食品科学 ›› 2003, Vol. 24 ›› Issue (11): 108-110.

• 分析检测 • 上一篇    下一篇

肉中微量氨的水杨酸-次氯酸钠光度法测定

 桑宏庆, 钟涌海, 刘效记   

  1. 安徽技术师范学院,安徽阜阳插花中学
  • 出版日期:2003-11-15 发布日期:2011-12-13

Determination of Microamouts of Ammorua in Meat by Salicylic Acid and Sodium Hypochlorite Spectrophotometry

 SANG  Hong-Qing, ZHONG  Yong-Hai, LIU  Xiao-Ji   

  1. 1.Anhui Technical Teacher’s College;2.Anhui Fuyang Chahua Middle School
  • Online:2003-11-15 Published:2011-12-13

摘要: 本文提出了一种测定肉中粗氨的新方法,可用于肉品新鲜度的检验。在常温下,NH3在亚硝基铁氰化钠的催化下于碱性介质中与次氯酸钠和水杨酸作用,生成稳定的蓝色化合物,最大吸收波长为660nm,表观摩尔吸光系数ε660为1.84×104L/mol•cm,Sandell灵敏度为0.001μg/cm2,回归方程为:y=0.108x+0.0022线性范围为:0~0.5μg/ml,相关系数为0.9999,回收率在96%~103.3%之间。

关键词: 水杨酸-次氯酸钠, 粗氨, 光度法,

Abstract: A new method for the determination of the crude ammonia in meat was presented in this paper.The method was basedon the color reaction of ammonia-salicylic acid-sodium hypochlorite with the presence of sodium nitroprusside in basic medium.It showed that the apparent molar absorptivity was 1.84×104L/mol•cm with the wavelength at 660nm.Beer’s law was obeyedfor the nitrogen of ammonia in the range of 0~5μg/10ml. The correlation coefficient is 0.9999. The recoveries were between96%~103.3%.The method has been applied satisfactorily to the determination of the crude ammonia in meat samples.

Key words: salicylic acid, sodium hypochlorite, crude ammonia, spectrophotometry, meat