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Asian Journal of Research in Chemistry
Year : 2019, Volume : 12, Issue : 4
First page : ( 208) Last page : ( 212)
Print ISSN : 0974-4169. Online ISSN : 0974-4150.
Article DOI : 10.5958/0974-4150.2019.00039.7

Photometric Determination of Cobalt (II) after Adsorption of its 1-Benzoyl-3-(2-pyrimidyl) thiourea Complex on Polyurethane Foam

Verma Shalini1, Mathur S. P2, Verma Savita3

1Department of Biotechnology, Chandigarh Group of Colleges, Landran, Mohali (Punjab)

2Department of Pure and Applied Chemistry, Maharshi Dayanad Saraswati University, Ajmer

3Department of Chemistry, Sophia Girls College, Ajmer

*Corresponding Author E-mail: shaqrs@yahoo.com, sv52898@gmail.com, shalini.3203@cgc.edu.in

Online published on 19 December, 2019.

Abstract

A new method for the photometric determination of trace amount of cobalt (II) with 1-benzoyl-3-(2-pyrimidyl) thiourea is described. Cobalt (II) forms a stable water insoluble complex with 1-benzoyl-3-(2-pyrimidyl) thiourea at pH 4.0 which is extracted by adsorption on prepared polyurethane foam. It is then dissolved in 10 ml of chloroform and maximum absorbance is observed at 460 nm. Beer's law is verified over the concentration range 20–120 μg of cobalt (II) in 10 ml chloroform. The molar absorptivity is found to be 3.38 x 104 dm3 mol−1 cm−1 and sensitivity being 0.016 μg cm−2 of cobalt (II) for the absorbance of 0.001. The effect of analytical parameters i.e. pH, buffer solution. Reagent concentration, quantity of adsorbent and diverse metal ions are investigated to incorporate the optimum conditions in the present study

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Keywords

Copper (II), 1-benzoyl-3-(2-pyrimidyl) thiourea, polyurethane foam, reagent concentration, adsorbent.

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