J. Bio. Env. Sci.15(4), 1-9, October 2019
Metals play vital role in living and environmental systems. Some metals are essential and others are toxic for biological system. Manganese, iron, copper and cobalt are essential, while arsenic, lead and cadmium are toxic. Essential elements can show toxic effect, when their concentration is above certain level; so their monitoring is necessary for their role. The research purpose was to establish rapid, convenient, sensitive, and reproducible spectrophotometric method for the detection of Cd (II) ions at trace level using NNPh reagent in 1.0% SDS micellar media and replaced the old solvent extraction method, which was time consuming, costly and use of toxic solvents. The proposed method is simple, rapid and environmental friendly. Stoichiometric metal to ligand ratio was found 1:2 for the Cd-[NNPh]2 formation. The coefficient molar absorption (ε) was found 1.02´104Lmol-1cm-1 at λmax 579.9nm. Linear calibration curve was obtained over the concentration range 0.5-4.0μgmL-1. The proposed method was applied for the investigation of Cd(II) from different alloys, biological, environmental and pharmaceutical samples.
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