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In this service, free-solution capillary electrophoresis (CE), or capillary zone electrophoresis, with direct UV detection is used for the determination of mono- and disaccharides, sugar alcohols, and ethanol in fermentation broths. The CE conditions can be adapted to the type of fermentation by simply altering the background electrolyte (BGE). Ethanol determination is achieved by coupling the CE method to pressure mobilization, using the same instrument and the same sample.