Spectrophotometric determination of trace amounts of acetylacetone in aqueous solutions

Abstract A sensitive spectrophotometric method for the determination of trace amounts of acetylacetone in aqueous solution is carried out. In the presence of bicarbonate solution, diazotized anthranilic acid reagent reacts rapidly with acetylacetone to form a yellow-colored compound with maximum absorption at 330 nm, which is water-soluble and reasonably stable. Adherence to Beer's law is observed in the range 20–200 μg of acetylacetone/25 ml, with a molar absorptivity of 19.5 × 10 3 liters mol −1 cm −1 , a sensitivity index of 0.0051 μg cm −2 , relative to + 0.3 to −0.9%, and a relative standard deviation of 0.5–1.4%, depending on the concentration level.