Silicate Polymerization for the Preparation of Bed-Retention Frits in Capillary Electrochromatography
Analytical Chemistry2000Vol. 72(3), pp. 610–615
Citations Over TimeTop 10% of 2000 papers
Abstract
Bubble formation, which is associated with bed-retention frits, is a critical experimental problem in capillary electrochromatography systems. In this investigation, porous silica frits were prepared via spot-heating of a silicate solution, and the effects of several experimental parameters on their performance were studied. The optimal sodium silicate concentrations were 10.8% and 5.4% (w/v) for outlet and inlet frits, respectively. The heating times were 5-6 s for outlet frits and or = 3 h under very high current (27 microA) conditions. As part of this study, the efficiency and reproducibility of packed capillaries were also briefly evaluated.
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