In many tests there is a need to separate the substance of interest from the rest of the sample prior to the analysis. e.g. SO2 in food/wine and free fatty acids. Here a steam distillation often is the best solution. For best performance it is important that the speed of the steam production can be controlled. Steam distillation is also very often used in the Kjeldahl method.
Analyses where it is important to perform the titration simultaneously with the distillation e.g. Kjeldahl put high demands on the titration system. The colorimetric detection of the end point is often the only possibility. Even tougher it becomes if the Nitrogen level varies a lot from sample to sample, then the unique Predictive Titration System improves the function.