Abstract:  A method for determination of sodium pyrophosphate as an additive in dehydrated potato granules was described.pyrophosphate in potato granules was extracted with sodium sulfate and sulfuric acid solution,followed by hydrolysis with sulfuric acid in boiling water bath to liberate inorganic phosphate,which was measured photometrically.The interfering factor for determination was eliminated or decreased with dehydrated potato granules without the additive as a modified sample.Recovery of sodium pyrophosphate for 5 samples was in the range of 99.0％to 101.0％.Variation coefficient was 0.64.The method was accurate,reliable and simple.

Key words: Dehydrated potato granules Additive Sodium pyrophosphate Detremination.