Characterisation of honey produced from different fruit plants of northern India.

Studies were carried out to determine the affect of different fruit plant sources viz., Litche chinensis (litchi) , Citrus sinensis (sweet orange) , Ziziphus mauritiana (ber) and Prunus persica (peach) on moisture content, pH, free acidity, reducing sugars and sucrose contents, fructose/glucose ratio, ash and proline content, invertase and diastase activities, hydroxymethylfurfural and mineral (sodium, potassium, iron, calcium, zinc, and copper) contents as well as on rheological properties of honey. The source of honey had a significant ( P < 0.05) effect on moisture content, free acidity, reducing sugar, fructose/glucose ratio, hydroxymethylfurfural content, invertase and diastase activities, sucrose content, proline content, ash content, pH and mineral content. The honey from various sources exhibited Newtonian behaviour and the activation energy ranged from 63.63 to 81.48 kJ mol−1. Pattern recognition methods such as principal component analysis andlinear discriminate analysis were performed to classify honey on the basis of physico-chemical properties and mineral content. The variables proline, potassium and free acidity exhibited higher discrimination power. [ABSTRACT FROM AUTHOR]