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US 4,283,199 AGranted
Method of resolving biological solutions
AssigneeForsyth Dental Infirmary for Children
InventorElek I. Szabo
Life of this patent
Estimating the term…
Abstract
A method of resolving biological solutions which comprises forming extracting and separating zones in a cellulose-packed chromatographic column and separating the components of the adsorbed sample solution from the top extraction zone by the use of solvents of increasing or decreasing polarity and recovering separate effluent fractions from the column.
Claims14
A one-step method for the extraction and separation of an aqueous complex solution of biological origin into all of its constituent fractions in a single column, which method comprises:
- (a) introducing a predetermined volume of an aqueous solution of biological origin, having a plurality of organic compounds and inorganic salts therein, into the top of the column, which column contains a water-adsorbent support material, to provide an upper extraction zone and a lower separation zone in the column, with the water of the solution adsorbed onto the support material to form the extraction zone;
- (b) introducing into the top of the column successive predetermined volumes of solvents as eluants, the solvents of selected and sequentially increasing polarity to pass the solvents through the extraction zone to form, below the lower aqueous boundary layer of the extraction zone, a chromatographic separation zone in the column;
- (c) adsorbing the water of the aqueous solution onto the support material in the extraction zone and sequentially extracting in the extraction zone, by the successive volumes of solvents through liquid partitioning, discrete, moving, solute fractions of increasing polarity;
- (d) directly introducing the successive solute fractions into the lower separation zone from the upper extraction zone, to provide for the chromatographic resolution of the solute fractions into solute-eluant fractions of increasing polarity in the separation zone, the resolution of the solute fractions initially occurring by chromatographic adsorption and later with solute fractions of increasing polarity, resolution of the solute fractions by liquid-partition chromatography;
- and
- (e) removing the resolved eluant fractions of defined increasing polarity from the lower portion of the separation zone, thereby providing for the simple, effective and quantitative extraction and resolution of the solution into eluant fractions.
3 more elements
A one-step method for the extraction and separation of an aqueous complex solution of biological origin into all of its constituent fractions in a single column, which method comprises:
- (a) introducing a predetermined volume of an aqueous solution of biological origin into the top of the column, which solution is selected from the group consisting of urine, spinal fluid, blood serum, tissue extracts and lymph fluid, and which column contains a water-adsorbent, microcrystalline cellulosic support material, to provide an upper extraction zone and a lower separation zone in the column, with the water of the solution adsorbed onto the support material to form the extraction zone;
- (b) introducing into the top of the column successive predetermined volumes of solvents as eluants, the solvents of selected and sequentially increasing polarity of from about the polarity of benzene to about the polarity of water, to pass the solvents through the extraction zone to form, below the lower aqueous boundary layer of the extraction zone, a chromatographic separation zone in the column;
- (c) adsorbing the water of the aqueous solution onto the support material in the extraction zone and sequentially extracting in the extraction zone, by the successive volumes of solvents through liquid partitioning, discrete, moving, solute fractions of increasing polarity;
- (d) directly introducing the successive solute fractions into the lower separation zone from the upper extraction zone, to provide for the chromatographic resolution of the solute fractions into solute-eluant fractions of increasing polarity in the separation zone, the resolution of the solute fractions initially occurring by chromatographic adsorption and later with solute fractions of increasing polarity, resolution of the solute fractions by liquid-partition chromatography;
- and
- (e) removing the resolved eluant fractions of defined increasing polarity from the lower portion of the separation zone, thereby providing for the simple, effective and quantitative extraction and resolution of the solution into eluant fractions.
3 more elements
Dependencies are inferred from the claim text.