Technically, there is no limit to the percentage of water that can be used on a bare silica column. However, exposing the column to 100% water would require several hours to re-equilibrate back to typical HILIC conditions. Nevertheless, it is advisable to use 95% water and 5% Acetonitrile to avoid dewetting the phase, unless the column is explicitly labeled as aqueous compatible. After flushing the column sufficiently, a re-equilibration of no fewer than 75 column volumes is recommended.
581502-U
Ascentis® Si (3 µm) HPLC Columns
L × I.D. 15 cm × 2.1 mm, HPLC Column
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Código UNSPSC:
41115700
eCl@ss:
32110501
NACRES:
SB.52
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Permítanos ayudarleNombre del producto
Ascentis® Si HPLC Column, 3 μm particle size, L × I.D. 15 cm × 2.1 mm
Materiales
stainless steel column
Nivel de calidad
Agency
suitable for USP L3
Línea del producto
Ascentis®
Características
endcapped: no
fabricante / nombre comercial
Ascentis®
envase
1 ea of
Parámetros
≤70 °C temp. range
400 bar pressure (5801 psi)
técnicas
HPLC: suitable
LC/MS: suitable
L × D.I.
15 cm × 2.1 mm
superficie
450 m2/g
impurezas
<5 ppm metals
Matriz
fully porous particle
silica gel high purity, spherical
grupo activo de la matriz
silica phase
tamaño de partícula
3 μm
tamaño de poro
100 Å
Intervalo de pH operativo
2-6
aplicaciones
food and beverages
técnica de separación
hydrophilic interaction (HILIC)
normal phase
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Este artículo | 581514-U | 581513-U | 581503-U |
|---|---|---|---|
| particle size 3 μm | particle size 5 μm | particle size 5 μm | particle size 3 μm |
| matrix active group silica phase | matrix active group silica phase | matrix active group silica phase | matrix active group silica phase |
| L × I.D. 15 cm × 2.1 mm | L × I.D. 25 cm × 10 mm | L × I.D. 25 cm × 4.6 mm | L × I.D. 10 cm × 3 mm |
| separation technique hydrophilic interaction (HILIC), normal phase | separation technique hydrophilic interaction (HILIC), normal phase | separation technique hydrophilic interaction (HILIC), normal phase | separation technique hydrophilic interaction (HILIC), normal phase |
| agency suitable for USP L3 | agency suitable for USP L3 | agency suitable for USP L3 | agency suitable for USP L3 |
| product line Ascentis® | product line Ascentis® | product line Ascentis® | product line Ascentis® |
Descripción general
The Ascentis family of columns is the fourth generation of HPLC column technology from Supelco scientists. Ascentis columns are bonded on high purity, 100 Angstrom silica including 3, 5, and 10 micron particle size. Columns are designed for small molecule applications and are scalable from micro columns (1.0 mm I.D.) to preparative dimensions (50 mm I.D.). The family includes C18, C8, Phenyl, Si and embedded polar group phase, RP-Amide.
The Ascentis Si is a high loading capacity silica with excellent peak shape. The Ascentis Si performs in both normal-phase and HILIC/ANP (aqueous normal phase) mode.
The Ascentis Si is a high loading capacity silica with excellent peak shape. The Ascentis Si performs in both normal-phase and HILIC/ANP (aqueous normal phase) mode.
Información legal
Ascentis is a registered trademark of Merck KGaA, Darmstadt, Germany
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Deborah Benhaim et al.
Journal of chromatography. A, 1217(1), 65-74 (2009-11-27)
This study investigates lipophilicity determination by chromatographic measurements using the polar embedded Ascentis RP-Amide stationary phase. As a new generation of amide-functionalized silica stationary phase, the Ascentis RP-Amide column is evaluated as a possible substitution to the n-octanol/water partitioning system
Szabolcs Fekete et al.
Journal of pharmaceutical and biomedical analysis, 49(1), 64-71 (2008-11-29)
The performance of 5 cm long columns packed with shell particles was compared to totally porous sub-2 microm particles in gradient and isocratic elution separations of hormones (dienogest, finasteride, gestodene, levonorgestrel, estradiol, ethinylestradiol, noretistherone acetate, bicalutamide and tibolone). Peak capacities
Shigehisa Uchiyama et al.
Analytical chemistry, 80(9), 3285-3290 (2008-03-18)
A new method for the simultaneous determination of ozone and carbonyls in air using a two-bed cartridge system has been developed. Each bed consists of reagent-impregnated silica particles. The first contains trans-1,2-bis-(4-pyridyl) ethylene (BPE) while the second contains 2,4-dinitrophenylhydrazine (DNPH).
Paweł Kubica et al.
Journal of chromatography. A, 1289, 13-18 (2013-04-04)
Two analytical procedures are proposed where HILIC and RPLC techniques are coupled with tandem mass spectrometry detection for rapid determination of trace amounts of nicotine in zero-level liquids for electronic cigarettes. Samples are prepared on the basis of the approach
Szabolcs Fekete et al.
Journal of pharmaceutical and biomedical analysis, 50(5), 703-709 (2009-06-30)
The performance of a narrow bore silica based monolith column (5 cm x 2 mm) was compared to 5 cm long narrow bore (internal diameter < or = 2.1 mm) columns, packed with shell particles (2.7 microm) and totally porous
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What is the maximum percentage of water that should not be exceeded when using this column to prevent deactivation of the silica?
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