A Double-Line Sequential Injection System for the Spectrophotometric Determination of Copper, Iron, Manganese, and Zinc in Waters.

Examines a double-line sequential injection system developed for the spectrophotometric determination of several metal ions in waters. Configuration; Application of the methodology to the spectrophotometric determination of copper, iron, manganese and zinc; Chromogenic reagents and detection wavelengths; Analytical characteristics of the methodology; Results of the analysis that were in agreement with those obtained by atomic absorption spectrometry.