Pharmacia Fine Chemicals Ab

Jan Hakan Berglof

Lars-Olof Edvard Lindquist

John Malcolm Curling

This invention relates to a new method of isolating highly purified albumin in high yields from plasma products. According to the invention a particular plasma fraction, containing albumin in dissolved form and being essentially free from the coagulation factors I, II, VII, VIII, IX and X and from the main part of IgG, is subjected to a two-step chromatographic separation using aqueous buffer systems. The first step is carried out on an anion exchanger and the second step on a cation exchanger, or vice versa. In a preferred embodiment a buffer of pH 4.5 - 4.9 and an ionic strength of 0.025 - 0.1 is used for the separation on the anion exchanger, whereas a buffer of pH 5.2 - 6.5 and an ionic strength of 0.1 - 0.05 is used for the separation on the cation exchanger.

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Uppsala, Sweden

Jan Hakan Berglof