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Sequential injection system for multiparametric determination of copper (II), zinc and manganese in water samples
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Abstract(s)
Heavy metals such as copper, zinc, and manganese are commonly found in both natural and treated water sources. Although these metals are essential micronutrients, their accumulation even at low concentrations, can lead to serious health issues. Therefore, continuous and accurate monitoring of these elements in environmental and drinking water is crucial to ensure public safety. Solid Phase Extraction (SPE) is a widely used sample preparation technique that relies on sorbent materials to separate and concentrate specific analytes from complex matrices. In heavy metal analysis SPE offers several advantages, such as enhanced sensitivity, selectivity, and compatibility with automated systems. Ion-exchange resins selectively bind to ions based on their charge and therefore are one the most effective sorbents for metal ion separation. While cation-exchange resins retain positively charged metal ions like Cu²?, Zn²?, and Mn²?, anion-exchange resins bind to negatively charged species. This selectivity allows for cleaner separation and more accurate quantification in multi-parametric analysis. The objective of this work is to develop an automated sequential injection analysis (SIA) system integrated with an in-line cation-exchange resin column (Toyopearl) for the simultaneous determination of copper (II), zinc, and manganese in water samples. This system uses a cationic resin coupled with a colorimetric reagent (Zincon) whose selectivity varies with pH, enabling separation of target metal ions and consequent individual quantification. This method presents a reliable and reagent-efficient alternative to conventional techniques, with strong potential for real-time or on-site monitoring applications.
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Citation
Ferreira, F. T. S. M., Ribas, T. C. F., Mesquita, R. B. R., & Rangel, A. O. S. S. (2025). Sequential injection system for multiparametric determination of copper (II), zinc and manganese in water samples. 1-1. Poster session presented at XXII European Conference on Analytical Chemistry, Barcelona, Spain.
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