Process for the quantitative determination of at least one parameter of a liquid or gaseous sample
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United States of America Patent
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Apr 28, 1992
Grant Date -
N/A
app pub date -
Jul 31, 1989
filing date -
Aug 2, 1988
priority date (Note) -
Expired
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Abstract
For the simultaneous measurement of two parameters of a liquid or gaseous sample, in a fluorescence measuring device in which the influence of the aging processes of the indicator substance and the fluctuations in the light intensity of the excitation light source are to be avoided, it is proposed that the change in the first parameter to be measured is obtained from the change in the ratio of two intensity values, determined for different wavelengths of the excitation and emission spectrum of the indicator substance, and the change of a second parameter is obtained from the change in the decay time t of the fluorescence radiation of the same indicator substance from the group of aromatic hydrocarbons, the aromatic heterocycles and the metal organic complexes.
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