THE ESTIMATION OF 3,4‐DIHYDROXYPHENYLACETIC ACID, HOMOVANILLIC ACID AND HOMO‐lSOVANILLIC ACID IN NERVOUS TISSUE BY GAS‐LIQUID CHROMATOGRAPHY AND ELECTRON CAPTURE DETECTION

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Abstract
1 A gas chromatographic method using electron capture detection is described for the estimation of three acidic metabolites of dopamine, 4-hydroxy-3-methoxyphenylacetic acid (homovanillic acid, HVA), 3,4-dihydroxyphenylacetic acid (DOPAC) and 3-hydroxy-4-methoxyphenylacetic acid (homo-isovanillic acid, iso-HVA). The method is based on the formation of the trifluoroacetyl-hexafluoroisopropyl derivatives of the three acids. 2 The method has been applied to the estimation of DOPAC, HVA and iso-HVA in tissues from the central and peripheral nervous systems.

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