Unmodified Standard Silica layers
High purity silica 60, specific surface (BET) ~ 500 m
2
/g, mean pore size 60 Å,
specific pore volume 0.75 mL/g, particle size 5–17 µm
Different binder system compared to SIL G results in different separation characteristics
Special feature of the POLYGRAM
®
SIL N-HR: higher gypsum content
Available as POLYGRAM
®
polyester sheets with fluorescent indicator