oil absorption. the dbp absorption capacity is influenced by other parameters, such as the particle size. . sio content silicon dioxide content is determined gravimetrically by fuming off with hydrofluoric acid. the sulphate and chloride contents are determined by potentiometric titration. . sieve residue...
hardens. after drying for hours at c, let cool in a desiccater. after cooling, weigh the evaporation dish and determine the weight difference a (mg) before and after evaporation, then use the following equation to calculate the amount of evaporation residue. evaporation residue (g/ml) = [(a – b) ...