Silica Gel for Column-layer Chromatography

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.

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.

ITEM	Index
	Type I			Type II
Type	ZCX-1	ZCX-2	ZCX-3	ZCX-1	ZCX-2	ZCX-3
Chlorides(Cl), %≤	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	300-550	200-300	≥ 550	300-550	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
Granularity, mm	To be decided upon buyers requirements