Flow injection analysis of high chloride levels in electroplating baths using on-line dialysis and potentiometric detection |
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Authors: | A. N. Araújo M. B. Etxebarria J. L. F. C. Lima M. C. B. S. M. Montenegro R. Pérez Olmos |
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Affiliation: | (1) CEQUP-Departamento de Quimica Fisica, Faculdade de Farmácia, P-4000 Porto, Portugal;(2) Departamento de Química Analítica, Escuela Universitaria de Ingenieria Técnica Industrial, E-48012 Bilbao, Spain |
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Abstract: | A method for the flow injection analysis (FIA) of high concentrations of chloride in electroplating baths using potentiometric detection is proposed. The system includes a unit of dialysis to promote dilution of samples and a tubular electrode with an homogeneous crystalline membrane as detector. The system was optimized in order to analyse samples within a broad range of concentrations and at high levels of chloride, thereby making pretreatment of the samples unnecessary. It results in a simple manifold applicable over the 4.0×10–2 and 3.0 mol L–1 range with a throughput of about 30 samples/h. Seven different plating bath samples were analysed by the proposed method and the quality of the results compared with those obtained by the conventional procedure. Satisfactory agreement was observed. |
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