摘要
实验发现在硫酸介质中钍-桑色素(morin)-TOPO(或TRPO)-十二烷基磺酸钠(SLS)络合物能产生强烈荧光;研究了该络合物的动力学性质,建立了灵敏度高,选择性好的时间分辨荧光法。方法检出限为2.5ng/L, 对50ng Th,RSD为3.6％,线性范围为0～80ng。分析速度为20～30样/h。方法经环境水中钍分析,结果满意。
An on-line preconcentration time resolved fluorimetric method was developed for the determination of trace thorium in water, based on luminescence of complex Th-morin--TOPO(or TRPO)-sodium lauryl sulfate in sulfuric acid medium. Interferences from companied cations, such as Al^(3+) and Zr^(4+), which emit fluorescence with much slower rising rate at the same condition were effectively eliminated through optimization of the manifold parameters and precisely controlling of the elution flow rate. Effects of nearly 40 ions were also investigated. The detection limit, the liner range and relative standard deviation for 50 ng Th are 2. 5ng/L, 0～80 ng and 3. 6%, respectively. Sampling rate is 30 per hour.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1991年第9期1075-1077,共3页
Chinese Journal of Analytical Chemistry
关键词
水
钍
测定
时间分辨
荧光法
Trace throium
Time resolution
Micell sensitized fluorimetry
On-line preconcentration
