An improved purification procedure is described for the simultaneous assay of endogenous choline and acetylcholine by pyrolysis gas chromatography, particularly for providing a simple and effective method for propionylation of choline in the presence of acetylcholine. The reaction was carried out in acetonitrile solution prepared by dissolving the evaporated residue of the supernatant of brain homogenate. Thus samples for propionylation were prepared without the use of ion-exchange chromatography.
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| http://dx.doi.org/10.1016/s0378-4347(00)81181-0 | DOI Listing |
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