A novel organic reagent N-(2-thienylmethylene) phenyl hydrazine is synthesised and used as a useful chromogenic reagent for rapid simultaneous determination of nickel(II) and cobalt(II) by differential spectrophotometry. This method allows the determination of 0.2-1.23 ppm of nickel(II) and 0.25-1.5 ppm of cobalt(II) in mixtures with good precision and accuracy. It has advantages of simplicity, less time consumption and no prior separations etc.
SYED K A SHERAZI ,ZAHID H CHOHAN ,
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