These are special TLC layers of silica mixed with ion exchange resins available as two different layers, both containing an inert organic binder.

• IONEX-25 SA-Na: mixture of silica and a strongly acidic cation exchanger coated to polyester sheets
• IONEX-25 SB-AC: mixture of silica and a strongly basic anion exchanger coated to polyester sheets

They are recommended for amino acids, e.g., in protein and peptide hydrolysates, in seeds and fodder, in biological fluids; for racemate separation in peptide syntheses, for the separation of nucleic acid hydrolysates, amino sugars, amino carboxylic acids, antibiotics, inorganic phosphates, cations and other compounds with ionic groups.

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