Civil silica gel
Silica Gel for Column-layer Chromatography
| ITEM | Index | |||||
| Type Ⅰ | Type Ⅱ | |||||
| ZCX-1 | ZCX-2 | ZCX-3 | ZCX-1 | ZCX-2 | ZCX-3 | |
| Chlorides(CI)，% ≤ | 0.02 | |||||
| Iron(Fe), % ≥ | 0.02 | |||||
| PH(100g/l water suspension) | 6.0-7.0 | 6.0-8.0 | ||||
| Lead(Pb),% ≤ | 0.001 | |||||
| Arsenic(As),% ≤ | 0.0003 | |||||
| Heavy metals(by Pb),% ≤ | 0.003 | |||||
| Loss on heating, % ≤ | 3.0 | 5.0 | ||||
| Specific surface,m2/g | ≥550 | 300-500 | 200-300 | ≥550 | 300-500 | 200-300 |
| Pore volume,ml/g | ≤0.70 | 0.70-0.90 | ≥0.85 | ≤0.70 | 0.70-0.90 | ≥0.85 |
| Granularity eligibility, % ≥ | ＞150μ 75-150μ 50-75μ ＜50μ 80 80 60 60 |
＞150μ 75-150μ 50-75μ ＜50μ 80 80 60 60 |
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| Granularity,mm | To be decided upon buyers requirements | |||||
Characteristics：
White grains of homogeneous size. Chief ingredient is silicon dioxide. Of high purity. Secure and sanitary. Can be used to separate and refine mixed components because different absorption duration on this silica gel.
Use：
For refinement of petrol products, removal of aromatic hydrocarbon material, separation and refinement of traditional Chinese herbal medicine components, preparation of high purity substance, etc.