Abstract

Priyanka Melwin Rodrigues^1* and Sunetra Rajendra Chaudhary¹

DOI : http://dx.doi.org/10.13005/ojc/400210

The highly reactive 5-Chlorosalicylaldehyde thiosemicarbazone (CSTSC) has been employed as an extractive reagent to create a simple and precise spectrophotometric technique for detecting Cu(II) spontaneously. The complex of 5-Chlorosalicylaldehyde thiosemicarbazone and Cu(II) has been quantitatively extracted in n-butyl acetate in the pH range of 5.4–6.4 after equilibrating for 60 sec. Up to 5.0 μg mL-1 concentration of Cu(II), the complex of 5-Chlorosalicylaldehyde thiosemicarbazone with Cu(II) in n-butyl acetate follows Beer’s law, with its maximum absorbance occurring at 380 nm. By employing the Jobs continuous variation method, the composition 1:1 has been determined for the Cu(II)-CSTSC complex, and this finding is further supported by the mole ratio method. The extracted complex remained stable for 72 hours. 5.48 x 10-3 μg cm-2 was determined to be Sandell's sensitivity, whereas 1.16 x 104 L mol-1 cm-1 was the molar absorptivity. Commercial and synthetic samples have been effectively analysed using this method.

Analysis; n-Butyl acetate; Copper; CSTSC; Extraction; Pharmaceutical samples

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