Acchrom takes the lead in China to realize the large-scale production of high-performance chromatography silica gel, and has mastered the technology of precise regulation of silica gel series parameters, the particle size of silica gel can range from micron level to 100 micron level, and the pore size of silica gel can range from 10 nm level common pore size to 100 nm level super pore size, all of which can be precisely regulated according to the actual demands.

• Particle size precision control technology
• Pore size control technology
• Specific surface area precise control technology
• Ultra large pore size silica gel preparation technology
• Silica gel surface activity optimization technology
• Silica gel scale production technology

Packing characteristics

Silica gel

● Excellent surface properties, with relatively high chromatographic retention capacity compared to other brands of the same size. Meanwhile, the number of active sites on the surface is relatively small, which contributes to the reduction of dead adsorption and the improvement of separation stability and silica gel service life.

● Chromatographic column: 10um, 4.6mmx250mm

● Column temperature: 30°C

● Flow rate: 1.0mL/min

● Detection wavelength: 220nm

● Mobile phase：n-hexane/Ethanol=90/10
● 1、Tri-tert-butylbenzene; 2、2-Nitrophenol; 3、Nitrobenzene; 4、Phenol; 5、4-Nitrophenol; 6、Pyridine; 7、4-Nitroaniline

Note: Pyridine has a certain alkalinity, which is easy to interact strongly with active silicon hydroxyl or metal impurities in the neutral mobile phase, resulting in long retention time or serious tailing

Diol

● Advanced bonding technology is adopted to modify the silica gel surface with diol group, which greatly reduces the activity of silanol group and effectively improves the separation stability and service life of the packing material, and also has strong chromatographic retention ability. In addition, the selectivity of the separation of certain samples can differ relative to silica gel

Conditions:

Chromatographic column: 10um, 4.6mmx 250mm

Column temperature: 30 °C

Flow rate: 1.0mL/min

Detection wavelength: 220m

Mobile phase: n-hexane/Ethanol 90/10
1、Tri-tert-butylbenzene; 2、Nitrobenzene; 3、2-Nitrophenol; 4、Pyridine; 5、Phenol; 6、4-Nitrophenol; 7、4-Nitroaniline

Diol-based packing chromatographic evaluation

The retention and tailing of pyridine were greatly reduced due to the modification of the silanol group. The selectivity of nitrobenzene and 2-nitrophenol also changed significantly