新型荧光增强法检测水样品中碘离子  

Novel“turn-on”fluorescent method for the detection of I^-in water

作　　者：陈昌伦 张青 吴狄[2,3] 

机构地区：[1]重庆市綦江区环境监测站,重庆401420 [2]四川文理学院化学与化学工程系,四川达州635000 [3]四川文理学院,"特色植物开发研究"四川省高校重点实验室,四川达州635000

出　　处：《化学研究与应用》2013年第9期1341-1344,共4页Chemical Research and Application

摘　　要：Hg2+可以猝灭核黄素的荧光,碘离子(I-)可以与Hg2+形成HgI2,基于此,发展了一种新型的荧光增强法检测水中I-的方法。Hg2+加入后,核黄素在525 nm处的荧光被猝灭;继续在体系中加入不同浓度的I-,体系中Hg2+被不断消耗,导致核黄素在525 nm处的荧光逐渐增强。该方法检测I-的线性范围在1-100μmol·L-1,检测限是0.4μmol·L-1;同时,该方法具有较快的响应时间(2 min);对其他卤素离子具有较好的选择性;用于水中I-检测时得到了较好的回收率。Hg2. could quench the fluorescence of riboflavin, and iodine ion（I^-） could react with I-to form HgI2 or HgI2. On the basis of these two phenomena,a novel＂turn-on＂ fluorescent method for the deceteetion of I- was developed in the present work. In this strategy, the fluorescence of riboflavin at the wavelength of 525 nm was quenched owing to the addition of Hg^2＋. While in the presence of different concentrations of I-, I- could react with Hg^2＋ and make the fluorescence of riboflavin andHg2 mixture turn-on increasingly. This＂turn-on＂fluoreseent method had linear relationship with I^- from 1 to 100μmol.L^-1 with the limit of deetect（LOD） of 0. 4μmol-L^-1. Furthermore, this fluorescent method had fast reponse time to I-（2 min）, good sleetivity of other haloid ions and good recoveries in the anlysis of I- in drinking water.

关 键 词：Hg2＋ 核黄素 碘离子（I-） 荧光增强法 

分 类 号：O657.3[理学—分析化学]