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Abstract
Some anionic species present at the natural pH of milk (6.72), namely hydrogen-orthophosphate, L(+)-ascorbate and hydrogencitrate were detected in samples of crude bovine-milk both by ion interaction reverse phase HPLC chromatography and by amperometry based on microelectrodes.
The RSD ranged between 2 and 5 % for the former technique and between 3 and 4 % for the latter. the accuracy was evaluated by comparing the data obtained with the two techniques and discrepancies between the methods never exceeded 9% .