| http://www.w3.org/ns/prov#value | - For this purpose a method according to the invention is characterized in that with a repetition time T/2n, where n is an integer, a calibrating amount of constituents to be measured is introduced into the measuring cell, the sawtooth measuring signal is filtered electrically also at a frequency of 2n/T and the mean amplitude of the resulting filtered signal is measured and by means of a divider ci
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