Flow injection analysis of 5-(hydroxymethyl)-2-furaldehyde in honey by a modified winkler method

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Castoldi, Karine [UNESP]
Milani, Maria Izabel [UNESP]
Rossini, Eduardo L. [UNESP]
Pezza, Leonardo [UNESP]
Pezza, Helena R. [UNESP]

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One of the quality indicators for honey is 5-(hydroxymethyl)-2-furaldehyde (HMF), which is formed during the heating or aging of honey. The International Honey Commission recommends three methods for the determination of HMF in honey: the Winkler method, the White method, and determination by HPLC. The Winkler method uses the carcinogenic substance p-toluidine, which is not in accordance with the principles of Green Chemistry. The present work describes the determination of HMF in honey by flow injection analysis (FIA) using a modified Winkler method, replacing p-toluidine with p-aminobenzoic acid. The linear range was 1.00 to 40.0 mg L-1, the limit of detection (LOD) was 0.43 mg L-1, and the limit of quantification (LOQ) was 1.32 mg L-1. The method is an efficient and environmentally friendly technique for the analysis of HMF in honey.



5-(hydroxymethyl)-2-furaldehyde (HMF), Flow injection analysis, Honey, P-aminobenzoic acid

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Analytical Sciences, v. 32, n. 4, p. 413-417, 2016.