Tag Archives: sample preparation

Dialysis Membrane

Photo of a dialysis cassette used to separate analytes from interferents based on size. The dialysis membrane in this unit has a molecular weight cut-off of 10,000 g/mol. Two sheets of the membrane are separated by a gasket and held … Continue reading

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Membrane Filtration

Three types of membrane filters are used to separate an analyte from interfering species that may be present in the sample solution. Figure (a) shows a centrifugal filter for concentrating and desalting macromolecular solutions. The membrane has a nominal molecular … Continue reading

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Microwave Digestion

One method for bringing a sample into solution is a chemical digestion, often aided by heating the sample and the digesting solution. Many digestions are now carried out in a closed container using microwave radiation as the source of energy … Continue reading

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