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

Ken Gethard, Somenath Mitra

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)2643-2648
Number of pages6
JournalAnalyst
Volume136
Issue number12
DOIs
StatePublished - Jun 21 2011

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy
  • Electrochemistry

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