ECsens, Department of Analytical Chemistry, Faculty of Sciences, University of Granada, E-18071 Granada, Spain.
ECsens, Department of Analytical Chemistry, Faculty of Sciences, University of Granada, E-18071 Granada, Spain.
Anal Chim Acta. 2015 May 4;872:55-62. doi: 10.1016/j.aca.2015.02.045. Epub 2015 Feb 19.
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%.
已开发出一种基于亚甲蓝褪色光度法测定痕量汞的新方法。该方法基于汞离子对溴化十六烷基三甲铵存在下亚甲蓝与碘离子显色反应的强烈抑制作用。在最佳实验条件下，汞浓度在 0.005-0.80μg/mL 范围内与褪色反应的吸光度变化呈良好的线性关系，检出限为 0.002μg/mL（3σ）。该方法用于水样中汞的测定，结果令人满意。
