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.
53814-U
Ascentis® Express 90 Å C18 (2.7 μm) HPLC Columns
L × I.D. 10 cm × 3 mm, HPLC Column
Synonyme(s) :
Core-shell (SPP) Fused Core C18 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.
Produits recommandés
Nom du produit
Colonne de CLHP Ascentis® Express C18, 2,7 μm, 2.7 μm particle size, L × I.D. 10 cm × 3 mm
Matériaux
stainless steel column
Niveau de qualité
Agence
suitable for USP L1
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.
10 cm × 3 mm
Superficie
135 m2/g
Impuretés
<5 ppm metals
Matrice
Fused-Core particle platform
superficially porous particle
Groupe de la matrice active
C18 (octadecyl) phase
Taille des particules
2.7 μm
Dimension de pores
90 Å
pH de fonctionnement
2-9
Application(s)
food and beverages
Technique de séparation
reversed phase
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Description générale
Les colonnes de CLHP Ascentis Express, grâce à la technologie des particules Fused-Core®, vous permettent de bénéficier de la grande vitesse et de l′efficacité élevée des particules inférieures à 2 μm, tout en maintenant des contre-pressions plus faibles. L′association de la grande efficacité et des faibles contre-pressions est avantageuse pour les utilisateurs de systèmes UPLC® (ou d′autres systèmes à ultra-haute pression), ainsi qu′aux utilisateurs de la CLHP conventionnelle.
Rendez-vous sur la page d′accueil Ascentis Express pour obtenir plus d′informations sur cette nouvelle technologie de colonne.
Rendez-vous sur la page d′accueil Ascentis Express pour obtenir plus d′informations sur cette nouvelle technologie de colonne.
Application
Analyse CLHP des capsaïcines dans la poudre de piment sur l′Ascentis®Express C18, 2,7 μm
Analyse UHPLC/MS de l′huile de maïs sur l′Ascentis® Express C30 par comparaison à l′Ascentis®Express C18
Analyse CLHP du paracétamol et des impuretés \sur l′Ascentis®Express C18, 2,7 μm
Analyse CLHP des parabènes sur l′Ascentis®Express C18, 2,7 μm
Analyse UHPLC/MS de l′huile de maïs sur l′Ascentis® Express C30 par comparaison à l′Ascentis®Express C18
Analyse CLHP du paracétamol et des impuretés \sur l′Ascentis®Express C18, 2,7 μm
Analyse CLHP des parabènes sur l′Ascentis®Express C18, 2,7 μm
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
Application
Réf. du produit
Description
Tarif
Colonne de garde
Réf. du produit
Description
Tarif
Produit(s) apparenté(s)
Réf. du produit
Description
Tarif
Mention d'avertissement
Warning
Mentions de danger
Conseils de prudence
Classification des risques
Skin Sens. 1
Code de la classe de stockage
12 - Non Combustible Liquids
Classe de danger pour l'eau (WGK)
WGK 3
Point d'éclair (°F)
Not applicable
Point d'éclair (°C)
Not applicable
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Lot/Batch Number
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Protocoles
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Chromatograms
application for HPLCapplication for HPLCapplication for HPLCapplication for HPLCAfficher plus-
What flow rate should I use with Ascentis® Express HPLC Columns?
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Can I use Ascentis Express on any type of HPLC system?
1 answer-
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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Can Ascentis® Express HPLC Columns be used for LC-MS?
1 answer-
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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Is there anything special I need to do to my HPLC system to use Ascentis Express?
1 answer-
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).
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What is the carbon load for Ascentis® Express C18 HPLC Columns?
1 answer-
Carbon load which is commonly referred to as %Carbon is misleading and not meaningful for Ascentis® Express. Since Fused-Core™ particle is unique in the sense that it has a solid core and porous shell, the %Carbon number can not be compared to traditional porous particles. The carbon coverage for Ascentis® Express C18 is 3.5 micromoles/meter-squared
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Can I use Ascentis Express on a UHPLC system?
1 answer-
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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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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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?
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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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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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