A microfluidic hollow fiber membrane extractor for arsenic(V) detection

Kamilah Hylton, Somenath Mitra

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

Microfluidic membrane extraction using a conventional hollow fiber membrane is presented for continuous, on-line extraction of arsenic. Previously reported micro-scale devices used flat membranes. These modules were relatively complex, difficult to seal, and high pressure drops made them prone to leaks. The present design is simpler, has higher active surface area per unit volume, and allows faster flow rates leading to enhanced mass transfer. On-line membrane extraction of As(V) via chelation through a supported liquid membrane was followed by conventional colorimetric detection with a UV-vis spectrophotometer. Enrichment factors were close to 30, and the detection limit was 27 μg L-1. The extraction was linear and reproducible. The relative standard deviation of six repeat extractions was less than 3%.

Original languageEnglish (US)
Pages (from-to)45-49
Number of pages5
JournalAnalytica Chimica Acta
Volume607
Issue number1
DOIs
StatePublished - Jan 21 2008

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy

Keywords

  • Arsenic
  • Membrane extraction
  • Microfluidic

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