Effect of variables influencing S 1/2 in sequential injection analysis. Extrapolability of S 1/2 based results between SIA designs.

The influence of variables including ionic strength, propulsion rate and instrumental design parameters on dispersion in a sequential injection analysis system was studied via S(1/2) and several other parameters related to the dispersion profile. The influence of such parameters on a real system was evaluated in the reaction of Fe(II) with o-phenanthroline by optimizing various instrumental designs using the simplex method and comparing the results.