Osmolality

The osmolality b _osm indicates the molality of the osmotically active particles in a solution :

${\displaystyle b_{\mathrm {osm} }={\frac {n_{\mathrm {osm} }}{m_{\text{Lösungsmittel}}}}}$

With

• n _osm : _{Amount of} substance of osmotically active particles (e.g. ions , grape sugar , proteins )
• m _Solvent : mass of the solvent , usually water.

The unit of measurement for osmolality is osmol / kg. The determination of osmolality from urine , serum and plasma is important in clinical chemistry .

Not to be confused with the osmolality of the Osmola r ity , which refers to the volume of the solution.

Individual evidence

1. ↑ Axel M. Gressner, Torsten Arndt: Lexicon of Medical Laboratory Diagnostics . 2nd, revised and expanded edition. Springer, Berlin, Heidelberg 2013, ISBN 978-3-642-12921-6 , pp. 1026 , doi : 10.1007 / 978-3-642-12921-6 .