F. Albertus et al., Non-linear calibration in single point flow titration of protolytes - A comparison of model options by using Delta Test, ANALYT CHIM, 414(1-2), 2000, pp. 221-237
The complete description of the non-linear absorbance/concentration relatio
nship obtained for systems used in single point photometric flow injection
titrations of acids and bases is presented. The applicability of different
models for fitting calibration data, as well as the more frequently used da
ta processing options, are investigated under normal and restraining condit
ions by using experimental and simulated data sets. Theoretical and empiric
al models are examined in order to choose the simplest and the more efficie
nt ones to provide good recoveries. The comparison among models is based on
a novel statistical criterion (Delta Test) for contrasting the prediction
efficiency by detecting systematic errors in estimated concentrations. (C)
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