Es wurden handelsiibliche PSitosterin-Praparate gaschromatographisch untersucht und dabei gefunden, dal3 sie stets aus zwei Substanzen bestanden. Der Begleiter des wahren PSitosterins wurde als Campesterin identifiziert. Die Zusammensetzung der Handelspraparate schwankte zwischen 58 bis 63 % PSitosterin und 42 bis 37 % Campesterin. The Composition of Commercial Hitosterol RoductsCommercial Psitosterol products have been studied by gas-chromatography, and it was found that they consisted always of 2 substances. The accompanying substance of the real P-sitosterol was identified as campesterol. The composition of the commercial products fluctuated between 58-63 % Psitosterol and 42--37 % campesterol. GaschromatographieHewlett-Packard/Moseley Gaschromatograph, Typ 5 754 C , Flammenionisationsdetektor. Kolonne: 1,8 m lange Glassaule, hnendurchmesser 2 mm, gefiillt mit 1 % SE-30 + 1 % QF-1 auf HP Chromosorb WAW DMCS 80/100 mesh, Stickstoff a k Triigergas. EinlaStemperatur: 270°, Saulentemperatur 240 bzw. 260". 9 C. H. Brieskorn und H. Herrig, Arch. Pharmaz. 292, 485 (1959).Arch. Pharmaz. 0-Sitosterin-hiparate107 Zusammensetzung der verschiedenen ,, pfltosterin " -R a p a t e RaparatBSitosterin Qmpesterin ,,pSitosterin" Aldrich Chem. Co.,
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