State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing, 102249, China.
State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing, 102249, China.
Talanta. 2021 Mar 1;224:121884. doi: 10.1016/j.talanta.2020.121884. Epub 2020 Nov 11.
Polyamidoamine dendrimer decorated FeO magnetic nanoparticles was synthesized and grafted with 4-mercaptobenzoic acid (4-MBA). The resulting material was utilized to develop an effective magnetic solid phase extraction method in combination with high performance liquid chromatography for trace determination of polycyclic aromatic hydrocarbons including phenanthrene (PHE), anthracene (ANT), fluoranthene (FLT), pyrene (PYR) and benzo(a)pyrene (BaP). The MNPs@G3.0@4-MBA exhibited to be an efficient extracting medium due to the existence of terminal benzene ring groups, the internal pores, and strong hydrophobic interactions and π-π interactions. The experiments demonstrated that the proposed method possessed excellent linearity in the concentration range of 0.1-300 μg L with correlation coefficients (R) larger than 0.997, and the limits of detection (LODs, S/N = 3) according to the ratio of signal to noise equal to three of PHE, ANT, FLT, PYR and BaP were 0.014 μg L, 0.032 μg L, 0.055 μg L, 0.027 μg L and 0.039 μg L, respectively. The proposed method was applied to real water samples and the spiked recoveries were over the range of 92-99%. The results showed that the method earned good repeatability and high sensitivity, and the as-prepared materials were stable and reusable, which displayed that the proposed method would have a wonderful application prospect.
聚酰胺-胺树枝状大分子修饰的 FeO 磁性纳米粒子被合成，并接枝上 4-巯基苯甲酸（4-MBA）。所得材料被用于开发一种有效的磁性固相萃取方法，结合高效液相色谱法，用于痕量测定多环芳烃，包括菲（PHE）、蒽（ANT）、荧蒽（FLT）、芘（PYR）和苯并（a）芘（BaP）。MNPs@G3.0@4-MBA 由于存在末端苯环基团、内部孔和强疏水相互作用和π-π相互作用，表现出高效的萃取介质。实验表明，该方法在 0.1-300μg/L 的浓度范围内具有良好的线性关系，相关系数（R）大于 0.997，根据信噪比等于三的 PHE、ANT、FLT、PYR 和 BaP 的信号与噪声比，检测限（LODs，S/N=3）分别为 0.014μg/L、0.032μg/L、0.055μg/L、0.027μg/L 和 0.039μg/L。该方法被应用于实际水样，加标回收率在 92-99%之间。结果表明，该方法具有良好的重复性和高灵敏度，所制备的材料稳定且可重复使用，显示出该方法具有广阔的应用前景。
