Preparation of Polyamidoamine Dendrimer Modified Magnetic Nanoparticles and Its Application for Reliable Measurement of Sudan Red Contaminants in Natural Waters at Parts-Per-Billion Levels

Yalin Wu; Huahua Bai; Qingxiang Zhou; Shuangying Li; Yayang Tong; Jinghan Guo; Boyao Zhou; Zhi Li; Yali Zhan; Menghua Liu; Yanhui Li; Tongxu Qu

doi:10.3389/fchem.2021.708995

Preparation of Polyamidoamine Dendrimer Modified Magnetic Nanoparticles and Its Application for Reliable Measurement of Sudan Red Contaminants in Natural Waters at Parts-Per-Billion Levels

Front Chem. 2021 Aug 5:9:708995. doi: 10.3389/fchem.2021.708995. eCollection 2021.

Authors

Yalin Wu^{1

2}, Huahua Bai², Qingxiang Zhou¹, Shuangying Li¹, Yayang Tong¹, Jinghan Guo¹, Boyao Zhou¹, Zhi Li¹, Yali Zhan¹, Menghua Liu¹, Yanhui Li¹, Tongxu Qu¹

Affiliations

¹ State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing, China.
² Beijing Municipal Research Institute of Environmental Protection, Beijing, China.

Abstract

The health threat from Sudan red dyes has been the subject of much attention in recent years and is crucial to design and establish reliable measurement technologies. In the present study, a new magnetic nanomaterial, polyamidoamine dendrimer-modified magnetic nanoparticles (Gn-MNPs), was synthesized and characterized. The nanomaterials had good adsorption capacity for Sudan dyes from natural waters. G1.5-MNPs possessed excellent adsorption capacity and a linear adsorption relationship over the range from 0.02 to 300 μg L^-1 of Sudan dyes with relative coefficients all larger than 0.996. The sensitivity of the proposed method was excellent with detection limits over the range from 1.8 to 5.5 ng L^-1 and the precision was less than 3.0%. G1.5-MNPs showed a remarkable application potential for the enrichment of trace environment pollutants in aqueous samples and the developed method based on this nanomaterial could be a robust and reliable alternative tool for routine monitoring of such pollutants.

Keywords: PAMAM dendrimer; PAMAM dendrimer-modified magnetic nanoparticles; Sudan red dyes; high performance liquid phase chromatography; magnetic solid phase extraction (MPSE).