Unmodified standard silica layers with concentrating zone for TLC.

• High-quality silica gel with kieselguhr zone
• Rapid sample application
• Always regular substance spots

Also after arbitrary application of the substances in the concentrating zone the developed chromatogram shows regular spots for a reliable detection.

Silica 60: Specific surface (BET) ~ 500 m²/g; specific pore volume 0,75 ml/g; particle size 5 to 17 μm.

Kieselguhr: Small surface of low activity.