β Scribed by M. Vecchi; J. Vesely; G. Oesterhelt
No coin nor oath required. For personal study only.
Some results obtained by gas chromatography and high-pressure liquid chromatography in vitamin A analysis are given. In. particular, it was demonstrated that high-pressure liquid chromatography surpasses gas chromatography as an analytical tool for this application.
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## Analysis of vitamin A in eggs by high pressure liquid chromatography Semih o d e s and Yasar Hisil A high speed liquid chromatographic method was described for the rapid determination of vitamin A in eggs. After saponification and extraction, the sample was separated on a reversed-phase column
Paired ion high-pressure liquid chromatography was useful for separating intact catecholamines (epinephrine, isoproterenol, levodopa, and methyldopa) and phenylephrine from some of their decomposition products. Furthermore, methyldopa was separated from either hydrochlorothiazide of levodopa. Under