Two Common Adsorbents for Adsorption Chromatography
Let's take a look at two common adsorbents for adsorption chromatography.
Polyamide
The polyamide adsorbent can be divided into nylon 6 (polycaprolactam) and nylon 66 (polyhexamethylene adipamide), which are hydrogen bond adsorption and semi-chemical adsorption. There are many amide groups in the polyamide molecule, and C=O on the polyamide forms hydrogen bonds with phenol groups, flavonoids, -OH or -COOH in the acid. The amino group in the amide group forms a hydrogen bond with a sulfhydryl group or a nitro group in the hydrazine or nitro compound.
Separation is caused by the difference in the structure of the separated substances or the difference in the number and position of the reactive groups in the same type of structural compound, which affects the ability of the polyamide to form hydrogen bonds.
Activated carbon
Activated carbon is a non-polar adsorbent, so contrary to silica gel and alumina, it has strong affinity for non-polar substances and strong adsorption capacity for solutes in water. When the polarity of the solvent is lowered, the adsorption capacity of the activated carbon for the solute is also reduced. When the adsorption capacity of the adsorbent is constant, the polarity of the solute is stronger, and the polarity of the eluent is weaker.
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 Two Common Adsorbents for Adsorption Chromatography Buscar en la categoria : Varios / Descuento Buscar en la categoria : adsorbents, chromatography, common, adsorption |
Miércoles 17 febrero 2016
Cantidad : 2000MT - Precio : $3500/MT CIF
2016 (New Crop New Harvest) Color: Brown Odor: Characteristic Quality: Handpicked clean Size: Homogenous CG3 Volatile oil: 20%-25% Foreign matter: 0% Moisture: 13% - 15% Baby Cloves: 2% Max. Origin: Madagascar Packing: 50 Kg Bag New Jute Bags Minimum Quantity: 1 X 20 FCL...
KHUN JACK PARTNERSHIP LIMITED
- 50000 - CHIANG MAI
- +66 9 56 19 49 81
Lunes 08 octubre 2012
Cantidad : Conference - Precio : Conference with clie
- Frequency measuring range; 0.1 Hz to 100 MHz in A, B input, 80 MHz to 3.0 GHz in C input - Period and Total measurement - Time interval and Ratio measurement - Trigger level adjustment - Separate and Common mode - Slope mode selectable -9 Digit display Product Name: Universal...
Dagatronics Corporation
- 411-808 - Geonggi-do
- +82 3 19 16 80 05
Sábado 20 febrero 2016
Cantidad : 1000 MT PE - Precio : 300/mt CIF
PUMPKIN SEEDS GROWN WITHOUT SHELL NEW CROP 2015 TOP GRADE AND COMPETITIVE PRICE PRODUCT DETAILS AND SPECIFICATIONS Product name Dark Green Pumpkin Seeds Year of production Crop 2016 Origin Thailand Grade A,AA grade Style Common or Organic Moisture 9%max Purity 99...
Khun Jack Partnership Ltd
- 5000 - Chaing Mai
- +66 9 68 75 20 43