Grace Catalog 2008

prep | flash | tlc
GraceAlpha Silica
GraceAlpha (patent pending) is built on a completely
new silica platform that incorporates over 80 years of
silica technology at Grace to produce the ultimate in
chromatographic performance.
High-porosity exterior
increases mass transfer.
Extreme Porosity
The base silica particle has an extremely high porosity at
its surface that increases mass transfer leading to higher
efficiencies and superior loading capacity. The high porosity
structure has the increased benefit of adding an elastic quality
to the silica surface allowing the particles to flex and exhibit
a spring like effect when packed into a column. This further
stabilizes the packed bed preventing voids from forming and
allows the particles to pack tighter, yielding higher efficiencies
in packed beds.
Dense inner core provides
exceptional strength
Dense Core
Typically the high porosity structure would result in a weak
particle prone to breaking, but the GraceAlpha particle
combines the high porosity outer region with a dense inner
core that results in a particle that resists breaking and forming
fines that contribute to high backpressures.
GraceAlpha Silica Specifications
Pore Size:
120Å
Pore Volume:
0.95mL/g
Surface Area: 325m 2 /g
Chemical Purity: