1.05567

TLC aluminum sheets, Silica gel 60/Kieselguhr F₂₅₄

pkg of 25 sheets, sheet L × W 20 cm × 20 cm, aluminum support

• NACRES: NB.21
• UNSPSC Code: 41115711

Eigenschaften

• Quality Segment: 100
• material: aluminum support, silica gel 60 matrix
• feature: binder Organic Polymer, fluorescent indicator
• packaging: pkg of 25 sheets
• technique(s): thin layer chromatography (TLC): suitable
• layer thickness: 200 μm
• plate L × W: 20 cm × 20 cm
• sheet L × W: 20 cm × 20 cm
• particle size: 10-12 μm
• pore size: 60 Å medium pore diameter
• storage temp.: 2-30°C

Beschreibung

General description

25 Aluminium sheets 20 x 20 cm

Precoated Kieselguhr or mixed Silica gel/Kieselguhr plates are only of small importance nowadays. Kieselguhr layers are used like cellulose layers for the TLC separation of polar and moderately polar substances. Polyamide, on the other hand , is used for the separation of flavonoids and other phenolic substances.

Analysis Note

Layer thickness: 170 - 220 µm
Deviation of layer thickness per plate: ≤ 30 µm
Chromatografic testings:
A) colour test
hRf-values
- bleu vif organol, colour test, lipophile:
20 - 30
- Ceres Black G, colour test, lipophile: 50 - 60
- ceres Violet brn, colour test, lipophile: 60 - 70
Typical value determined on a conditioned sheet
Eluent: toluene (45% rel. humidity)
B) PHB- Ester
- phb-methylester, phb-ester-test: 20 - 30
- phb-ethylester, phb-ester-test: 30 - 40
- phb-propylester, phb-ester-test: 40 - 50
Typical value determined on a sheet
Eluent: Pentane/ glacial acetic acid (88/12 v/v)

Other Notes

Replaces: 5567-7; 5567