A Simple and Efficient Extraction Method for the Preconcentration of Copper in Tap Water and Linden Tea Samples Prior to FAAS Measurement

摘要

In this study, a simple, low-cost and eco-friendly analytical method namely syringe assisted pipette tip dispersive solid phase extraction (SA-PT-DSPE) combined with slotted quartz tube-flame atomic absorption spectrometry (SQT-FAAS) system was presented for the determination of copper at trace levels in linden tea and tap water samples. Under the optimal experimental conditions, limit of detection (LOD) and quantifi- cation (LOQ) values obtained for the SA-PT-DSPE-SQT-FAAS system were calculated as 3.7 and 12.5 μg/L, respectively. The SA-PT-DSPE-SQT-FAAS system provided a 44.0-folds improve- ment in detection power of the conventional FAAS. The recovery results for tap water samples were calculated close to 100% via external calibration strategy. Negative matrix effects on the analyte were observed for linden tea samples. Therefore, recovery studies were performed by matrix matching calibra- tion strategy and percentage recoveries were found to be between 88.0-102.0% with low standard deviation values.