1.15685

TLC plates, Silica gel 60 RP-18 F₂₅₄s

pkg of 25 plates, plate L × W 5 cm × 10 cm, glass support

• Sinonimo/i: Reverse Phase Silica Gel 60 Plates
• Codice UNSPSC: 41115711
• NACRES: NB.21

Proprietà

• Materiali: glass support; silica gel 60 matrix
• Livello qualitativo: 100
• Caratteristiche: binder Organic Polymer; fluorescent indicator
• Confezionamento: pkg of 25 plates
• tecniche: thin layer chromatography (TLC): suitable
• Spessore strato: 250 μm
• Lungh. × largh. lastra: 5 cm × 10 cm
• Dimensione particelle: 10-12 μm
• Dimensione pori: 60 Å medium pore diameter
• Temperatura di conservazione: 2-30°C

Descrizione

Descrizione generale

25 Glass plates 5 x 10 cm

RP modified plates serve two purposes: act as a pilot method for HPLC and allow to choose various solvent system for special separations. 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.

Applicazioni

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 5x10 cm for thin layer chromatography applications.

Linkage

Replaces: 15685-1; 15685

Risultati analitici

Specific surface area (according to BET; 5-Pt. measurement): 480 - 540 m²/g
Pore volume (N₂-isotherm): 0.74 - 0.84 ml/g
d 50 (laser diffraction, size distribution): 9.7 - 11.7 µm
Layer thickness: 200 - 270 µm
Deviation of layer thickness per plate: ≤ 35 µm
Chromatographic testings:
A) Cholesterin test
hRf-values
- cholesterin, cholesterin test:
30 - 38
B) Steroid test
- methyltestosterone, steroid test: 21 - 31
- Reichstein S, steroid test: 50 - 60
- hydrocortisone, steroid test: 70 - 80
Typical 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)