阻抑动力学同步荧光法测定环境水样中苯胺

在稀硫酸介质和CTMAB存在下 ,痕量苯胺对溴酸钾氧化荧光素的反应具有灵敏的阻抑作用 ,荧光素的氧化产物有强荧光 ,但其激发光谱和发射光谱严重重叠 ,文章采用同步荧光光谱法减小了谱带重叠 ,获得了很好的灵敏度和选择性 ,据此建立了阻抑动力学同步荧光法测定苯胺的新方法。方法的线性范围是 0～10 μg·L- 1 ,检测限为 0 3μg·L- 1 。用于环境水样和实验室废水中苯胺含量的测定 ,结果满意

Inhibitory Kinetic-Synchronous Fluorimetric Determination of Trace Aniline

A novel kinetic-synchronous fluorimetric method is reported for the determination of trace aniline. The method is based on the inhibitory effect of aniline on the oxidation of fluorescein by potassium bromate in the presence of surfactant -CTMAB in the acid medium. Fluorescein's oxidized product produces strong fluorescence. But its excitation and emission spectra overlap seriously. So this article adopted synchronous fluorimetric spectra to diminish spectra overlap and obtained very good sensitivity and selectivity. The detection limit for aniline is 0.3 microg x L(-1), and the linear range is 0-10 microg x L(-1). The proposed method has been applied to the determination of trace aniline in waste water and laboratory water with satisfactory results.