Factors Affecting the Performance of C18 HPLC Columns
Physical properties of the chromatographic column could affect the performance of C18 HPLC columns.
Performance factors of C18 HPLC columns:
Silica gel purity
Class A silica gel has high residual silica hydroxyl with a negative charge and high metal content on the acidic surface, which leads to trailing of alkaline compounds.
Due to the low metal content and high silica hydroxyl pKa of class B silica gel, tail dragging of alkaline compounds does not occur.
Performance factors of C18 HPLC columns:
Column size
Short column – short running time, low column pressure
Long column – high resolution, long running time
Narrow diameter column – detector has high sensitivity
Performance factors of C18 HPLC columns:
Particle shape and size
When the mobile phase with high viscosity is used, the spherical particles can reduce the column pressure and prolong the life of the column. Smaller particles have higher column efficiency but can cause column pressure to be too high.
Performance factors of C18 HPLC columns:
Surface area and aperture
The high surface area has strong retention capacity, column capacity and separation degree for separating multi-component samples. Low surface area fillers usually reach equilibrium quickly and are particularly important for gradient leaching.
Persona a contactar : Bruce Lu, +86 29 89284429
Buen trato: comprar del vendedor
Por favor, lea nuestras condiciones de uso. También puede visitar nuestras preguntas frecuentes y ver nuestra información sobre los riesgos relacionados con la falsificación.
|
Esta página es acerca de los importadores y exportadores de Factors Affecting the Performance of C18 HPLC Columns Buscar en la categoria : Varios / Descuento Buscar en la categoria : factors, hplc, performance, columns, affecting |
Thursday 25 March 2010
Cantidad : 500 - Precio : cif prix raisonable,
notre société a la recherche d'un fourniseur high tech produits Pc portable,(dell, toshiba, hp, acer,.......) neuf et camera digital cannon ,nikon...neuf a prix cif raisonable et compétativeUbicación : TUNISIE, 2045 TUNIS, Persona a contactar : Samira Sfs,
SFS PLANET
- godgod
- 2045 - TUNIS
- +21 6 93 22 63 65
Saturday 01 November 2008
Cantidad : 300-1000 p
Made to order Baseball cap with logo embroidery. Minimum quantity from Thailand 300 pcs, China 1000 pcs. Your colors, your design. Different peak options. High quality. Ask price for your order. We also offer design service and assistance.Ubicación : Sino-Thai Tower 18th Fl. 32/47...
JH-Premium Co., / JH-Fashion Group Co., Ltd
- jhpremium
- 10110 - Bangkok
- +66 2 665 2870
- +66 8 46 71 39 65
Friday 12 August 2011
Cantidad : 1000000CAR - Precio : negotiable
WE ARE REPUTED DEALERS OF GEMSTONES AND DIAMONDS.WE HAVE ALL TYPES OF GEM THAT IS RANGING FROM AQUAMARINE TO PEARL GEMS.WE SUPPLY AT AFFORDABLE PRICES AND OUR GEMS ARE OF HIGH QUALITY AND MEETS UP TO 99% PURITY.IF INTERESTED IN BUYING YOUR GEMSTONES DO NOT HESITATE TO CONTACT USUbicación ...
ets.mankaa
- dunois
- - yaounde
- +23 7 96 18 29 09




