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Chromatography stationary phase material for high performance liquid chromatography

  • US 5,135,650 A
  • Filed: 05/02/1990
  • Issued: 08/04/1992
  • Est. Priority Date: 12/22/1988
  • Status: Expired due to Term
First Claim
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1. A method for converting agarose beads with pores filled with an aqueous medium and of sufficient porosity to be permeable to proteins, to beads of sufficiently low porosity to be substantially impermeable to proteins, said method comprising:

  • (a) treating said agarose beads with a first organic solvent in which agarose is soluble but which promotes swelling of agarose, to weaken the agarose while retaining said agarose in the form of beads;

    (b) replacing substantially all of said first organic solvent and any remaining water in said agarose beads with a second organic solvent which neither dissolves nor swells the agarose to cause the pores of said agarose beads to at least partially collapse, thereby imparting to said beads a reduced porosity;

    (c) placing an agarose crosslinking agent inside the pores of said beads; and

    (d) causing said crosslinking agent to crosslink the agarose inside said pores to fix said reduced porosity.

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