摘要
通过ECS60树脂与重金属离子的螯合反应提取水溶液中的镉离子,用中心波长为447 nm的激光照射含有Cd^(2+)的螯合物产生荧光,对低重金属含量的水溶液进行检测。结果发现,激光诱导荧光探测重金属离子的灵敏度得到了极大提高。此外,研究了螯合时间和溶液pH值对螯合物荧光强度的影响,确定最优的溶液pH值为6.0,形成螯合物的时间为40 min。所提方法可用于水溶液中低含量Cd^(2+)的有效检测。
Low cadmium ion contents in aqueous solutions were determined based on laser-induced fluorescence spectroscopy. Cd^(2+)ions in aqueous solution were extracted with chelating resin ECS60, and the fluorescence emission of the cadmium chelates excited by a laser at a central wavelength of 447 nm was analyzed. The results showed that the sensitivity of laser-induced fluorescence spectroscopy was significantly increased for the detection of cadmium in water. The effect of reaction time of the resin chelating the ions and the acidities of the aqueous solutions on the fluorescence emission intensities of the chelates was studied, indicating that it took 40 min for the resin to form stable Cd^(2+) chelates at the optimal acidity of pH 6.0. In this case, the strongest fluorescence emission of the chelates was obtained when excited. The laser-induced fluorescence spectroscopy could be applied for effective detection of Cd^(2+) ions in aqueous solutions.
作者
程霏霏
夏金安
乔克成
程泽坤
Cheng Feifei;Xia Jin'an;Qiao Kecheng;Cheng Zekun(School of Mathematics,Physics and Statistics,ShanghaiUniversityof Engineering Science,,Shanghai 201620,China)
出处
《应用激光》
CSCD
北大核心
2022年第10期156-161,共6页
Applied Laser
基金
上海高校实验技术队伍建设计划项目(0244-A4-0100-20-SDJH0405)
上海工程技术大学大学生创新训练项目(CX 1921006)。
关键词
激光诱导荧光
镉离子检测
螯合树脂
laser-induced fluorescence
detection of cadmium ion
chelating resin
