Bisulfite-based tissue fixative

摘要

The present invention provides a bisulfite-based tissue fixative that improves morphology, antigen retention, and antigenicity. The fixative is suitable for use with sections of frozen tissue, cytology preparations (including touch preparations and blood smears) and other specimens used for immunohistochemical analysis. The fixative comprises an acidic buffer and a bisulfite salt in an effective amount for tissue fixation. In a preferred embodiment, the tissue fixative comprises a bisulfite salt in a concentration of from about 0.01 to about 0.25M, preferably, 0.02 to 0.25M, in an acidic buffer having a pH of from about 2 to about 6.