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Silica Gel for Column-layer Chromatography

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Characteristics:
Column chromatography silica gel is a strong polar solid adsorbent of hydrogen bonds type, its chemical composition is SiO2·H2O.Column chromatography silica gel presents white powder-like particle form,non-taxic, tasteless, insoluble in water and organic solvents. It does not react with any other chemical materials except for hydrofluoric acid and hot alkali.
Column chromatography silica gel is a kind of porous material with Si-OH covered on the surface. The different components in mixed system in its hole are absorbed by the active site-Si-OH, and competitive adsorption exists between solvent molecules and solute molecules, solute molecules on these active sites Si-OH, resulting in the difference of residence time of different components, so as to achieve separation or purification.
Raw material of column chromatography silica gel is specially customized produced, with a specific pore size distribution and the distribution of surface hydroxyl groups, high purity and low impurity, low dissolution of micro or trace impurities, non-pollution to substances being separated. With patented vibrating screen in line with the human body bionics in production process, products screening out if of uniform size distribution, high theoretical plate number, high column efficiency, large peak capacity, high resolution. Flow rate of column is stable in application regardless of atmospheric pressure or pressurization.

Use:
Column chromatography silica gel is widely used in pharmaceutical sciences, plant sciences, biotechnology, fine chemicals, organic synthesis, material science, life science, environmental science, grain food and other fields.

Size:
Column chromatography silica gel has two kinds of size: I reagent grade; II industrial grade.

Storage:
Stored in dry and ventilated place. Do not co-deposit with volatile substances in order to avoid moisture absorption, or adsorption of other chemical substances to affect the separation performance.

Custom-made
Particle size, pore volume, pore size, PH, moisture, packaging, impurity content, etc. can be produced according to the user agreement.


Size Comparison text

sizesizesizesize
meshμmmeshμmmeshμmmeshμm
20-40425-85080-100150-180100-160100-150100-20075-150
40-80180-42580-120125-180160-20075-100200-30050-75
60-80180-250100-120125-15070-23063-212300-40038-50
60-100150-250100-140106-150230-40038-63500-80015-25


Specification

 

Item

Specifications

I

II

tpye

ZCX-1

ZCX-2

ZCX-4

ZCX-1

ZCX-2

ZCX-3

Chloride (CL)%  ≤

0.02


Iron (Fe) %  ≤

0.02


Lead (Pb) %  ≤

0.001


Arsenic (As) %  ≤

0.0003


Heavy metal(by Pb) %  ≤

0.003


PH(100g/l aqueous suspension)

6.0-7.0

6.0-8.0

Loss on heating  %  ≤

3.0

5.0

Pore volume (ml/g)

0.30-0.50

0.80-1.10

0.70-0.85

0.3-0.5

0.8-1.1

0.7-2.00

Specific surface area (m2/g)

400-600

300-450

450-550

400-600

300-450

30-300

Qualified size ratio

Size(mesh)

100-200

200-300

230-400

100-200

200-300

300-400

Ratio  %  ≤

80

60

60

80

60

60


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