Rodrigues, Francisco A. P.Ribas, Tânia C. F.Mesquita, Raquel B. R.Rangel, António O. S. S.2025-11-102025-11-102025-12-01Rodrigues, F. A. P., Ribas, T. C. F., Mesquita, R. B. R., & Rangel, A. O. S. S. (in press). A novel sampling strategy for metal ions determination in water: application to the determination of cadmium. Talanta Open, 12, Article 100574. https://doi.org/10.1016/j.talo.2025.1005742666-831922aa9e54-60db-44bd-9ef8-e5fb8f1a7889http://hdl.handle.net/10400.14/55571This work proposes a novel, portable, and reusable device for in situ water sampling, sample preparation, and analyte enrichment in a single step. For this purpose, a commercial cationic exchange resin (Chelex 100), was used to obtain a solid-phase extraction column for cadmium (II) retention and enrichment. The optimization of key parameters such as sample volume, reagents concentration, and flow-rate, was performed to maximize cadmium retention and elution efficiency. The method was applied to real samples, and the results agreed with those obtained with reference methodologies, with no significant differences (< 10%). Additionally, recovery rates of 97.8 ± 3.5% were achieved. This method integrates, in one step, the sampling and sample preparation procedures and employs reusable devices, contributing to providing a sustainable solution for metal ions monitoring in aquatic environments.engCadmium quantificationSample preparationSampling deviceSolid phase extractionWater samplingresearch article10.1016/j.talo.2025.100574001600349200001