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A selective and sensitive chemosensor, based on the 2(4-hydroxy pent-3-en-2-ylideneamine) phenol (HPYAP) as chromophore, has been developed for colorimetric and visual detection of Ag(I) ions. HPYAP shows a considerable chromogenic behavior toward Ag(I) ions by changing the color of the solution from pale-yellow to very chromatic-yellow, which can be easily detected with the naked-eye. The chemosensor exhibited selective absorbance enhancement to Ag(I) ions in water samples over other metal ions at 438 nm, with a linear range of 0.4-500 μM (r(2)=0.999) and a limit of detection 0.07 μM of Ag(I) ions with UV-vis spectrophotometer detection. The relative standard deviation (RSD) for 100 μM Ag(I) ions was 2.05% (n=7). The proposed method was applied for the determination Ag(I) ions in water and waste water samples.
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| http://dx.doi.org/10.1016/j.saa.2011.07.060 | DOI Listing |
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