2001•Chinese Journal of Spectroscopy LaboratoryRequires access

Study on Spectrophotometric Determination of Copper(II) with 2-(2-Quinolinylazo)-1,5-Dihydroxybenzene

Jiang Chen

Abstract

quinolinylazo) 1,5 dihydroxybenzene(QADHB) was synthetized and color reaction of copper(Ⅱ) with QADHB was studied.In cetyltrimethylammonium bromide(CTMAB) medium and pH=4.0 buffer solution,QADHB can react with copper(Ⅱ)to form a stable 2∶1 complex.The molar absorptivity is 2 12×10 4L·mol -1 ·cm -1 at540nm.Beer's law is obeyed in the range of 0—30μg/25mL.This method was applied to the determination of copper in environmental sample with satisfactory results.

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Key concepts: Molar absorptivity, Copper, Chemistry, Bromide, Color reaction, Spectrophotometry, Buffer solution, Inorganic chemistry