitation is well documented in the analytical literature and is the reason the field moved towards NMR profiling and marker screening.

What this does not claim: This is not a claim that carbon isotope testing is unreliable or should be abandoned. It remains a validated method for the adulterants it was designed to detect. The claim is about scope: a clean C4 result rules out one family of syrups and says nothing about the others.

  • Analytical approaches to honey authentication — Peer-reviewed food-analysis literature · Peer-reviewed article

Sources

  • HoneyHQ editorial synthesis — HEKNO Ltd · HoneyHQ synthesis
  • Analytical approaches to honey authentication — Peer-reviewed food-analysis literature · Peer-reviewed article
  • Standard for Honey (CXS 12-1981) — Codex Alimentarius Commission, FAO/WHO (1981) · Standards document Link
  • Council Directive 2001/110/EC relating to honey — Council of the European Union (2001) · Regulatory guidance Link

How sources are selected and weighted is set out in the sources and evidence policy.

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