β-correction Spectrophotometric Investigation of Copper Chelate Solution with Acid Chrome Blue K Determination of Trace Copper

Abstract

The present work reports uses the updated principle named

β-correction theory to analyse spectrophotometrically copper

chelate solution with acid chrome blue K (ACBK). The complexation

ratio and real molar absorptivity (ε_r) of chelate formed and

effective percentage of ligand ACBK have been worked out easily

and acceptably. Using this reaction trace amount of copper has also

been determined accurately by β-correction spectrophotometry. The

results show that the chelate formed is expressed by Cu(ACBK) at

pH 12. Its ε_r = 1.52 X 10^–1 L mol^–1 cm^–1 at 580 nm. Beer's law is

obeyed over the concentration range 0–2.00 mg/L Cu. The relative

standard deviations are less than 3.7% and the recovery of copper

between 94–108%.