Preparation of micelle supported magnetic hydroxylated multi-walled carbon nanotubes-based dispersive solid-phase extraction for the determination of PAHs in seawater
by Shaojun Zhang; Mingyu Wang; Jiagan Li; Chengda Zhang; Shouwen Pang
International Journal of Nano and Biomaterials (IJNBM), Vol. 8, No. 3/4, 2019

Abstract: Measuring the impact of PAHs in seawater samples is often difficult due to the low concentrations in which they appear and the complexity of the sample matrix. In this work, a micelle supported Fe₃O₄ magnetic nanoparticles decorated hydroxylated multi-walled carbon nanotubes material was synthesised. The material was facilely synthesised between Fe²⁺ and carbon nanotubes. The synthesised nanomaterial served as an excellent support for micelles, exhibiting high loading capacity and selectivity. The prepared material used in dispersive solid-phase extraction (DSPE) for investigation of polycyclic aromatic hydrocarbons (PAHs) from seawater for the first time. The application showed good response (R² > 0.9981) in the range of 0.02-1.0 μg/L with high precision. Limits of detection of 16 PAHs ranged from 0.009 to 0.018 μg/L (S/N = 3). The spiked recovery of proposed method (72.65%-96.54%) was 1.01-2.32 times higher than that of the conventional method, and the corresponding relative standard deviation (RSD) was in the range of 4.23%-9.96%. The enrichment factors reached to 39.65-121.32 that exhibited good enrichment ability.

Online publication date: Fri, 07-Feb-2020

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