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Spectrophotometric method for hydroxymethylfurfural in honey.

Journal - Association of Official Analytical Chemists

|May 1, 1979

Summary

A new bisulfite method accurately quantifies hydroxymethylfurfural (HMF) in honey, improving upon existing optical and chemical techniques for reliable honey analysis.

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Area of Science:

Food Chemistry
Analytical Chemistry
Spectroscopy

Background:

Hydroxymethylfurfural (HMF) is a key indicator of honey quality and thermal processing.
Existing methods for HMF quantification in honey, such as optical and chemical Winkler methods, suffer from inaccuracies and interferences.
There is a need for a more precise and accurate method for HMF determination in honey.

Purpose of the Study:

To develop and validate a novel spectrophotometric method for quantifying hydroxymethylfurfural (HMF) in honey.
To enhance the accuracy and precision of HMF analysis in honey compared to established methods.
To provide a reliable tool for assessing honey quality and authenticity.

Main Methods:

A new method utilizing a sodium bisulfite solution as a reference to obtain a difference spectrum.
The difference spectrum isolates HMF absorption, minimizing interference from other honey components.
Recovery studies demonstrated an average of 97.5% for HMF additions ranging from 0.8 to 40 mg/100 g.

Main Results:

The novel bisulfite method yielded an average HMF content of 5.05 mg/100 g honey across 40 samples.
This result was comparable to the Winkler chemical method (4.83 mg/100 g) at a P = 0.05 significance level.
The new method offers improved accuracy and precision over traditional optical and chemical techniques for HMF analysis.

Conclusions:

The described bisulfite method provides a more accurate and precise determination of HMF in honey.
This method effectively overcomes the limitations of existing techniques by mitigating interfering absorptions.
The improved analytical approach supports better quality control and authenticity verification of honey products.

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