Ag^(+)存在下催化还原铬黑T及应用于Ag^(+)检测  

Catalytic reduction of chromium black T in the presence of Ag^(+) and its application in Ag^(+)detection

作　　者：郭永艳[1,2] 党铭铭[1] 田雁飞 杨萍[1] 龙云飞[2] GUO Yong-yan;DANG Ming-ming;TIAN Yan-fei;YANG Ping;LONG Yun-fei(Department of Resources and Environment,Hunan Nonferrous Metals Vocational and Technical College,Zhuzhou 412006,China;School of Chemistry and Chemical Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南有色金属职业技术学院资源环境系,湖南株洲412006 [2]湖南科技大学化学化工学院,湖南湘潭411201

出　　处：《化学研究与应用》2021年第4期761-766,共6页Chemical Research and Application

基　　金：国家自然科学基金项目(21275047)资助;湖南省自然科学基金项目(2016JJ5005)资助。

摘　　要：以铬黑T(EBT)为探针,在有Ag^(+)存在的最优条件下,EBT被NaBH 4催化还原,体系在445 nm发射波长处荧光强度明显增强,基于此构建一种光学测定溶液中微量Ag^(+)的方法。在最优条件下,Ag^(+)浓度在(7.5×10-9~1.0×10^(-6) mol·L^(-1))范围内呈良好的线性关系,线性回归方程为ΔI F=5.59×10^(8) c-31(c,mol·L^(-1),r=0.9966),Ag^(+)的最低有效检测浓度为6.0×10^(-8) mol·L^(-1)。在最优条件下,运用该方法对样品中Ag^(+)浓度进行检测,样品中Ag^(+)浓度的检测回收率在98.8%~102.4%之间,RSD=2.1%。该检测方法能够对水溶液中微量的Ag^(+)进行有效定量检测,且操作简单、检测限低、灵敏度高。Chrome black T(EBT)was used as a probe.Under the optimal conditions with Ag^(+),EBT was catalyzed by NaBH 4 and the fluorescence intensity of the system was significantly enhanced at the emission wavelength of 445nm.Based on this,an optical method for the determination of trace Ag^(+)in solution was constructed.Under the optimal conditions,the concentration of Ag^(+)in(7.5 x 10-9~1.0 x 10^(-6) mol·L^(-1))had good linear relationship within the scope,the linear regression equation forΔI F=5.59 x 10^(8) c-31(c,mol·L^(-1),r=0.9966),the minimum effective detection concentration of Ag^(+)was 6.0×10^(-8) mol·L^(-1).Under the optimal conditions,the method was used to detect the concentration of Ag^(+)in samples.The recovery rate of the concentration of Ag^(+)in samples ranged from 98.8%~102.4%,RSD=2.1%.This method can effectively detect trace Ag^(+)in aqueous solution with simple operation,low detection limit and high sensitivity.

关 键 词：铬黑T Ag^(+) 荧光分光光度法 

分 类 号：O657.3[理学—分析化学]