水杨基荧光酮-HP-β-CD-荧光猝灭法测定Fe(Ⅲ)  

Determination of Fe(Ⅲ) with Salicyl Fluorone-HP-β-CD-Fluorescence Quenching Method

作　　者：李学晶 Li Xue-jing

机构地区：[1]大庆油田化工有限公司东昊分公司表面活性剂厂,黑龙江大庆163000

出　　处：《化工设计通讯》2018年第8期49-49,共1页Chemical Engineering Design Communications

摘　　要：在pH 5.20的NaAc-HAc缓冲溶液中,在羟丙基-β-环糊精和Triton X-100的存在下,水扬基荧光酮(SAF)本身呈较强的荧光(λex=365nm,λem=537nm)微克铁(Ⅲ)在此条件下,能与SAF生成配合物而使SAF-HP-β-CD-Triton X-100体系产生荧光熄灭现象。荧光减弱(△F)与铁(Ⅲ)浓度在0~3.0μg/25mL范围内呈良好的线性关系,该反应对铁(Ⅲ)的检出限为1.23μg/L,已经应用于自来水中微量铁的测定。且相对标准偏差均小于0.6%,加标回收率均在98.0%~101.4%。结果表明:羟丙基-β-环糊精对所研究的荧光体系均有增敏增稳作用。In the presence of hydroxypropyl-β-cyclodextrin and TritonX-100 at pH 5.20 in NaAc-HAc buffer solution,SAH itself shows strong fluorescence(λex=365nm,λem=537nm)micrograms of iron(III)under this condition can generate complexes with SAF to produce fluorescence quenching in the SAF-HP-β-CD-TritonX-100 system.There was a good linear relationship between fluorescence reduction(△F)and iron(III)concentration in the range of 0-3.0μg/25mL.The detection limit of this reaction for iron(III)was 1.23μg/l.It has been applied to trace amounts in tap water.Determination of iron.The relative standard deviations were less than 0.6%,and the recoveries were between 98.0%and 101.4%.The results showed that hydroxypropyl-β-cyclodextrin had a sensitizing effect on the fluorescence system studied.

关 键 词：荧光光度法 铁(Ⅲ) 水扬基荧光酮 羟丙基-Β-环糊精 

分 类 号：O657.3[理学—分析化学]