Atakol, ArdaZeydanlı, DamlaGöver, TuğçeAtakol, MelikeSerbest, HakanKarakebap, KübraBüyük, Muhammed AliAtakol, OrhanBakırdere, Sezgin2025-02-112025-02-112025Atakol, A., Zeydanlı, D., Göver, T., Atakol, M., Serbest, H., Karakebap, K., Büyük, M. A., Atakol, O., & Bakırdere, S. (2025). Trace determination of cobalt in heather leaf tea by matrix matching calibration assisted flame atomic absorption spectrometry following a dispersive liquid–liquid microextraction utilizing a Schiff base ligand. Measurement, 248, pp. 1-7. https://doi.org/10.1016/j.measurement.2025.1168791873-412X0263-2241https://doi.org/10.1016/j.measurement.2025.116879https://hdl.handle.net/20.500.13055/920In this study, an analytical method that involves dispersive liquid–liquid microextraction for extraction and enrichment of Co was developed for its determination in heather leaf tea infusions. N,N’-bis(2-hydrox yacetophenylidene)-1,3-propanediamine was utilized to form the complex extracted in chloroform with meth anol as a dispersive solvent. The experimental parameters were optimized to allow for an enhancement of detection power by 35.6-folds compared to direct FAAS measurements while lowering the limit of detection to 0.0154 mg/L and the limit of quantification to 0.0513 mg/L and providing a linear range of 0.050–0.75 mg/L. Spiked recovery experiments were conducted on two brands of heather leaf tea where a matrix matching strategy was employed for further reduction of interferences. The recovery results obtained in the range of 78.7–128.4 % supported the accuracy of the proposed method that promises an economical and easy-to-apply process for the trace determination of cobalt in herbal tea matrices.eninfo:eu-repo/semantics/closedAccessDispersive liquid–liquid microextractionCobaltHeather leafFlame atomic absorption spectrometryArticle10.1016/j.measurement.2025.11687924817WOS:0014231545000012-s2.0-85216888857Q1