Composition Analysis of Electrolytic Etching Solutions

This technical report presents a methodology for analyzing electrolytic etching solutions using high-resolution inductively coupled plasma optical emission spectrometry (HR ICP-OES) with the PlasmaQuant 9100 Elite. The study addresses the analytical challenges associated with trace impurity control and quantification of matrix elements in etching solutions, which are critical in industries such as aerospace and automotive. The report outlines the composition of etching solutions, which typically contain concentrated acids and various matrix elements that complicate analysis due to spectral interferences. The methodology includes sample preparation, calibration strategies, and evaluation parameters to ensure accurate quantification of trace elements. Results indicate that standard-addition calibration is recommended for quantifying trace impurities, while aqueous standard calibration can determine matrix constituents effectively. The report concludes that maintaining low impurity levels is essential for quality control in manufacturing processes involving etching and electroplating.