Magnetic polyamidoamine dendrimer grafted with 4-mercaptobenzoic acid as an adsorbent for preconcentration and sensitive determination of polycyclic aromatic hydrocarbons from environmental water samples

Yayan Tong; Qingxiang Zhou; Yi Sun; Xueying Sheng; Boyao Zhou; Jingyi Zhao; Jinghan Guo

doi:10.1016/j.talanta.2020.121884

Magnetic polyamidoamine dendrimer grafted with 4-mercaptobenzoic acid as an adsorbent for preconcentration and sensitive determination of polycyclic aromatic hydrocarbons from environmental water samples

Talanta. 2021 Mar 1:224:121884. doi: 10.1016/j.talanta.2020.121884. Epub 2020 Nov 11.

Authors

Yayan Tong¹, Qingxiang Zhou², Yi Sun¹, Xueying Sheng¹, Boyao Zhou¹, Jingyi Zhao¹, Jinghan Guo¹

Affiliations

¹ State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing, 102249, China.
² State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing, 102249, China. Electronic address: zhouqx@cup.edu.cn.

PMID: 33379093
DOI: 10.1016/j.talanta.2020.121884

Abstract

Polyamidoamine dendrimer decorated Fe₃O₄ 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^-1 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^-1, 0.032 μg L^-1, 0.055 μg L^-1, 0.027 μg L^-1 and 0.039 μg L^-1, 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.

Keywords: 4-Mercaptobenzoic acid; High performance liquid-phase chromatography; MNPs@G3.0@4-MBA; Magnetic solid-phase extraction; Polycyclic aromatic hydrocarbons.