title: Spectrophotometric method for hydroxymethylfurfural in honey.
abstract: A new method is described for hydroxymethylfurfural (HMF) in honey; accuracy and precision are improved over the most used optical and chemical methods. With a clarified honey solution containing 0.1% sodium bisulfite as reference and a similar solution without bisulfite as sample, a difference spectrum is obtained which represents only the HMF in the sample, without the interfering absorption of the honey. The average recovery was 97.5% for 24 additions to honey of 0.8--40 mg HMF/100 g. Forty honey samples ranging from 0 to 40 mg/100 g were analyzed by 3 methods with the following average results: Winkler optical method, 7.25; Winkler chemical method, 4.83; and new bisulfite method, 5.05 mg HMF/100 g honey. Values by the latter 2 methods did not differ at the P = 0.05 significance level.
mesh_terms: D005506:Food Contamination / Q000032:analysis*; D005662:Furaldehyde / Q000031:analogs & derivatives* / Q000032:analysis; D006722:Honey / Q000032:analysis*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D005662:Furaldehyde