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Product Information |
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About ProntoSIL
The ultimate ultra-pure stationary phase, is a spherical, completely porous silica gel. It is manufactured under the most stringently controlled conditions, guaranteeing constant particle and pore distribution as well as constant size and volume of the pores. This manufacturing process permits no performance-reducing micropores but yields constant specific surface area. ProntoSIL packing materials have extraordinary purity and are free from metallic contaminants that could hinder optimum peak shape. |
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| In the development of ProntoSIL phases, Bischoffs´many years of experience as well as users’ wishes for more technical information have led to more than the usual physical parameters such as specific surface area, pore size, pore volume and - for RP phases - percentage carbon content. Additional parameters provided include silica gel composition, metallic impurities, hydrophobic strength, steric selectivity, peak symmetry for basic analytes, silanol capacity and ion exchange sites. These parameters are determined by procedures such as NMR and ICP in addition to chromatographic techniques. This multiplicity of characteristics yields extremely reproducible carrier materials providing a basis for reliable, constant, batch-independent, high-performance separation columns. |
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Ultra-Pure Silica Gel
The silica gel utilized in the manufacture of ProntoSIL is 99.999% pure silica gel. A particle size distribution analyzer is used to test each batch for constant particle size. Surface area, pore size and pore volume are determined by a BET analyzer. AAS and ICP are utilized to test for metallic impurities. The extremely low level of metallic impurities guarantees that no sample will be adsorbed and no complexes will be formed during chromatographic analysis.
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Bonding and End-Capping
The silica gel is chemically modified using the most convenient procedures, in part developed by Bischoff. Efficient bonding and the elimination of harmful silanol group residues is monitored by NMR. The absence of silanol group residues is shown by the excellent chromatographic performance with respect to basic and acid analytes. Both yield equally good chromatograms.
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Packed High-Performance Separation Columns
High-performance separation columns are packed using the unique HYPERCHROME column hardware developed in-house by Bischoff and Bischoff’s own environment-friendly packing process. The spherical, mechanically stable particles of silica gel with extremely narrow size distribution ensure constant column packing at lowest operating pressures. |
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