Brief Introduction of Mobile Phase Polarity
The essence of the chromatographic process is the process of distributing the equilibrium of the molecules of the substance to be separated between the stationary phase and the mobile phase. The distribution of the different substances between the two phases will be different, which causes the movement speed of the mobile phase to be different, with the flow. The movement of the phases separates the different components of the mixture from each other on the stationary phase.
Normal phase chromatography Liquid chromatography is divided into normal phase and reversed phase chromatography depending on the relative polarities of the mobile phase and the stationary phase.
The case where the polarity of the stationary phase is greater than the polarity of the mobile phase is called normal phase chromatography. Silica gel chromatography and polar bonded phase chromatography can be used for normal phase chromatography. The separation principle of normal phase chromatography is mainly based on the partition coefficient of the compound in the stationary phase and the mobile phase, and it is not suitable for separating geometric isomers.
In reversed-phase chromatography, the polarity of the mobile phase is stronger than that of the stationary phase. The separation principle is hydrophobic, also known as solvophobic. Reversed-phase chromatography is suitable for the separation of compounds bearing different hydrophobic groups, ie compounds of non-polar groups.
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 Brief Introduction of Mobile Phase Polarity Buscar en la categoria : Varios / Descuento Buscar en la categoria : brief, polarity, mobile, introduction, phase |
Martes 08 septiembre 2015
Ubicación : Workshop 6S-V,Valiant Ind.Bldg.,2-12 Au Pui Wan St, Fo Tan, Hong Kong, 852 Fo Tan, Persona a contactar : Ella Zhan, +85 2 26 75 75 58
ZT Technology Group Ltd.
- ellazhan
- 852 - Fo Tan
- +85 2 26 75 75 58
Martes 08 septiembre 2015
Module parameters HD-720P-38*38mm 1.0megapixel low-illumination HD web camera Network Camera - Sensor type 1/4 inch、1.0megapixel , CMOS low-illumination width dynamic sensor - Minimum illumination Color: 1 Lux/F1.2, black and white: 0.02Lux/F1.2 - Electronic shutter 1/5 second ~ 1/50...
ZT Technology Group Ltd.
- ellazhan
- 852 - Fo Tan
- +85 2 26 75 75 58
Martes 07 mayo 2024
Cantidad : demande - Precio : negoce
Bonjour je suis à la recherche d'étre representant des produits ou divers.tandis ce que mon pays senegal est pays de paix .je me profite de vous invites d'une collaboration. Le Sénégal plus connu sous le nom du pays de l'hospitalité se trouve en Afrique de l 'Ouest. Sa capitale...
G.I.E.globalvision
- 9900 - Dakar
- 00221 33 855 74 83
- 00221) 77 948 79 10