Evaluating soluble and insoluble ash, alkalinity of soluble and insoluble ash and total alkalinity of ash in honey using electrical conductivity measurements at 20 °CM.T. Sancho, S. Muniategui, P. Sánchez, J.F. Huidobro and J. Simal-Lozano
Facultad de Farmacia, Area de Nutrición y Bromatología, 15706 Santiago de Compostela (Galicia), Spain
Abstract - In 30 samples of Basque Country (Spain) honey, relations were established between electrical conductivity measured at 20 °C in solutions of 10 g of honey in 75 ml of water, and soluble and insoluble ash contents, total alkalinity, and alkalinity of the soluble and insoluble ash. Correlations for these relations were best for total alkalinity of ash, soluble ash and its alkalinity; these values could be predicted from electrical conductivity at 20 °C. Poorer correlations (r = 0.58) were found for the relations involving the insoluble ash but these were expected since amounts of this type of ash were very small, and determination involves several more steps than for soluble ash determination.
Key words: honey / electrical conductivity / soluble ash / insoluble ash / ash alkalinity