动力学分光光度法测人参中的痕量铁  

Determination of Trace lron in Ginseng Ant and Water By Kinetic Spectrophotometry

作　　者：管桂芝[1] 王立斌[1] 

机构地区：[1]吉林省通化师范学院,通化134002

出　　处：《人参研究》2004年第4期8-10,共3页Ginseng Research

摘　　要：利用痕量铁在 pH =4.0的HAc-NaAc介质中能催化H2 0 2 ,氧化苯酚红的反应。在催化条件下 ,表观活化能增加 5 5 %的原理 ,建立了动力学分光光度法测定痕量铁的新方法。此法检出限为了 7.2× 1 0 - 4 μg/ml,线性范围为 0 .1～ 0 .8μg/ml,此法用于测定痕量铁 ,灵敏度高 ,重现性好。A new method for determination of trace iron in ginseng ant and water by kinetic spectrophotometry was established .It was based on the fact that iron can catalyze the reaction of reagent-red linearly by oxidizing with H 20 2 under the condition of (Ph=4.0) HAc-NaAc buffer solution medium..With the catalyst in the presence ,the activation energy of the reaction increased by 55%.The linear range of this method is 0.1-0.8 ug/mi and the detection limit is 7.2× 10 -4μg/ml.The method has the advantage of high sensitivity and good recurrence.

关 键 词：痕量铁 人参 HA 酚红 反应 增加 新方法 催化条件 重现性 苯酚 

分 类 号：R284[医药卫生—中药学]