Abstract
Karl Fischer titration is a very precise and rapid chemically based method to determine the water content specifically. The found values are more reliable than those for the loss on drying (often incorrectly called water content, too). On the one hand, the drying process leads to the loss of all compounds volatile under the applied conditions, even of those which might be produced during the process itself; on the other hand, strongly bound or included water may be retained by the product. It is shown that titrations can be carried out even at the boiling point of methanol. The stoichiometry of the reaction is not altered and the water equivalent of the reagent remains the same as at room temperature. A simple multinecked round-bottomed flask with ground joints proved to be a very tight titration vessel.
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