Abstract
A new electrolyte system for the analysis of inorganic and organic anions by capillary electrophoresis (CE) in single raindrops (nl–μl) and single fog- or clouddrops (fl–pl) is developed. It is possible to separate the main anions occurring in rain, fogs and clouds (chloride, nitrate, sulphate, oxalate, malonate, formate, maleinate, adipinate, acetate, azelate, propionate, butyrate, valerate, pelargonate) in a single run. The analysis time is 5 min. Absolute limits of detection are in the range 30–70 fmol using indirect UV-detection. The applicability of the newly developed electrolyte system is demonstrated for the analysis of single fogdrops and raindrops.
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