作　　者： ; ;

机构地区： 甘肃农业大学

出　　处： 《甘肃农业大学学报》 1996年第3期242-245,272,共5页

摘　　要： Ｔｂ３＋与苯—１，４—二甲酸形成的络合物，在ｐＨ＝５．５时直接测定Ｔｂ３＋的含量，波长为λｅｘ／λｅｍ＝２６０／５４５ｎｍ，检出限为１．５５×１０－７ｍｏｌ／Ｌ，线性范围１．５５×１０－７～４．０×１０－５ｍｏｌ／Ｌ，线性相关系数及标准误差分别为０．９９９３和１．７％。回收率为９８．６％～１００．７％。 The fluorescence properties and emitting mechanism of the chalete of Tb 3+ with benzene 1,4 dicarboxylic acid were investigated.The optimal conditions for determining Tb 3+ and the interference of other rare earth ions as well as some common metal ions were studied.As the wave length of λ ex /λ em was 260/545 nm at pH 5 5,Tb 3+ concentration was determined with a lowest detection limit of 1 55×10 -7 mol/L,a linear range of 1 55×10 -7 ～4 0 ×10 -5 mol/L,a linear correlation coefficient (R) of 0 9993 and a relative standard deviation of 1 7 %. The recovery was achieved between 98 6% and 100 7%.

关 键 词： 铽 测定 荧光光度法 苯二甲酸

领　　域： [理学] [理学] [理学] [理学]