Nothing special is required to use Ascentis Express HPLC columns. To obtain the full benefits of Ascentis Express, one should minimize dispersion in the HPLC system (tubing, detector flow cell) as well as confirm the detector response system is set at a fast level. For more information, request Guidelines for Optimizing Systems for Ascentis Express Columns (T407102).
53843-U
Ascentis® Express 90Å C8 (2.7 μm) HPLC Columns
L × I.D. 7.5 cm × 2.1 mm, HPLC Column
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About This Item
Code UNSPSC :
41115700
eCl@ss :
32110501
Nomenclature NACRES :
SB.52
Le tarif et la disponibilité ne sont pas disponibles actuellement.
Nom du produit
Ascentis® Express C8 HPLC Column, 2.7 μm particle size, L × I.D. 7.5 cm × 2.1 mm
Matériaux
stainless steel column
Niveau de qualité
Agence
suitable for USP L7
Gamme de produits
Ascentis®
Caractéristiques
endcapped
Fabricant/nom de marque
Ascentis®
Conditionnement
1 ea of
Paramètres
60 °C temp. range
600 bar max. pressure (9000 psi)
Technique(s)
HPLC: suitable
LC/MS: suitable
UHPLC-MS: suitable
UHPLC: suitable
L × D.I.
7.5 cm × 2.1 mm
Superficie
135 m2/g
Impuretés
<5 ppm metals
Matrice
Fused-Core particle platform
superficially porous particle
Groupe de la matrice active
C8 (octyl) phase
Taille des particules
2.7 μm
Dimension de pores
90 Å
Plage de pH de fonctionnement
2-9
Application(s)
food and beverages
Technique de séparation
reversed phase
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Description générale
Ascentis Express HPLC columns, through the use of Fused-Core® particle technology, can provide you with both the high speed and high efficiencies of sub-2 μm particles while maintaining lower backpressures. The combination of high efficiency and low backpressure benefits UPLC® (or other ultra high pressure system) users, as well as conventional HPLC users.
Visit the Ascentis Express home page for more information on this new column technology.
Visit the Ascentis Express home page for more information on this new column technology.
Informations légales
Ascentis is a registered trademark of Merck KGaA, Darmstadt, Germany
Fused-Core is a registered trademark of Advanced Materials Technology, Inc.
UPLC is a registered trademark of Waters
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Réf. du produit
Description
Tarif
Nécessaire, mais non fourni
Réf. du produit
Description
Tarif
Produit(s) apparenté(s)
Code de la classe de stockage
11 - Combustible Solids
Classe de danger pour l'eau (WGK)
WGK 3
Point d'éclair (°F)
Not applicable
Point d'éclair (°C)
Not applicable
Faites votre choix parmi les versions les plus récentes :
Certificats d'analyse (COA)
Lot/Batch Number
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Si vous avez besoin d'une version particulière, vous pouvez rechercher un certificat spécifique par le numéro de lot.
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Retrouvez la documentation relative aux produits que vous avez récemment achetés dans la Bibliothèque de documents.
Ugandar Reddy Inugala et al.
Journal of chromatographic science, 51(5), 453-459 (2012-10-13)
This paper describes the development of a rapid, novel, stability-indicating gradient reversed-phase high-performance liquid chromatographic method and associated system suitability parameters for the analysis of naproxcinod in the presence of its related substances and degradents using a quality-by-design approach. All
Federica Pellati et al.
Journal of pharmaceutical and biomedical analysis, 81-82, 126-132 (2013-05-07)
A closed-vessel microwave-assisted extraction (MAE) technique was optimized for the first time for the extraction of polyphenols from raw propolis. The results obtained by means of response surface experimental design methodology showed that the best global response was reached when
Sreenivasa Rao Chitturi et al.
Journal of pharmaceutical and biomedical analysis, 55(1), 31-47 (2011-02-15)
This paper proposes a simple and selective RP-HPLC method for the determination of process impurities and degradation products (degradants) of atazanavir sulfate (ATV) drug substance. Chromatographic separation was achieved on Ascentis(®) Express C8, (150mm×4.6mm, 2.7μm) column thermostated at 30°C under
Monika A Olszewska
Journal of separation science, 35(17), 2174-2183 (2012-07-19)
An HPLC method of high resolution has been developed and validated for the simultaneous determination of ten prominent flavonoid aglycones in plant materials using a fused-core C18-silica column (Ascentis® Express, 4.6 mm × 150 mm, 2.7 μm). The separation was
Imran Ali et al.
Biomedical chromatography : BMC, 26(8), 1001-1008 (2012-01-13)
Superficially porous silica particles columns (SPSPCs) are manufactured by different companies. The most common have the brand names Halo, Ascentis Express and Kinetex. These columns provide super fast, sharp peaks and moderate sample loading and back pressure. These are available
Articles
When a C18 doesn′t give the desired separation, or your sample contains compounds that are known to be difficult to retain or resolve on a C18, consider changing to an Ascentis® Express C8 column.
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Is there anything special I need to do to my HPLC system to use Ascentis Express?
1 answer-
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Can I use Ascentis Express on a UHPLC system?
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Yes. Ascentis Express columns are packed in a way making them suitable for these ultra high pressure instruments. In fact, Ascentis Express outperforms sub-2 μm micron columns on many applications since Ascentis Express provides the benefits of sub-2 μm particles but at much lower back pressure. These benefits include the capability of providing fast HPLC and higher resolution chromatography. The Fused-Core particle consists of a 1.7 μm solid core and a 0.5 μm porous shell. A major benefit of the Fused-Core particle is the small diffusion path (0.5 μm) compared to conventional fully porous particles. The shorter diffusion path reduces axial dispersion of solutes and minimizes peak broadening.
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Can I use Ascentis Express on any type of HPLC system?
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Ascentis Express HPLC columns are capable of use on standard HPLC systems as well as UHPLC systems. Columns are packed in high pressure hardware capable of withstanding the pressures used in UHPLC systems.
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Do I need special fittings and tubing to connect Ascentis® Express HPLC Columns?
1 answer-
While operating pressures may not exceed the 400 bar (6,000 psi) capability of your traditional instruments, sustained pressures of about 200 bar (3,000 psi) will exceed the recommended pressure for conventional PEEK tubing and fittings at the column inlet. We recommend changing to stainless steel fittings in all high pressure locations and have designed special High Performance HPLC Fittings/Interconnects that will stay tight at pressures of 1,000 bar (15,000 psi) or greater, even when elevated column temperatures are employed.
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How can I measure my instrument bandwidth (IBW) and determine what Ascentis® Express HPLC Columns can be used with minimal efficiency loss created by too much internal instrument volume?
1 answer-
The Guide to Dispersion Measurement has simple instructions on how to measure IBW and can be found at sigma-aldrich.com/express.
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What is the Department of Transportation shipping information for this product?
1 answer-
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
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Can Ascentis® Express HPLC Columns be used for LC-MS?
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Express Fused-Core™ particles were designed with LC-MS in mind. Even extremely short column lengths exhibit sufficient plate counts to show high resolving power. The flat van Deemter plots permit resolution to be maintained at very high flow rates to maximize sample throughput. All Ascentis stationary phases have been evaluated for MS compatibility during their development, and the Express phases are no exception. You can expect extremely low column bleed and background while maintaining longest possible column lifetime. A bonus of Ascentis Express columns for high throughput UHPLC and LC-MS is that they are extremely rugged and highly resistant to plugging, a very common failure mode for competitor columns.
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What flow rate should I use with Ascentis® Express HPLC Columns?
1 answer-
Based on the minimum in the van Deemter curves, higher flows than 5um particle columns are required in order to maximize Ascentis Express column efficiency. The suggested starting point for flow rate for Ascentis Express columns: 1.6 mL/min for 4.6 mm ID; 0.8 mL/min for 3.0 mm ID; and 0.4mL/min for 2.1 mm ID.
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