论文部分内容阅读
在pH值为2.87的Britton-Robinson(BR)缓冲溶液中,全氟辛烷磺酸(PFOS)可通过静电相互作用与质子化的乙基紫(EV)结合生成离子缔合物,导致体系散射信号显著增强.增强的散射信号(ΔIRLS)与PFOS浓度在一定范围内具有线性关系,据此建立了PFOS的共振光散射(Resonance Light Scattering,RLS)分析方法,线性范围为0.02~10.0μmol/L,检测限为2.0nmol/L.表征了紫外/可见光谱、扫描电镜显微成像(SEM),优化了实验条件,并探讨了反应机理.该方法成功地用于三峡库区嘉陵江水样中PFOS的测定,相树标准误差小于等于4.5%.
In a Britton-Robinson (BR) buffer solution with a pH of 2.87, PFOS interacted with protonated ethyl violet (EV) by electrostatic interaction to form ion-association products, resulting in scattering of the system Signal was significantly enhanced.The enhanced scattering signal (ΔIRLS) had a linear relationship with the concentration of PFOS within a certain range.Analytical method of Resonance Light Scattering (RLS) was established for PFOS, and the linear range was 0.02 ~ 10.0μmol / L , The detection limit of which was 2.0 nmol / L. The UV / Visible spectra and scanning electron microscopy (SEM) were used to optimize the experimental conditions and the reaction mechanism was discussed.The method was successfully applied to the determination of PFOS The standard error of phase tree is less than or equal to 4.5%.