Abstract:  The activity of enzymes in honey is reduced during heating process,and injurant hydroxymethylfurfural(HMF) forms synchronously. In this paper,we studied thermostability of Chinese date honey which was submerged in an isothermal thermostatic at different temperatures ,diastatic number,invertase number and HMF content of Chinese date honey were determined by spectrophotometry,potassium ferricyanide titration method and ultraviolet spectrophotometry,respectively. The results obtained showed that,in different temperatures,regressive equations of relative activity of diastase vs. heating time is RAA=exp(-kat),relative activity of invertase in Chinese date honey RAI=exp(-kit),and HMF content of Chinese date honey HMF=HMF0exp(kht). Ka,ki,and kh depend on temperature. Finally ,the best heat processing parameters of Chinese date honey are that heating time does not last more than 8.1h or 1.7h at temperature 45℃ or 50℃.

Key words: Chinese date honey, diastase, invertase, HMF, thermostability