Computer controlled-flow injection potentiometric system based on virtual instrumentation for the monitoring of metal-biosorption processes

A. Florido, C. Valderrama, S. Nualart, L. Velazco-Molina, Arias A. de Fuentes, M. del Valle

Research output: Contribution to journalArticleResearchpeer-review

9 Citations (Scopus)

Abstract

A completely automated flow-injection system was developed for the monitoring of biosorption studies of Cu(II) ion on vegetable waste by-products. The system employed flow-through Cu(II)-selective electrodes, of epoxy-resin-CuS/Ag2S heterogeneous crystalline type, and computer controlled pumps and valves for the flow operation. Computer automation was done through a specially devised virtual instrument, which commanded and periodically calibrated the system, allowing for the monitoring of Cu(II) ions between 0.6 and 6530mgL-1 at a typical frequency of 15h-1. Grape stalk wastes were used as biosorbent to remove Cu(II) ions in a fixed-bed column with a sorption capacity of 5.46mgg-1, obtained by the developed flow system, while the reference determination performed by FAAS technique supplied a comparable value of 5.41mgg-1. © 2010 Elsevier B.V.
Original languageEnglish
Pages (from-to)26-34
JournalAnalytica Chimica Acta
Volume668
Issue number1
DOIs
Publication statusPublished - 1 May 2010

Keywords

  • Copper sorption
  • Flow-injection potentiometry
  • Grape stalk wastes
  • Ion-selective electrode
  • On-line monitoring
  • Virtual instrument

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