| Abstrakt: |
Transition metal carbides, nitrides, and carbonitrides, known as MXenes, are attracting attention for their potential application in trace detection of heavy metals. This study presents diethylenetriamine-functionalized Ti3C2MXene for trace detection of cadmium and lead ions. Functionalization of Ti3C2significantly improves the adsorption properties of MXenes by replacing native functional groups with silane moieties that contain three amine groups, offering higher affinity for heavy metals. We demonstrate the efficacy of this material as a solid-phase extractor in column-based solid-phase extraction for heavy metal analysis in various food samples. Diethylenetriamine-functionalized Ti3C2coupled with the flame atomic absorption spectrometer exhibits exceptional analytical performance. While maintaining a robust stability for 15 adsorption–desorption cycles, the proposed method shows detection limits of 0.09 ng mL–1for cadmium and 1.7 ng mL–1for lead, with a linear dynamic range of 0.3–50 ng mL–1for cadmium and 5–90 ng mL–1for lead, and relative recoveries of 97.50–101.05 and 98.65–100.80% for cadmium and lead ions, respectively. Additionally, relative standard deviations and enrichment factors were calculated as 0.60–4.70% and 42.3 for cadmium ions and 0.65–1.24% and 44.2 for lead ions. |
