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本文采用层层自组装法合成了具有良好水溶性的功能化磁性荧光Fe3O4/Py(芘)/PAM(聚丙烯酰胺)纳米粒子.利用其磁性,能够对该粒子进行简单有效的分离纯化,并可以对待测粒子进行富集以提高其检测灵敏度.利用Cr(VI)对该复合粒子水溶液的荧光猝灭,建立了测定Cr(VI)的荧光分析法,讨论了反应机理.在最佳实验条件下,该方法的线性区间为0.1～14.0μgmL-1,检测限为0.02μgmL-1.常见的共存离子不干扰测定,该方法可用于环境废水中Cr(VI)的测定.
In this paper, the functionalized magnetic fluorescent Fe3O4 / Py (pyrene) / PAM (polyacrylamide) nanoparticles with good solubility in water were synthesized by the layer-by-layer self assembly method, and their magnetic properties were used for simple and effective separation and purification Can be enriched in the particles to be detected in order to improve its detection sensitivity.Using Cr (VI) fluorescence quenching of the composite particle aqueous solution, the determination of Cr (VI) fluorescence analysis was established to discuss the reaction mechanism.In the best experimental conditions , The linear range of this method is 0.1 ~ 14.0μgmL-1 and the detection limit is 0.02μgmL-1. The common ions do not interfere with the determination. This method can be used for the determination of Cr (VI) in environmental wastewater.