食品科学 ›› 2003, Vol. 24 ›› Issue (8): 121-123.

• 分析检测 • 上一篇    下一篇

红外光谱法测定奶粉中苯甲酸钠的含量

 回瑞华, 侯冬岩, 关崇新, 郭华   

  1. 鞍山师范学院化学系,沈阳师范大学化学系
  • 出版日期:2003-08-15 发布日期:2011-12-13

Determination of Sodium Benzoate in Milk Powders by Infrared Spectrophotometry

 HUI  Rui-Hua, HOU  Dong-Yan, GUAN  Chong-Xin, GUO  Hua   

  • Online:2003-08-15 Published:2011-12-13

摘要: 本文采用红外示差光谱定量分析奶粉中苯甲酸钠的含量。实验结果,回归方程为:A=0.01873 + 0.4295C ,相关系数r=0.9986,苯甲酸钠的浓度在0 ~2.5 (mg/g) 范围内 A与浓度C之间呈良好的线性关系,可按标准曲线法进行定量分析.本法的回收率为103.6% ,变异系数小于1.20。方法的准确度与精密度均令人满意,而且操作简便易行。

关键词: 红外示差光谱, 苯甲酸钠, 奶粉

Abstract: Determination of sodium benzoate in milk powders by the infrared difference spectrophotometry. The experimenresults demostrate regression equation of concentration-A was obtained:A = -0.001873 + 0.4295 C,relation coefficient r=0.9986, the sodium benzoate concentrations in 0~2.5 (mg/g ) with ΔA obeying linear relation. The recovery is 103.6% and thecoefficient of variation is 1.20. The method is precise, simple and satisfactory.

Key words: infrared difference spectrophotometry, sodium benzoate, milk powders