Journal of the American Society of Brewing Chemists · 1998 · 10 citations · 1 references
PharmacyChemistryAnalytical ChemistryChromatographic AnalysisSeparation ScienceAnalytical ChromatographyChromatographyLiquid ChromatographyOrganic AcidsAcid Content AnalysisFoam QualityHigh-performance Liquid ChromatographyHigh-performance Liquid Chromatography AnalysisHigh-performance Liquid Chromatography Method Development
An improved method for the measurement of tetrahydro-iso-α-acids and iso-α-acids in beer is presented. The method is based upon the HPLC separation of hop acids on a C8 reverse-phase column using gradient elution with a citrate buffer at a pH of 7.0. The method is suitable for measurement of small additions of tetrahydro-iso-α-acids for foam improvement as well as for the determination of trace amounts of iso-α-acids in a beer designed to be light stable.
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