DELFIA Wash Concentrate is intended for in vitro use with the DELFIA Platewash or the AutoDELFIA™ Automatic Immunoassay System after dilution with distilled water. 25X concentration of Tris-HCl buffered (pH 7.8) salt solution with Tween 20. Contains GERMALL® II as preservative. Used to wash DELFIA assay plates prior to enhancement.