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53825-U
Ascentis® Express 90 Å C18 (2.7 μm) HPLC Columns
L × I.D. 15 cm × 2.1 mm, HPLC Column
Sinonimo/i:
Core-shell (SPP) Fused Core C18 HPLC column
About This Item
Prodotti consigliati
Nome del prodotto
Colonna per HPLC Ascentis® Express C18, 2,7 μm, 2.7 μm particle size, L × I.D. 15 cm × 2.1 mm
Materiali
stainless steel column
Livello qualitativo
agenzia
suitable for USP L1
Nome Commerciale
Ascentis®
Caratteristiche
endcapped
Produttore/marchio commerciale
Ascentis®
Confezionamento
1 ea of
Parametri
60 °C temp. range
600 bar max. pressure (9000 psi)
tecniche
HPLC: suitable
LC/MS: suitable
UHPLC-MS: suitable
UHPLC: suitable
Lungh. × D.I.
15 cm × 2.1 mm
Area superficiale
135 m2/g
Impurezze
<5 ppm metals
Matrice
Fused-Core particle platform
superficially porous particle
Gruppo funzionale matrice
C18 (octadecyl) phase
Dimensione particelle
2.7 μm
Dimensione pori
90 Å
pH di lavoro
2-9
applicazioni
food and beverages
Tecnica di separazione
reversed phase
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Descrizione generale
Per ulteriori informazioni su questa nuova tecnologia, si rimanda alla pagina Ascentis Express
Applicazioni
Analisi UHPLC/MS dell′olio di mais con la colonna Ascentis® Express C30 confrontata con Ascentis® Express C18
Analisi UHPLC del paracetamolo e delle sue impurezze con la colonna Ascentis® Express C18, 2,7 μm
Analisi HPLC dei parabeni con la colonna Ascentis®Express C18, 2,7 μm
Note legali
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Applicazioni
Precolonna
Prodotti correlati
Raccomandato
Codice della classe di stoccaggio
11 - Combustible Solids
Classe di pericolosità dell'acqua (WGK)
WGK 3
Punto d’infiammabilità (°F)
Not applicable
Punto d’infiammabilità (°C)
Not applicable
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Chromatograms
application for HPLCapplication for HPLC-
What is the Department of Transportation shipping information for this product?
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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Is there anything special I need to do to my HPLC system to use Ascentis Express?
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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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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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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?
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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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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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What flow rate should I use with Ascentis® Express HPLC Columns?
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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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What is the carbon load for Ascentis® Express C18 HPLC Columns?
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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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