Journal
JOURNAL OF NUTRITIONAL SCIENCE AND VITAMINOLOGY
Volume 55, Issue 3, Pages 292-295Publisher
CENTER ACADEMIC PUBL JAPAN
DOI: 10.3177/jnsv.55.292
Keywords
gamma-aminobutyric acid; HPLC; DNP-derivative; determination of gamma-aminobutyric acid
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A method for the determination of gamma-aminobutyric acid (GABA) in foodstuffs has been developed by combination of its dinitrophenylation and high-performance liquid chromatography (HPLC) using norleucine as an internal standard. GABA was converted to its stable derivative with 1-fluoro-2,4-dinitrobenzene and the derivative was extracted with ether. After evaporation of the extract. the residue was dissolved in 0.1 M NaOH and the solution was subjected to reversed-phase HPLC with an elution system of a linear gradient of methanol in 1.0 mM Tris-HCl buffer (pH 6.0) and a detection system monitoring the absorbance of the effluent at 400 nm. The present method was shown to be utilized as a satisfactory method for the determination of gamma-aminobutyric acid in foodstuffs.
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