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An automated microfluidic colourimetric sensor applied in situ to determine nitrite concentration

Research output: Contribution to journalArticle

  • Alex D Beaton
  • VJ Sieben
  • CFA Floquet
  • EM Waugh
  • SEK Bey
  • IRG Ogilvie
  • MC Mowlem
  • H Morgan
Original languageEnglish
Pages (from-to)1009 - 1014
Number of pages6
JournalSensors and Actuators B: Chemical
DatePublished - Aug 2011


A stand-alone sensor system with integrated sub-systems is demonstrated. The system is portable and capable of in situ reagent-based nutrient analysis. The system is based on a low cost optical detection method, together with an automated microfluidic delivery system that is able to detect nitrite with a limit of detection (LOD) of 15 nM. The sensor was operated in situ at Southampton Dockhead for 57 h (December 2010) and 375 measurements were taken.


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