2 – hydroxy 1 naphthaldehyde thiosemicarbazone HNT is synthesized in laboratory and characterized by NMR, IR and elemental analysis for its purity. This reagent forms a yellowish green coloured complex with Ni II which can be quantitatively extracted into ethyl acetate at pH 7. Complex in ethyl acetate shows an intense absorption peak 430 nm. It is observed that Beers law is obeyed in the range of 10µg to 100µg of metal solution. It gives linear and reproducible graph under appropriate conditions, the complex having a molar absorptivity of 0.275 x 10 6L mol 1 cm 1, Sandells sensitivity calculated was found to be 0.275 x 102 µg cm 2 .Nature of the extracted complex, determined by Jobs continuous variation method, Slope ratio method and Mole ratio method shows that the composition of Ni II HNT is 1 1. Interference by various ions is studied and masking agents used where required. The proposed method has been applied for the determination of Ni II in various samples. The results of the analysis are found to be comparable with those obtained by standard method.
by Pradnya Lokhande "Solvent Extraction and Spectrophotometric Determination of Nickel (II) using 2 – Hydroxy 1- Naphthaldehyde Thiosemicarbazone (HNT) as an Analytical Reagent"
Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-3 , April 2019,
URL: https://www.ijtsrd.com/papers/ijtsrd22964.pdf
Paper URL: https://www.ijtsrd.com/chemistry/analytical-chemistry/22964/solvent-extraction-and-spectrophotometric-determination-of-nickel-ii-using-2-%C3%A2%E2%82%AC%E2%80%9C-hydroxy-1--naphthaldehyde-thiosemicarbazone-hnt-as-an-analytical-reagent/pradnya-lokhande
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