Peak width and reagent dispersion in flow injection analysis

Determination of rate constants by a double-line flow injection method incorporating a well-stirred tank reactor

“…28 In that work equations were derived for the experimental situation of a fl ow of an alyte through the tank without reaction and applied for chemical systems in which there were fast reactions; the product peak mimics the an alyte peak for such reactions. The equations that define the leading edge of the FI peak contain a term for the flow of analyte into the chamber and a term for the removal of analyte at the same fl ow rate after instantaneous mixing.…”

“…Equation describing the passage of a slug of solution (concentration vs. time) through a well-stirred mixing device under conditions of 'no-reaction' and 'reaction'. No-reaction 28 Eqn. Reaction Eqn.…”

Putting the chemistry back into analytical chemistry

“…The time interval between two points on the profile represents the time between points of equal dispersion in the system. It has been shown by several research · groups that for exponential peak shapes (which are produced by well-stirred tanks) the width of the peak is a logarithmic function of concentration (35)(36)(37). This has the advantage that (a) the quantitative parameter is no longer dependent on a particular detector response-concentration relationship and thus restrictions, such as adherence to Beer's law, may be relaxed and (b) the working range is considerably increased at the high concentration end.…”

Atomic spectrometry and flow injection analysis: a synergic combination

“…The basis of the single, well-stirred tank model, in which all dispersion ef fects are considered to be due to plug flow into a tank with only one inlet and outlet, and the concentration is detected at the outflow with no further disper sion, has been described in detail [ 86]; the equations for the rise curve, peak maximum, fall curve and peak width have been derived [87].…”