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  • Title: Inkjet-printed disposable metal complexing indicator-displacement assay for sulphide determination in water.
    Author: Ariza-Avidad M, Agudo-Acemel M, Salinas-Castillo A, Capitán-Vallvey LF.
    Journal: Anal Chim Acta; 2015 May 04; 872():55-62. PubMed ID: 25892069.
    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%.
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