Entwicklung von Fliessinjektionsmethoden zur mikrochemischen Bestimmung der freien Wasserstoffionen- und Gesamtwasserstoffionenkonzentration in Regentropfen

(Flow injection methods for the microchemical determination of free and total acidity in rain drops.) Flow injection methods for the determination of free acidity and total acidity are based on the use of a gradient mixing technique followed by UV-visible spectrophotometric detection. Free acidity as well as the sum of free and bonded hydrogen ions can be determined in a 4.5-μl sample by reaction with suitable acid/base indicators. A rapid analysis of the two parameters in single rain drops in dependence on their size is possible.