Carbon nanotube enhanced membrane distillation for online preconcentration of trace pharmaceuticals in polar solvents

Document Type

Article

Publication Date

6-21-2011

Abstract

Carbon nanotube enhanced membrane distillation (MD) is presented as a novel, online analytical preconcentration method for removing polar solvents thereby concentrating the analytes, making this technique an alternate to conventional thermal evaporation. In a carbon nanotube immobilized membrane (CNIM), the CNTs serve as sorbent sites and provide additional pathways for enhanced solvent vapor transport, thus enhancing preconcentration. Enrichment using CNIM doubled compared to membranes without CNTs, while the methanol flux and mass transfer coefficients increased by 61% and 519% respectively. The carbon nanotube enhanced MD process showed excellent precision (RSD of 3-5%), linearity, and the detection limits were in the range of 0.001 to 0.009 mg L-1 by HPLC analysis. © 2011 The Royal Society of Chemistry.

Identifier

79958019200 (Scopus)

Publication Title

Analyst

External Full Text Location

https://doi.org/10.1039/c1an15140a

e-ISSN

13645528

ISSN

00032654

First Page

2643

Last Page

2648

Issue

12

Volume

136

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