摘要
针对传统重金属测定方法精度低和其他重金属的干扰,提出一种荧光纳米传感器材料的检测方法,,并对其性能进行了测试。结果表明,当待测体系内存在铜离子时,荧光纳米材料中的荧光开始淬灭。当体系内铜离子浓度提升至70μmol/L时,荧光纳米材料内的硅纳米粒子荧光发射峰几乎完全淬灭;在0~1μmol/L时,荧光强度与铜离子的线性关系良好,相关系数(R 2)大于0.99,最低检出限为0.01μmol/L,且传感器检测性能不受其他重金属离子影响;在pH值为4~8时,经过紫外光光照连续照射60 min,且在室温条件下放置30 d后,荧光纳米材料的荧光强度几乎不发生变化,加标回收率约为95%~105%,相对标准偏差(RSD)为1.4%~3.6%,表现出良好的综合性能。
In view of the low accuracy of traditional heavy metal determination methods and the interference of other heavy metals,a detection method of fluorescent nanosensor materials was proposed,and its performance was tested.The experimental results showed that,when there were copper ions in the system to be tested,the fluorescence of the fluorescent nano sensor solution began to quench,and when the concentration of copper ions in the system increased to 70μmol/L,the fluorescence emission peak of silicon nanoparticles in the fluorescent nanosensor solution was almost completely quenched.At 0~1μmol/L,the fluorescence intensity had a good linear relationship with copper ion,the correlation coefficient(R 2)was greater than 0.99,and the minimum detection limit was 0.01μmol/L.The detection performance of the sensor was not affected by other heavy metal ions.When the pH range was 4~8,the fluorescence intensity of the fluorescent nano sensor solution almost did not change after being continuously exposed to ultraviolet light for 60 minutes and placed at room temperature for 30 days.The recovery rate of spike was about 95%~105%,and the relative standard deviation RSD was 1.4%~3.6%,showing good comprehensive performance.
作者
赵雪磊
赵晋
ZHAO Xuelei;ZHAO Jin(Shangluo Vocational and Technical College,Shangluo 726000,Shaanxi China)
出处
《粘接》
CAS
2023年第12期76-79,共4页
Adhesion
基金
陕西省教育厅2022年一般专项科研计划项目(22JK0367)。
关键词
荧光纳米材料
重金属检测
抗干扰性
荧光强度
fluorescent nano sensor
heavy metal detection
immunity to interference
fluorescence intensity
