食品科学 ›› 2003, Vol. 24 ›› Issue (2): 115-118.

• 分析检测 • 上一篇    下一篇

食品防腐剂丙酸钙中微量元素铬的测定

 张小燕, 张勤, 杨德玉, 朱粉霞, 范晓东   

  1. 西北大学化学系,西北工业大学化学工程系
  • 出版日期:2003-02-15 发布日期:2011-12-13

Trace Cr Determination in Food Preservation

 ZHANG  Xiao-Yan, ZHANG  Qin, YANG  De-Yu, ZHU  Fen-Xia, FAN  Xiao-Dong   

  • Online:2003-02-15 Published:2011-12-13

摘要: 测定用鸡蛋壳制作的食品防腐剂———丙酸钙中痕量铬并对其可信度进行证明。采用化学发光法和石墨炉原子吸收法进行测定并比较其结果。两种方法均可达到快速、简便、干扰小、重现性好,均可达到生产中检测的要求。化学发光法的最低检出限为1.5×10-12g/ml,Cr3+在1×10-10~1×10-6g/ml浓度范围内与发光强度呈较好的线性关系。采用石墨炉原子吸收体系检测,最低检出限为1×10-12g/ml,标准曲线范围为0~1×10-6g/ml。

关键词: 食品防腐剂, 丙酸钙, 铬, 化学发光, 石墨炉原子吸收

Abstract: To determine trace chromium in food preservative calcium propionate made of eggshell to prove it’s reliability,we adopted chemiluminescence method and graphite furnace atomic absorption spectrometric (GFAAS)method to compare the obtained results. It was showed that results of the two methods were rapid simple,little interference and fine reproducibility. By chemiluminescence method the detection limit was1.5×10-12g/ml and the linear range 1×10-10~1×10-6g/ml. By GFAAS the same results were 1×10-12g/ml and 0~1×10-6g/ml respectively.

Key words: food preservative, calcium propionate, chromium(Cr), chemiluminescence, graphite furnace atomic absorption spectrometric(GFAAS)