• Amarendra Mohan Khan
• Nadira Arif
• Vinay Kumar Singh
• Narinder Kumar Agnihotri

A reagent, 4-(2-pyridylazo) resorcinol has been reported for the determination of trace amounts of Cu(II) in presence of a non-ionic surfactant, Triton X-100 using derivative spectrophotometry. Water-insoluble Cu(II) complex with 4-(2-pyridylazo) resorcinol has been solubilized in an aqueous phase in presence of a neutral surfactant, Triton X-100 and studied in normal and derivative mode. Important analytical figures, such as molar absorption coefficient (), specific absorptivity (a), and Sandell's sensitivity (S) of the Cu(II)-PAR complex at 510 nm (max) in neutral micellar media are 4.88 × l04 L mol-l cm-l, 0.77 mL g-l cm-1 and 1.30 ng cm-2, respectively. The IUAPC detection limit and Beer’s law range of Cu(II) determination are 1.40 ng mL-1 and 0.13 - 2.54 g mL-1, respectively. The conditional stability constant of the 1:2 complex formed at optimum experimental conditions is 5.67 × 108 L2 mol-2. Interference due to the presence of cations, anions, and complexing agents has been studied in normal as well as derivative modes. The proposed cost-effective, sensitive, and simple derivative spectrophotometric procedure is successfully applied to determine Cu(II) contents in commercially available alcoholic beverages and a biological specimen. The analysis results are in good agreement with those obtained with atomic absorption spectrometry.

4-(2-pyridylazo) resorcinol; Copper; Triton X-100; Non-ionic micellar media; Trough depth; Peak height

"", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 12, page no.e262-e285, December-2021, Available :http://www.jetir.org/papers/JETIR2112433.pdf

"", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 12, page no. ppe262-e285, December-2021, Available at : http://www.jetir.org/papers/JETIR2112433.pdf