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ZeptoGel is a sterile, isotonic, pyrogen-free solution of salts plus gelatin. When added to whole blood, ZeptoGel separates the leukocytes by taking advantage of the differential sedimentation rates of blood components. Gentle mixing of ZeptoGel (1 part) and blood (4 parts), followed by settling of the blood components for 15 to 60 minutes at 20 to 37° C, results in the formation of layers. The leukocyte fraction may be harvested by aspirating the uppermost layer.
+2° to +8° C.