【摘要】 本工作是在自建装置上，利用时间分辨激光荧光光谱技术，选择Ｅｕ－ＴＴＡ－ＥｔＯＨ液体荧光体系，建立了时间分辨激光荧光测定铕的方法。该法测定铕离子的线性范围为０．０００２～１０μｇ／ｍｌ，检测限为１０－５μｇ／ｍｌ。０．０３μｇ／ｍｌＥｕ３＋标准样品ＥｕＴＴＡ３，测定的相对标准偏差为４．７％（ｎ＝１２），该法用于实际样品的分析测定，结果满意。结合铕的分析，对本方法选择化学体系的条件、测定装置的参数进行了讨论。并获得了一些基本实验数据。更多还原

【Abstract】 A variable gated photomultiplier technique capable of separating weak prompt fluorescence from the total emission of complexes is described. This technique includes the use of a N2 laser excitation source and a Boxcar integrator for sampling and time averaging the emission signals. The Boxcar enables one to pick the segments of emission at variable time delays. The EuTTA3 in EtcH emits more strong fluorescences under irradiation of N2 laser.The optimal condition for determination of Eu3+ on the set-up was studied. The linear range and detection limit of the method were 2×10-4 -10μg/ml and 1× 10-5μg/ml, respectively. The relative standard deviation for the determination of EuTTA3 (Eu3+: 0. 03μg/ml, n =12) was 4. 7%. The method is simple and highly sensitive and can be used to determine real samples.更多还原