Magnetic N-doped carbon nanotubes: A versatile and efficient material for the determination of polycyclic aromatic hydrocarbons in environmental water samples

• Type: Article in International Scientific Journal
• Date: 2015

Authors

Menezes, HC (Author) Other; de Barcelos, SMR (Author) Other; Macedo, DFD (Author) Other; Purceno, AD (Author) Other; B.F. Machado (Author) Other; Teixeira, APC (Author) Other; Lago, RM (Author) Other; Serp, P (Author) Other; Cardeal, ZL (Author) Other

Journal

Title: Analytica Chimica Acta

Vol. 873

Pages: 51-56

ISSN: 0003-2670

Publisher: Elsevier

Indexing

ISI Web of Knowledge

Scopus - 30 Citations

Other information

Authenticus ID: P-00M-G1R

DOI: 10.1016/j.aca.2015.02.063

Abstract (EN): This paper describes a new, efficient and versatile method for the sampling and preconcentration of PAH in environmental water matrices using special hybrid magnetic carbon nanotubes. These N-doped amphiphilic CNT can be easily dispersed in any aqueous matrix due to the N containing hydrophilic part and at the same time show high efficiency for the adsorption of different PAH contaminants due to the very hydrophobic surface. After adsorption, the CNT can be easily removed from the medium by a simple magnetic separation. GC/MS analyses showed that the CNT method is more efficient than the use of polydimethylsiloxane (PDMS) with much lower solvent consumption, technical simplicity and time, showing good linearity (range 0.18-80.00¿gL-1) and determination coefficient (R2>0.9810). The limit of detection ranged from 0.05 to 0.42¿gL-1 with limit of quantification from 0.18 to 1.40¿gL-1. Recovery (n=9) ranged from 80.50±10 to 105.40±12%. Intraday precision (RSD, n=9) ranged from 1.91 to 9.01%, whereas inter day precision (RSD, n=9) ranged from 7.02 to 17.94%. The method was applied to the analyses of PAH in four lake water samples collected in Belo Horizonte City, Brazil. © 2015 Elsevier B.V.

Language: English

Type (Professor's evaluation): Scientific