An improved and rapid HPLC-EC method for the isocratic separation of amino acid neurotransmitters from brain tissue and microdialysis perfusates

Bruce A. Donzanti, Bryan K. Yamamoto

Research output: Contribution to journalArticle

299 Scopus citations


An improved, HPLC with electrochemical detection method for the isocratic separation and determination of amino acids from post-mortem brain tissue and from microdialysates of awake-behaving animals is described. Optimal conditions that maximize stability, resolution, and sensitivity were determined for the pre-column derivatization of amino acids using o-pthalaldehyde and B-mercaptoethanol. Ten different amino acids including aspartate, glutamate, taurine, tyrosine and GABA were effectively resolved within 18 min. Tissue measurements from caudate, globus pallidus and substantia nigra showed regional variations in amino acid content. Microdialysis of the striatum yielded significant amounts of all amino acids examined, including GABA, from only 25 μl of perfusate.

Original languageEnglish (US)
Pages (from-to)913-922
Number of pages10
JournalLife Sciences
Issue number11
StatePublished - 1988


ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Pharmacology, Toxicology and Pharmaceutics(all)

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