无机偶合流动注射化学发光测定钒的研究  

Study on the Determination of Vanadium(Ⅳ) by Flow Injection Chemiluminescence Based on Coupled Reaction

作　　者：李卫华[1] 王占玲[1] 李建中[1] 章竹君[1] 

机构地区：[1]陕西师范大学化学系

出　　处：《分析试验室》1998年第1期41-44,共4页Chinese Journal of Analysis Laboratory

摘　　要：基于钒（Ⅳ）对铬（Ⅵ）氧化Ｉ－产生Ｉ２的诱导作用，和Ｉ２氧化鲁米诺产生化学发光的反应，建立了无机偶合反应流动注射化学发光测定痕量钒的新方法。本方法线性范围１×１０－６～１×１０－２ｇ／Ｌ，ＲＳＤ＝２．８％（ｎ＝１１次，ｃ＝８×１０－６ｇ／Ｌ），检出限为７×１０－７ｇ／Ｌ。本法用于水样、人发中钒的测定，结果令人满意。A new method for determining vanadium(Ⅳ) by flow injection chemiluminescence was developed.It is based on the oxidation of I - by K 2Cr 2O 7 induced by vanadium(Ⅳ),and the subsquent chemiluminescence reaction of luminol oxidized by I 2.The CL intensity is linear to vanadium(Ⅳ) concentration over the range of 1×10 -5 mol/L～1×10 -9 mol/L.The detection limit is 7×10 -10 g/mL,the relative standard deviation is 2.8% for 11 measurements of 8×10 -9 g/mL vanadium(Ⅳ) standard solution.The method has been used to determine vanadium in hair and water samples with satisfactory results.

关 键 词：化学发光 流动注射 钒 

分 类 号：O614.511[理学—无机化学]