$ 561.25
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Specifications Retention Mechanism Anion-exchangeSample Matrix Compatibility Organic or aqueous SolutionsWeak anion exchanger ideal for extracting strong basic compounds that remain charged at all pH levelsUnlike conventional weak anion exchange SPE phases such as -NH2 (aminopropyl) that have a pKa of 9-10, a pH ≤ 7 is required to protonate or ionize the stationary phase to facilitate analyte retention. Elution is typically done by increasing the pH to 11 resulting in neutralization of the SPE phase.2-(2-pyridyl)-ethyl silica gel has a pKa of ~6. Therefore, analyte elution is feasible at a pH ≥ 7. This characteristic is important for extracting analytes that are not stable (e.g. hydrolyzes) at high pHs typically required for elution when using traditional weak anion exchangers.Ideal for extracting acyl-coenzyme A esters from tissue.Composition: bed wt, 100 mgPackaging: pk of 108Volume: 1 mLMatrix active group: WAX phaseMode of chromatography: Ion exchange
