Multisyringe Flow Injection System
Replacing the peristaltic pump with a syringe pump is a logical extension of instrument development. The advantages of using syringe pumps for FI applications were recognized by Japanese researchers long ago (Yoza 1977), yet the technique became widely used only recently when applications of Multisyringe Flow Injection Systems (MSFIA) were developed (Cerdá 1999, 2002). Advantages of MSFIA are:
1.4.4.
- resistance of pumps to corrosive chemicals
- precise control of liquid delivery
- capability of programmable flow, including stop flow FI for reaction rate measurement
- no need to replace peristaltic pump tubing
As in all modern FIA instrumentation, computer control is an essential component of the MSFIA
design. While software could enable the user to control syringes individually, such a degree of freedom could cause more complications than advantages. Therefore, the preferable pump design is to move all syringes simultaneously by the same drive, while the flow rates are selected by choice of syringe sizes.
Principles of MSFIA were recently reviewed (Cerdá 2008). State of the art and prospects of MSFIA were critically assessed in a comprehensive work that also summarizes sampling strategies and practical applications of this technique, including on line microwave digestion (Segundo 2006).
Yoza, N., Ishibashi, K., Ohashi, S. J. Chromatography 134, 497 (1977)
Cerdá V. et al., Talanta 50, 695 (1999) Miró M., Estela J.M., Cerdá V., TRAC 21, 199 (2002)
V. Cerdá and J. M. Estela Injection techniques in Flow Analysis. Ch2 in M. Trojanowicz Ed.
Advances in Flow Analysis Wiley Ny.2008
