Simultaneous Determination of Copper (II) and Cobalt (II) Ions by H-Point Standard Addition Method

A new, simple, inexpensive and sensitive method for the simultaneous spectrophotometric determination of Cu(II) and Co(II) by H-Point Standard Addition method has been reported . 3-Hydroxy-3-(4- Methyl Phenyl) -1-(3-Chloro, 2- Methyl Phenyl) Triazene (HMCPT) was used as reagent at pH 6.7-7.2. This method is based on the difference in the absorbance of yellow complexes of above reagent with Cu(II) and Co(II) at different wavelength pairs. The result showed that Cu(II) and Co(II) can be determined simultaneously with concentration ratio of 3:1 and 1:3. This method was successfully applied to the determination of these metals in synthetic samples.