摘要
本文利用Ｓｍ－ＴＴＡ－ＥｔＯＨ液体荧光体系，采用时间分辨激光荧光检测手段，建立了钐的时间分辨激光荧光分析法。该法的线性范围为０．０１～１０μｇ／ｍｌ，检出限为３．３ｎｇ／ｍｌ。０．５μｇ／ｍｌ钐标样测定的相对标准偏差为３．７％（ｎ＝１２）。结合混合稀土中多种元素共存的特点，实验确定了装置的有关参数。用标准加入方法对实际样品进行了测定，并与其他方法测定结果进行了比较，结果满意。本法测定实际样品中钐的相对标准偏差小于７％。
In this paper,a simple and highly sensitive laser fluorimetric system is described,and the value of time discrimination for suppressing unwanted signals and decreasing the minimum detectable concentration is demonstrated. It is confirmed that time discrimination is very useful for ultratrale determination of fluorescent complex.This technique is successful with the combined use of a pulsed laser and a pulse gate signal detection system for samarium complex. The linear range and the detectin limit of the method are 0 01—10μg/ml and 3 3ng/ml,respectively.The RSD for Sm 3+ (0 5μg/ml)(n=12) is 3 7%.The method was used to detemine samarium in rare earth mixtures.The recovery was in the range of 90 0—110 0%,and the mean recovery was 101 4%(n=6)。
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
1997年第1期113-117,共5页
Spectroscopy and Spectral Analysis
关键词
钐
时间分辨
激光荧光光谱
Time resolved spectra, Laser fluorescence, Samarium analysis
