Topic
Silica gel
About: Silica gel is a research topic. Over the lifetime, 22313 publications have been published within this topic receiving 325516 citations. The topic is also known as: Amorphous silica & Precipitated amorphous silica.
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TL;DR: In this paper, a one-pot synthesis in quantitative yield is described to construct a composite of the amino-derivative Zr carboxylate metal-organic framework (MOF) and silica gel (UiO-66-NH2@silica).
Abstract: A one-pot synthesis in quantitative yield is described to construct a composite of the amino-derivative Zr carboxylate metal–organic framework (MOF) and silica gel (UiO-66-NH2@silica). The silica gel was utilized as a porous solid support to enable enhanced column packing efficiency and increase the sorbent–solute contact time. The control experiment conducted on bare silica unambiguously established the active role of the amino-functionalized MOF as the ion-exchange element in the novel composite. The column prepared from this composite shows excellent hexavalent chromium uptake (Cr2O72− uptake of 277.4 mg g−1). Remarkably, this ion exchange column is capable of eliminating Cr(VI) ions even in the presence of competing anions including chloride, bromide, nitrate and sulphate, thus indicating its potential for applications in municipal as well as industrial waste water treatment.
96 citations
TL;DR: A rapid method for separating carbohydrates by means of thin-layer chromatography on silica gel G mixed with a small amount of sodium bisulfite has been developed and the carbohydrates gave characteristic colors with the reagents, thus making identification easier.
96 citations
TL;DR: The role that silica has played in the development of affinity chromatography and HPAC and the applications of silica in these methods is discussed and the types of ligands employed with silica and the methods by which these ligands have been immobilized are discussed.
Abstract: The combined use of silica-based chromatographic supports with immobilized affinity ligands can be used in many preparative and analytical applications. One example is the use of silica-based affinity columns in HPLC, giving rise to a method known as high-performance affinity chromatography (HPAC). This review discusses the role that silica has played in the development of affinity chromatography and HPAC and the applications of silica in these methods. This includes a discussion of the types of ligands that have been employed with silica and the methods by which these ligands have been immobilized. Various formats have also been presented for the use of silica in affinity chromatographic methods, including assays involving direct or indirect analyte detection, on-line or off-line affinity extraction, and chiral separations. The use of silica-based affinity columns in studies of biological systems based on zonal elution and frontal analysis methods will also be considered.
95 citations
TL;DR: This presentation describes some atypical types of silica-based particles with unique separation properties that enlarge the capabilities of HPLC methods.
95 citations
TL;DR: The retention selectivity of graphitic carbon packing materials was compared with those of octadecylsilyl- and pyrenylethylsilylsilica packing materials in reversed phase liquid chromatography as discussed by the authors.
95 citations