CHROMATOGRAPHY DEVICE AND METHOD OF USE
A chromatography device is provided comprising a filter housing having an inlet and an outlet and defining a fluid flow path between the inlet and the outlet; a porous filter arranged in the filter housing across the fluid flow path, the filter comprising first porous filter element; and a second porous filter element in contact with the first porous filter element, wherein the first porous filter element comprises at least one anionic exchange (AEX) layer, and the second porous filter element comprises at least one hydrophobic interaction (HIC) layer. A method of purifying nucleic acid using the device is also provided.
1 . A chromatography device comprising:
(a) a filter housing having an inlet and an outlet and defining a fluid flow path between the inlet and the outlet;
(b) a porous filter arranged in the filter housing across the fluid flow path, the porous filter comprising:
(i) a first porous filter element; and
(ii) a second porous filter element in contact with the first filter element, the second porous filter element arranged downstream of the first porous filter element, wherein the first filter element comprises at least one anionic exchange (AEX) layer, and the second filter element comprises at least one hydrophobic interaction (HIC) layer.
2 . The chromatography device of claim 1 , wherein the AEX layer and the HIC layer are planar membranes.
3 . The chromatography device of claim 1 , wherein the porous filter comprises a hollow cylindrical filter wherein the AEX layer surrounds the HIC layer.
4 . The chromatography device of claim 1 , wherein the porous filter includes two or more AEX layers and two or more HIC layers.
5 . A method for purifying nucleic acid, the method comprising:
(a) passing a fluid comprising nucleic acid through a chromatography device comprising a filter housing having an inlet and an outlet and defining a fluid flow path between the inlet and the outlet; a porous filter arranged in the filter housing across the fluid flow path, the porous filter comprising a first porous filter element; and a second porous filter element in contact with the first filter element, the second porous filter element arranged downstream of the first porous filter element, wherein the first filter element comprises at least one anionic exchange (AEX) layer, and the second filter element comprises at least one hydrophobic interaction (HIC) layer;
(b) binding the nucleic acid to the at least one AEX layer;
(c) eluting the nucleic acid from the at least one AEX layer in high salt;
(d) binding the nucleic acid to the at least one HIC layer; and,
(e) eluting the nucleic acid from the at least one HIC layer in low salt buffer.
6 . The chromatography device of claim 2 , wherein the porous filter includes two or more AEX layers and two or more HIC layers.
7 . The chromatography device of claim 3 , wherein the porous filter includes two or more AEX layers and two or more HIC layers.