食品科学 ›› 2001, Vol. 22 ›› Issue (5): 58-60.

• 基础研究 • 上一篇    下一篇

土豆颗粒全粉中的添加剂-焦磷酸钠的测定方法研究

吕耀昌   

  1. 中国农业科学院作物品种资源研究所
  • 出版日期:2001-05-15 发布日期:2012-02-16

Study on Determining Method for Sodium Pyrophosphate as an Additive in Dehydrated Potato Granules

 吕Yao-Chang   

  • Online:2001-05-15 Published:2012-02-16

摘要: 描述了土豆颗粒全粉添加剂-焦磷酸钠的测定方法。该法将焦磷酸钠用硫酸-硫酸钠溶液提取和水解成磷酸并以光度法测定。采用不加焦磷酸钠的土豆颗粒全粉作修正样品以减少和消除测定中的干扰因素。对五种土豆颗粒全粉的加入回收率为99.0%~101.0%,变异系数为0.64。该方法是一种准确、可靠和简便的方法。

关键词: 土豆颗粒全粉, 添加剂, 焦磷酸钠, 测定

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.

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