1Research Scholar, School of Basic Sciences, Jaipur National University, Jaipur, Rajasthan, India
2Head, Department of Chemistry and Professor Incharge, Research Cell, Jaipur National University, Jaipur, Rajasthan, India
3Assistant Professor, Department of Chemistry, S.D. Arts, V.S. Apte Commerce and M.H. Mehta Science College, Palghar, Maharashtra, India
4Head, Department of Chemistry, S.D. Arts, V.S. Apte Commerce and M.H. Mehta Science College, Palghar, Maharashtra, India
5Associate Profesor, Department of Chemistry, S.D. Arts, V.S. Apte Commerce and M.H. Mehta Science College, Palghar, Maharashtra, India
*Corresponding author Email id: vaibhavamore1@gmail.com
Online published on 12 April, 2016.
The compound 3-nitrosalicylaldehyde thiosemicarbazone (3-NSTS) is proposed as a new photometric reagent for the extractive spectrophotometric determination of Co (II). It reacts with Co (II) and form a stable colored complex in the pH range 5.5 to 6.5. This was well extracted in n-butanol. The absorption spectrum of Co (II): (3-NSTS) complex in n-butanol shows maximum absorbance at 460 nm. The system obeyed Beer's law up to 2–6 μg cm−3. The molar extinction coefficient was found to be 8.846 × 103 L mol−1cm−1 and the sensitivity of the method as defined by Sandell's sensitivity was 6.688 × 10−3 μg cm−2. The Composition of the extracted species was determined by Job's continuous variation method, mole ratio method and slope ratio method and it was found to be 1:2. The proposed reagent is satisfactorily applied for the determination of trace amount of Co (II) from synthetic and commercial samples.
Solvent extraction, Sandell's sensitivity, Cobalt, n-butanol, 3-Nitro-salicylaldehyde thiosemicarbazone derivative(3-NSTS), Beer's law, mole ratio
