Detection of Heavy Metal Ions using Silica bead having Azobenzene Derivatives
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A variety of techniques for the determination of heavy metal ions have been investigated intensively in the literature including spectroscopy, chromatography, electrophoresis, and fluorescence detection.[1,2] Sensing technologies for cations have become very important for both biological and environmental applications. in response, a large class of cation sensors based on coordination chemistry has been developed. Several are selective for both alkali and alkaline earth metals, such as lithium, sodium, potassium, zinc, calcium and magnesium, in which detection is necessary to monitor and regulate a number of cellular functions. Heavy metal cations such a lead and mercury have also been studied, due to their deleterious effects on biological system. In addition, there are several other environmental concerns were prepared by diazotization reaction.