Miles Scientific Analtech Silica Gel G (Gypsum) TLC Plates with 0.1N NaOH (Sodium hydroxide), Glass-backed, 250 um, 10 x 20 cm, 25/Pk - P68021

Glass-backed Analytical TLC Plates

Miles Scientific Analtech brand Silica Gel G Thin Layer Chromatography (TLC) Plates, with 0.1N Sodium hydroxide (NaOH) - 250µm Thickness - 10x20cm - 25 plates per Box - 10μm particle, 60Å pore

Product Number: P68021

Weight: 11.10 LBS

• G - (Gypsum) Calcium Sulfate Hemihydrate binder

Sodium Hydroxide (0.1N) Modified Silica Gel G & GF UNIPLATES™

Instead of water, 0.1 N sodium hydroxide is used to prepare the slurry for these plates. This makes the plates more basic and contributes to improved separation of certain compounds, particularly organometallics and some acidic classes.

Analtech Brand Silica Gel G / GF TLC Plates

• Silica Pore: 60Å
• Silica Particle Size: 8-10 μm average
• Binder: Calcium sulfate a.k.a. gypsum (inorganic)
• Hardness: 20-40

Acceptable Solvents:

All typical chromatography solvents (20% water max)

Visualization Techniques:

Compatible with essentially all visualization reagents, even sulfuric acid charring. Spraying reagent is suggested; layer is incompatible with aqueous dipping technique.

General Description:

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.

Silica Gel G & GF UNIPLATES™

Silica Gel G & GF UNIPLATES are the most widely used silica gel TLC plates. No organic substances are added to these products, thus making them compatible with sulfuric acid charring visualization.

These plates are commonly scraped from the glass backing to isolate separated components for other analytical procedures. They are compatible with all organic solvents, however, they are not recommended for use in systems containing greater than 20% water because of the solubility of the gypsum binder in aqueous solutions (For water tolerance see the GHL & GHLF series of plates).

The “G” stands for Gypsum and indicates that calcium sulfate hemihydrate (CaSO4•1/2H2O), a refined form of gypsum, has been included in the adsorbent formulation. Gypsum functions as a binder, improving the cohesion of the adsorbent particles and increasing the adhesion of the layer to the glass substrate. The “F” indicates the presence of a short wave UV indicator that is fluorescent at 254 nm.