Critical normal human serum midpoint of 290mOsm
- Checks performance of freezing-point osmometers in the critical area of normal serum values
- Contains known and controlled quantities of some of the same solutes which comprise osmotically active particles of serum
- Pipetted into a tube and run just like normal serum
- Runs as the first and last samples in a series of tests to monitor operator technique and instrument performance
- Does not require mixing, reconstituting or refrigerating; one-year shelf life
