Miles Scientific Analtech Alumina G (Gypsum) Prep TLC Plates, Glass-backed, 500 um, 20 x 40 cm, 25/Pk - P03052

Glass-backed Prep TLC Plates

Miles Scientific Analtech Brand Alumina G Prep Thin Layer Chromatography (TLC) Plates - Glass-backed - 500µm thickness - 20x40cm - 25 plates per box

Product Number: P03052

Weight: 25.10 LBS

• G - (Gypsum) Calcium Sulfate Hemihydrate binder

Alumina G & GF UNIPLATES™

Using a slurry containing calcium sulfate hemihydrate as a binder, these plates are analogous to Silica Gel G UNIPLATES, but with aluminum oxide as the adsorbent. The pH is neutral to slightly basic. Coatings are available in both analytical and preparative thicknesses.

Considered to be the original “Classic” TLC plate. Gypsum (calcium sulfate) binder produces softer layer for easy scraping and removal of spots or bands for further analysis. This is the best choice when preparative work is needed using thicker coatings to isolate larger quantity of material. Because the binder is inorganic, it is compatible with aggressive visualization techniques such as sulfuric acid charring. Limited water tolerance due to slight solubility of calcium sulfate in water precludes dipping procedure but is applicable with spray techniques.

Preparative TLC plates have adsorbent layers thicker than the 250m microns. Thus, preparative plates can be used for separation of larger quantities of materials. The loading capacity for a given degree of sample component resolution increases roughly as the square root of the adsorbent layer thickness. In preparative TLC, materials to be separated are often applied as long streaks rather than spots. After development, specific compounds may be recovered by scraping the adsorbent layers from the plate in the region of interest and eluting the separated material from the adsorbent using a strong solvent.

• Thicker layers for higher capacity 
• Full range of plate sizes
• Prep-scored option for convenient zone location
• Available with preadsorbent sample loading zone
• Calcium sulfate binder-soft later for easy scraping