This Spectroquant ® Copper Reagent Test allows the accurate quantification of the copper content in aqueous samples. Method applied: In an ammoniacal medium copper (II) ions react with cuprizone to form a blue complex which is determined photometrically. This chapter comprehensively evaluates recent advances in analytical methods for detecting copper, including atomic spectrometry, molecular spectrophotometry, electrochemical sensors, voltammetry, and chromatography. However, excess copper. The SPECTROCHECK stationary metal analyzer is designed to meet the performance requirements — and budgets — of small foundries, both ferrous and non-ferrous, plus automotive suppliers and other metal fabricators. This high-quality, compact and affordable instrument is ideal for routine analysis of. SPECTROPHOTOMETRIC DETERMINATION OF THE COPPER CONTENT OF BRASS INTRODUCTION Solutions containing copper (II) ions have a distinctive color.