Inkjet-printed disposable metal complexing indicator-displacement assay for sulphide determination in water

Anal Chim Acta. 2015 May 4:872:55-62. doi: 10.1016/j.aca.2015.02.045. Epub 2015 Feb 19.

Abstract

A sulphide selective colorimetric metal complexing indicator-displacement assay has been developed using an immobilized copper(II) complex of the azo dye 1-(2-pyridylazo)-2-naphthol printed by inkjetting on a nylon support. The change in colour measured from the image of the disposable membrane acquired by a digital camera using the H coordinate of the HSV colour space as the analytical parameter is able to sense sulphide in aqueous solution at pH 7.4 with a dynamic range up to 145 μM, a detection limit of 0.10 μM and a precision between 2 and 11%.

Keywords: Digital camera; H coordinate; Inkjet printing; Metal complexing indicator-displacement assay; Sulphide determination; Water analysis.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Colorimetry / instrumentation
  • Colorimetry / methods*
  • Copper / chemistry
  • Indicators and Reagents / chemical synthesis
  • Indicators and Reagents / chemistry*
  • Ink*
  • Naphthols / chemistry
  • Nylons / chemistry
  • Organometallic Compounds / chemical synthesis
  • Organometallic Compounds / chemistry*
  • Photography / instrumentation
  • Printing*
  • Sulfides / analysis*
  • Water / chemistry*

Substances

  • Indicators and Reagents
  • Naphthols
  • Nylons
  • Organometallic Compounds
  • Sulfides
  • Water
  • 1-(2-pyridylazo)-2-naphthol
  • Copper