On-line Preconcentration and Determination of Cd(II) in Water by Flow Injection-Flame Atomic Absorption Spectrometry (FI-FAAS) Using Salicylic Acid Functionalized Amber lite XAD-2 Resin-Packed Minicolumn

A simple, sensitive, and inexpensive flow injection solid phase extraction (SPE) system was developed for the determination of trace level concentrations of Cd(II). The salicylic acid immobilized on Amber lite XAD-2 (AXAD2-SA) has been synthesized via azo-coupling and was used for on-line preconcentration of Cd(II) with a flow injectionflame atomic absorption spectrometer (FI-FAAS) as the detection method. This novel setup demonstrates the determination of trace Cd(II) in underground water samples. All main parameters affecting the complex formation, sorption, and elution of Cd(II) were optimized thoroughly. The results demonstrated that the AXAD2-SA resin enriched Cd(II) quantitatively over an optimal pH range