摘要
在316 nm激发波长下,痕量铅离子的引入可使铕-甲基丙烯酸（MAA）-邻菲罗啉（Phen）三元稀土配合物壳聚糖（CHIT）醋酸（HAc）溶液体系在418 nm的发射荧光产生猝灭现象.在0.5 g/L Eu（MAA）3Phen-0.2％ CHIT-1％ HAc溶液中,随着Pb2＋浓度的增大,该体系的荧光强度IF由急剧下降至渐趋稳定.Pb2＋浓度在0.1～6 μmol/L内,IF呈线性下降,检出限为1.1 μg/L.
The emission fluorescence of Eu-MAA-Phen in CHIT of HAc solution at 418 nm with excitation wavelength of 316 nm could be quenched by trace lead ions. In solution of 0.5 g/L Eu（MAA）3Phen-0.2 % CHIT-1% HAc, the fluorescence intensity （1F） dropped rapidly at first and then tended to be stable with the increasing concentration of Pb2＋. 1F presented a linear decline when the concentration of Pb2＋ was in the range from 0.1 to 6 μmol/L. And the detection limit of Pb2＋ was 1.1 μg/L.
出处
《广东化工》
CAS
2014年第17期186-187,189,共3页
Guangdong Chemical Industry
关键词
荧光
铕
壳聚糖
甲基丙烯酸
邻菲罗啉
铅离子
Fluorescent： Europium
Chitosan： Methyacrylicacid
1,10-phenanthroline
Lead ions
