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HPLCAccessories
Kromasil@ HPLC Bulk PackingMaterials
Restek - Your One Source for Krornasil " Bulk Packing Materials
By BeckyWittrig, Ph.D., HPLCProduct Manager
• The Kromasil'" HPLC produc t s you know and trust - available from Restek!
• Perfectly sphe rical, totally porous bulk silica prod ucts.
• Wide range of bonded phases and particle sizes.
HPLC grade silica materials differ greatly from one manufactur er to another. Factors
that affect the selectivity of a silica substrate include the surface area and chemical
purity of the substrate, the pore structure, and the pore diameter distribution .
Kromasi\® HPLC silica products consist of highly spherical, poro us particles in
sizes from 3.5flm to loum and larger. The surface prop erties of the silica have been
optimized, including a narrow pore size distribution and well-defined pore struc­
ture . For chromatographic separations, this ensures higher efficiencies,
smaller pressure drop s, and excellent lot-to-Iot reproducibility.
Kromasilw spherical silicas are produced using a sol-gel techniqu e,
which yields a mechanically stron g part icle with a large surface area
(330m2/g for lOoA silica). Metal impurities are carefully monitored, as trace met­
als in the silica structure increase the surface acidity and can lead to tailing peaks
for basic or chelating compounds. Typical metal content for Kromasilw silicas is
Kromasil '" Bulk Packings
2006.03
shown in Table 1.
Table 1 Typical chem ical purity
fo r Kromasil '" spherical silicas.
Metal Content m
Na < 25
AI < 10
Fe < 10
Basedon AAS or rcp measurements.
• High -purity packing materials in 10 and 16flm.
• All Krornasil" phases available.
Kromasils' bulk packings are available from
Restek in a wide range of particle sizes and
bonded phas es. For more information ,
please contact Restek technical service at
800-356-1688 or 814-353-1300, ext. 4.
Description min. qty. cal# 200-499 grams 500-999 grams ~1000 grams
Krornasil" 100ASilica,10J.1m 200g 92000 57.93/ gram 56.90/g ram 56.13/gram
Krornasil'' 100ASilica, 200g 92001 56.35/ gram 55.52/ gram 54.91/gram
Kromasil" 100A C8, 10 m 92030 511.90/ gram 510.35/.grC- 59.20/ gram e-am-'--__-'--'-'--'c:.:::.:_
Krornasil" 100A C8, 92031 58.28/gram 57.36/ gram 59.52/g"-'ra::.:m'___--:'::::-=~c..='------':.::.:::=-":..::.:.:c'--Kromasilol 00AC18, lOJ.1m
92040 511.90/ gram 510.35/gram 59.20/ gram
Kromasil" 100A 0 8, 16 m 200g 92041 59.52/gram 58.28/ gram 57.36/ gram
KromasilolOOA Chiral DMB, 200g 92080 534.88/ gram 530.33/ gram 526.96/ gram
Kromasilo lOOAChiralOMB, --"'.::::.:...__=
Krornasil" 100AChiral1BB, 200g 91990 534.88/gram 530.33/gram 526.96/ gram
Kromasilol 00AChiral18B, 200g 91991 527.90/ gram 524.26/gram 521.57/gram
200g 92081 527.90/gram _ _ ::.=-::524.26/ gram= 521.57/ gram::::...c.-"'-".::.:-_
Other phases andparticlesizes availableonrequest.
30-Column Storage Cabinet
Tired of stacks of HPLC columns on your lab benches? This easy-to -install cabin et saves space and pro­
tects columns; the hinged door is clear to allow quick identification of column labels or tags.
Description dimensions qty. cal# price
30ColumnCabinet 17l / . x 15x 2'/a" ea. 25159 5119
* Please note: Columns in photograph are not included.
800-356-1688 • • 26 •
Website : E-mail : TelNo : 03 9762 2034 . . . in AUSTRALIA