alexa High-performance monolith affinity chromatography for fast quantitation of immunoglobulin G.
Chemical Engineering

Chemical Engineering

Journal of Chromatography & Separation Techniques

Author(s): Tscheliessnig A, Jungbauer A

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Abstract High-performance monolith affinity chromatography employing protein A resins has been introduced previously for the fast purification of IgG from different sources. Here we describe the design and evaluation of a fast and specific method for quantitation of IgG from purified samples as well as crude supernatant from Chinese hamster ovary (CHO) cells. We used a commercially available affinity monolith with protein A as affinity ligand (CIM protein A HLD disk). Interferences of CHO host cell proteins with the quantitation of IgG from CHO supernatant were eliminated by a careful choice of the equilibration buffer. With this method developed, it is possible to quantify IgG within 5 min in a concentration range of 23-250 microg/ml. The calibration range of the method could be extended from 4 to 1000 microg/ml by adjusting the injection volume. The method was successfully validated by measuring the low limit of detection and quantification, inter- and intra-day precision and selectivity. This article was published in J Chromatogr A and referenced in Journal of Chromatography & Separation Techniques

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