Journal
ANALYTICA CHIMICA ACTA
Volume 872, Issue -, Pages 55-62Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2015.02.045
Keywords
Sulphide determination; Water analysis; Metal complexing indicator-displacement assay; H coordinate; Digital camera; Inkjet printing
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Funding
- Ministerio de Economia y Competitividad (Spain) [CTQ2009-14428-C02-01, CTQ2013-44545-R]
- Junta de Andalucia (Proyecto de Excelencia) [P10-FQM-5974]
- Reincorporacion de Doctores UGR programme
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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 mu M, a detection limit of 0.10 mu m and a precision between 2 and 11%. (C) 2015 Elsevier B.V. All rights reserved.
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