摘要
基于Pb^(2+)对Y_2O_3:Eu纳米颗粒的荧光猝灭作用,建立了运用琼脂溶液来固定Y_2O_3:Eu纳米颗粒并用于测定水中微量Pb^(2+)的荧光分析新方法.在pH=3.0的条件下,测定的荧光最大激发波长和发射波长分别为220nm和614nm,测定Pb^(2+)浓度的线性范围为4.0×10^(-6)～7.8×10^(-4)mol/L,回收率为97.0%～102.6%.该方法用于环境水中Pb^(2+)的测定,结果满意.
A new and sensitive method for determining of trace Pb^2＋ was developed by using Y2O3 ： Eu nanoparticles dispersed in an agar solution. The maximum excitation and emission wavelengths of Y2O3 ：Eu nanoparticles were 220 nm and 614 nm, respectively. The method showed good linearity in the range from 4.0×10^-6～7.8×10^-4mol/L Pb^2＋ with recovery of 97.0% -102.6%. The performance of this method was verified in determining Pb^2＋ content showing a good potential in application.
出处
《上海师范大学学报（自然科学版）》
2007年第4期83-87,共5页
Journal of Shanghai Normal University(Natural Sciences)
基金
上海市教委项目(05DZ01
05JG05054
06ZZ16)
化学生物传感与计量学国家重点实验室课题(2005001).
关键词
荧光法
荧光猝灭
琼脂
铅
spectrophotofluorimetry
fluorescence quenching
agar
lead
