食品科学 ›› 2002, Vol. 23 ›› Issue (5): 111-113.

• 分析检测 • 上一篇    下一篇

滤膜溶解分光光度法测定粮食中微量锰

 杨秀利, 谭晓军, 王建军, 曹艳萍   

  1. 济南大学化工学院,榆林高专化学系
  • 出版日期:2002-05-15 发布日期:2012-02-13

Spectrophotometric Determination of Trace Manganese in Food by Dissolving the Filter Membranes

 YANG  Xiu-Li, TAN  Xiao-Jun, WANG  Jian-Jun, CAO  Yan-Ping   

  • Online:2002-05-15 Published:2012-02-13

摘要: 锰(Ⅱ)与二溴羟基苯基荧光酮(DBHPF)和溴化十六烷基三甲铵(CTMAB)形成的配合物,通过微孔滤膜富集,用二甲亚砜将滤膜及配合物溶解,在分光光度计上测定吸光度的一种快速富集测定微量锰的方法。配合物最大吸收波长为592nm,表观摩尔吸光系数ε592=4.70×105L•mol-1•cm-1,锰含量在0~12μg/5ml范围符合比尔定律,用于粮食中锰的测定,结果满意。

关键词: 二溴羟基苯基荧光酮, 微孔滤膜, 分光光度法,

Abstract: A new preconcentration and determination method of manganese was studied. The complex of Mn-DBHPF-CTMAB and the microfilter membrane were dissolved in DMSO. The manganese was determined. The maximum absorption was observed at 592 nm with molar absorptivity 4.70×105L•mol-1•cm-1.For manganese content within 0~12μg/5ml,Beer’s Law is conformed. This method has high sensitivity. Satisfactory results were obtained for the determination of trace manganese in food.

Key words: trihydroxy-9-(3, 5-dibromo-4-hydroxy)phenylf-luorone-3 , Microfilter membrane , Spectrophotometric method , Manganese