• Dr.M.Renuka
• Dr.D.Mallikarjuna Rao

ABSTRACT A very simple, highly selective and non-extractive spectrophotometric method for the trace amounts of copper(II) has been developed. 2,4-Dihydroxyacetophenone acetoylhydrazone(DAAH) has been proposed as a new analytical reagent for the direct non-extractive spectrophotometric determination of copper(II). The reagent reacts with copper(II) in acidic medium(pH 4.0) to form a pale yellow coloured 1: 1 (M : L) complex. The reaction is instantaneous and the complex shows maximum absorbance at 370 nm. The molar absorptivity and Sandell’s sensitivity are found to be 1.02 x 104 L mol-1 cm-1 and 0.623 μg cm-2 respectively. The system obeys Beer’s law in the range 0.2- 2.0 μg/ml of copper(II). The method is highly selective for copper and successfully used for determination of copper in water samples.

Key words: Spectrophotometric determination, 2,4-dihydroxyacetophenone acetoylhydrazone, Molar absorptivity and water samples.

"Non-extractive spectrophotometric determination of copper(II) in water samples using 2,4-Dihydroxyacetophenone acetoylhydrazone(DAAH)", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 1, page no.182-193, January-2019, Available :http://www.jetir.org/papers/JETIR1901322.pdf

"Non-extractive spectrophotometric determination of copper(II) in water samples using 2,4-Dihydroxyacetophenone acetoylhydrazone(DAAH)", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 1, page no. pp182-193, January-2019, Available at : http://www.jetir.org/papers/JETIR1901322.pdf