摘要
采用Ｊｏｎｅｓ柱在线还原铁（Ⅲ）为铁（Ⅱ），研究了铁（Ⅱ）与光泽精的化学发光反应，加 入ＣＴＭＡＢ和乳化剂ＯＰ能明显提高发光的信噪比，基于此建立了痕量铁的流动注射化学发光 分析法。此法线性范围为 １×１０－１１～ １×１０－５ｇ／ｍＬ，检出限为 ２×１０－１２ｇ／ｍＬ，相对标准偏差为 ２．０％（１×１０－８ｇ／ｍＬ，ｎ＝１１），已用于人发中铁的测定。深入探讨了反应机理。
A new flow-injection chemiluminescence method for the determination of iron is described. It is based upon the chemiluminescence reaction of iron (Ⅱ)-lucigenin system with Jones reductor. The chemiluminescence signal-to-noise ration can be improved apparently by the addition of cetyltrimethyl- ammonium bromide and emulsor OP. The present method has a wide linear of 1×10-11～1×10-5 g/mL for Fe(Ⅱ). The detection limit is 2 × 10-12 g/mL. The relative standard deviation is 2.0% (1× 10-8 g/mL Fe, n = 11). The method has been applied to the determination of iron in hair samples with satisfactory results. The mechanism of this reaction is also investigated in detail.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1998年第8期1007-1010,共4页
Chinese Journal of Analytical Chemistry
关键词
流动注射
胶束增敏
光泽精
化学发光法
测定
铁
Flow-injection, chemiluminescence analysis, micelle sensitization, lucigenin, iron
