Determination of trace amounts of copper with 4-(2-pyridylazo)resorcinol by solid phase spectrophotometry |
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| Authors: | M L Fernández-de Córdova A Molina-Díaz M I Pascual-Reguera L F Capitán-Vallvey |
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| Institution: | 1. Department of Physical and Analytical Chemistry, Faculty of Experimental Sciences, University of Jaén, E-23071, Jaén, Spain
2. Department of Analytical Chemistry, Faculty of Sciences, University of Granada, E-18071, Granada, Spain
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| Abstract: | A determination method for traces of copper by Solid-Phase Spectrophotometry (SPS) has been developed. It is based on the fixation of copper(II) as 4-(2-pyridylazo)resorcinol complex on a styrene-divinylbenzene anion-exchange resin. The resin phase absorbances at 525 and 800 nm are measured directly, and the determination of copper (with a RSD of 1.8%) is possible in the range of 0.3–4.5 μg L?1. The method has been applied to the determination of copper in different samples, i.e. mushrooms, tea, drugs and waters. |
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