We could observe the changes in a shape and width of peak at 950 [cm.sup.-1] from wide (sum of characteristics peaks of HA and dibasic calcium phosphate) to sharp peak of pure HA.
As the pH of most nutritional parenteral solutions is between 4 and 8, understanding the pH-dependent behavior of the two forms of calcium phosphate, monobasic calcium phosphate Ca[([H.sub.2]P[O.sub.4]).sub.2] and dibasic calcium phosphate CaHP[O.sub.4], is critical to evaluating and predicting the probability of precipitation of calcium phosphate crystals [23-25].