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Updated: May 15, 2025

Fabrication of a Dipole-assisted Solid Phase Extraction Microchip for Trace Metal Analysis in Water Samples
Published on: August 7, 2016
Development of an iron-metal organic Framework-based dispersive solid phase extraction coupled with flame atomic
Zeynep Teki N Semerci1,2, K Übra Karakebap1, Devrim Nur Karaman1
1Yıldız Technical University, Department of Chemistry, 34220 İstanbul, Turkey. bsezgin23@yahoo.com.
Abstract:
An iron-based metal organic framework (Fe-MOF) constructed using terephthalic acid as an organic linker was synthesized and characterized for its implementation in a dispersive solid-phase extraction (dSPE) procedure. This strategy was combined with a flame atomic absorption spectrophotometry (FAAS) system and employed for the preconcentration and trace level detection of copper in lion's claw tea samples. Under optimal conditions, the Fe-MOF based dSPE-FAAS method achieved a limit of detection (LOD) of 2.0 μg L-1 and a limit of quantification (LOQ) of 6.7 μg L-1. The determination coefficient (R2) was found to be 0.9984 for the concentration range of 5.0-100 μg L-1, indicating superior linearity for the developed Fe-MOF-dSPE-FAAS method. The sensitivity was enhanced by 88.2 folds. Moreover, acceptable recovery percentages at five different spiked levels within the concentration range of 7.5-75 μg L-1 for the lion's claw tea sample matrix were achieved through the application of a matrix matching strategy.
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