Flame atomic absorption spectrometric determination of μg amounts of Fe (III) ions after solid phase extraction using modified octadecyl silica membrane disks

The linear dynamic range of the proposed method for Fe (III) ions was found in a wide concentration range of 0.20 (± 0.05)-680 (± 2) μg l− 1. The detection limit and preconcentration factor of this solid phase extraction method were found 20.0 (± 0.7) ng l− 1 and 100 respectively. The reproducibility of the procedure is at the most 1.5%.