LaF_(3):Ce,Tb荧光猝灭法测定亚硝酸盐  

Determination of Nitrite based on Fluorescence Quenching of LaF_(3):Ce,Tb

作　　者：刘明辉 阎文洁 聂颖 崔雪梅 刘呈云 密丛丛 Liu Minghui;Yan Wenjie;Nie Ying;Cui Xuemei;Liu Chengyun;Mi Congcong(School of Chemistry&Chemical Engineering,Linyi University,Linyi 276000,China)

机构地区：[1]临沂大学化学化工学院,山东临沂276000

出　　处：《山东化工》2021年第17期134-135,138,共3页Shandong Chemical Industry

基　　金：临沂大学博士科研启动项目(LYDX2016BS017);山东省高等学校大学生创新创业训练计划项目(X202010452012);临沂大学教学质量工程项目(50618196)。

摘　　要：亚硝酸盐作为氮循环的中间产物,广泛存在于水、土壤和食品等物质中。过量的亚硝酸盐进入人体后,可对人体健康产生严重危害。利用亚硝酸钠对LaF 3:Ce,Tb纳米颗粒的荧光猝灭现象,本文建立了一种亚硝酸钠的快速、灵敏检测方法。结果显示,该方法的线性范围为10~125μg·mL-1,检测限为1.7μg·mL-1,线性相关系数为0.9993,可用于测定环境水样中的亚硝酸钠。Nitrite,as an intermediate product of nitrogen cycle,is widely found in water,soil and food.When excessive nitrite enters the human body,it can cause serious harm to human health.In this paper,a rapid and sensitive method for the determination of sodium nitrite was established based on fluorescence quenching of LaF 3:Ce,Tb nanoparticles by sodium nitrite.The result showed that the linear range of the method was 10~125μg·mL-1,the detection limit was 1.7μg·mL-1,and the linear correlation coefficient was 0.9993.The method could be used to determine sodium nitrite in environmental water sample.

关 键 词：稀土 荧光猝灭 亚硝酸盐 

分 类 号：O657.3[理学—分析化学]