Radioimmunoassay of plasma steroids
First Claim
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1. An in vitro radioimmunoassay procedure comprising:
- (a) contacting a sample comprising serum proteins and steroids with a solution comprising a solvent and a solute, said solute comprising labeled steroids and specific binders for said steroids, and said solvent comprising from about 0 to about 10% by weight of a water miscible organic solvent and from about 90 to about 100% of a buffer having a pH of from about 3 to about 6, whereby the serum proteins are simultaneously inactivated while labeled and unlabeled steroids compete for binding sites on said steroid specific binders;
(b) separating bound steroids from unbound steroids into two fractions; and
(c) measuring one of said fractions for the presence of labeled steroids.
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Abstract
An in vitro radioimmunoassay procedure for measuring an amount of steroid in a sample wherein a separate serum protein inactivation step is eliminated. The separate protein serum inactivation step is eliminated by employing a solution wherein the solvent comprises from about 0 to about 10% of a water miscible organic solvent and from about 90 to about 100% of a buffer having a pH of from about 3 to about 6.
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20 Claims
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1. An in vitro radioimmunoassay procedure comprising:
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(a) contacting a sample comprising serum proteins and steroids with a solution comprising a solvent and a solute, said solute comprising labeled steroids and specific binders for said steroids, and said solvent comprising from about 0 to about 10% by weight of a water miscible organic solvent and from about 90 to about 100% of a buffer having a pH of from about 3 to about 6, whereby the serum proteins are simultaneously inactivated while labeled and unlabeled steroids compete for binding sites on said steroid specific binders; (b) separating bound steroids from unbound steroids into two fractions; and (c) measuring one of said fractions for the presence of labeled steroids. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification