Analysis Note

Specific surface area (according to BET; 5-Pt. measurement): 480 - 540 m²/gPore volume (N₂-isotherm): 0.74 - 0.84 ml/gd 50 (laser diffraction, size distribution): 9.5 - 11.5 µmLayer thickness: 200 - 270 µmDeviation of layer thickness per plate: ≤ 35 µmChromatographic testings: A) Cholesterin testhRf-values - cholesterin, cholesterin test: 30 - 38B) Steroid test - methyltestosterone, steroid test: 21 - 31 - Reichstein S, steroid test: 50 - 60 - hydrocortisone, steroid test: 70 - 80Typical value determined on an activated plate (120°C, 15 min) Eluent a) aceton/ water (95/5 v/v) Eluent b) acetonitrile/ water (70/30 v/v)

Application

Glass TLC plates, RP-18 modified silica gel coated with flourescent indicator F254s. The RP-18 modified silica gel TLC plates come in a quantity of 25 size 20x20 cm for thin layer chromatography applications.

General description

RP modified plates serve two purposes: act as a pilot method for HPLC and allow to choose various solvent system for special separations. Our RP-modified silica layers are well suited for many separation challenges that unmodified silica cannot overcome. These layers use aqueous solvent systems to separate extremely non-polar substances and analyze particular polar substances that can adapt to ion-pair chromatography. What's more, RP-modified silica layers are less dependent on atmospheric humidity. Unlike unmodified silica, RP-phases do not exhibit catalytic activity. This makes them the plates of choice for unstable substance that tend to experience oxidative degradation.

25 Glass plates 20 x 20 cm

Linkage

Replaces: 15389-7; 15389

Packaging

25 units in Fibre case