Simultaneous extraction and concentration in carbon nanotube immobilized hollow fiber membranes

Document Type

Article

Publication Date

7-1-2010

Abstract

Analytical enrichment during continuous hollow fiber membrane extraction involves the movement of analytes from the sample to the extractant. At the same time, a second preconcentration mechanism is provided by out-diffusion of the extracting solvent. These effectively combine extraction and concentration into one step. In this paper, we demonstrate for the first time that the presence of carbon nanotubes (CNTs) can enhance both these phenomenon leading to superior performance in terms of higher enrichment factors and extraction efficiency. The CNTs were immobilized in the pores of a polypropylene hollow fiber and led to nearly 250% enrichment enhancement over the unmodified parent membranes. The detections limits for polycyclic aromatic compounds were between 0.042 and 0.25 μg/L. © 2010 American Chemical Society.

Identifier

77954193217 (Scopus)

Publication Title

Analytical Chemistry

External Full Text Location

https://doi.org/10.1021/ac100426y

ISSN

00032700

First Page

5561

Last Page

5567

Issue

13

Volume

82

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