Multi-pumping flow system for the determination, solid-phase extraction and speciation analysis of iron

A mass calibration was run within the range 0.01-1.75 μg. The detection limit (3sb/S) was 0.01 μg. The repeatability (R.S.D.) was estimated as 1.6% after 10-fold processing of 2 ml of 0.5 mg l−1 Fe solution. When SPE was not required, two linear calibration graph within the ranges 0.05-10 and 0.2-15 mg l−1 for the determination of iron(III) and total iron, respectively, were obtained. The proposed procedure was validated by analysis of certified reference materials. The analytical features were compared with those obtained exploiting MSFIA.