Calibrator composition for prolactin assay

摘要

A stabilized prolactin calibrator is disclosed. The calibrator has a pH from about 5.5 to about 9.0, and contains prolactin in a 0.01 M to 0.2 M matrix of tris-(hydroxymethyl)aminomethane which additionally contains about 0.3 to 4 percent of bovine serum albumin, about 0.05 to 0.2 percent of sodium azide and from about 0.01 to about 0.2 mole/liter NaCl.