Fig. 2. A schematic representation of the flow injection model used for the determination of total and dissolved labile Ni(ii) in various environmental water samples. P1 and P2: peristaltic pumps; B: blank; E: eluent; BS: buffer solution; M: mixing coil; DC: digestion chamber; FAAS: flame atomic absorption spectrometer; IV: injection valve; MC: microcolumn containing the resin Serdolit Chelite Che; S/SS: sample or standard solution; SV1, SV2, SV3 and SV4: selecting valves; UB: ultrasonic bath; UW: ultrapure water; W: waste. This scheme is represented with permission from reference no. 53. Copyright SciRes 2011 (http://www.SciRP.org/journal/ajac).
