Ratnamala P. Sonawane, R.S. Lokhande, Utkarsha M. Chavan, Development of Method for Extractive Spectrophotometric Determination of Cu(II) with 2-Hydroxy-1-Naphthalene Carboxaldehyde Phenyl Hydrazone as an Analytical Reagent, ILCPA Volume 14, International Letters of Chemistry, Physics and Astronomy (Volume 14)
    A spectrophotometric method has been developed for the determination of Cu(II) using 2-Hydroxy-1-Naphthalene carboxaldehyde phenyl hydrazone as an extractive reagent. The reagent forms a coloured complex, which has been quantitatively extracted into n-butanol at pH 9.2. The method obeys Beer’s law over arrange from 1 to 10 ppm. The Molar absorptivity and Sandell’s sensitivity were 0.97 × 10<sup>4</sup> L mol<sup>-1</sup>cm<sup>-1</sup> and 0.26 µg·cm<sup>-2</sup> respectively. The proposed method is very sensitive and selective. The method has been successfully applied to synthetic and commercial samples.
    2-Hydroxy-1-Naphthalene, Carboxaldehyde Phenyl Hydrazine, Copper Spectrophotometric Determination, n-Butanol